Contents VOLUME 5 NUMBER 1 Chlamydia trachomatis contains a protein similar to the Legionella pneumophila mip 1 gene product Editorial A. G. Lundemose, S. Birkelund, S. J. Fey, MicroReviews P. Mose Larsen & G. Christiansen 3 The molecular basis of carbon-starvation- induced general resistance in Escherichia coli Folding in vitro and transport in vivo of pre- A. Matin B-lactamase are SecB independent A. A. Laminet, C. A. Kumamoto, A. Pliickthun The regulation of genetic competence in Bacillus subtilis Molecular characterization of an operon (hyp) D. Dubnau necessary for the activity of the three Molecular chaperones and protein hydrogenase isoenzymes in Escherichia coli translocation across the Escherichia coli inner S. Lutz, A. Jacobi, V. Schlensog, R. Bohm, membrane G. Sawers & A. Bock C. A. Kumamoto Control of pilus expression in Neisseria Research Articles gonorrhoeae as an original system in the 23 Computer modelling of the NAD binding site of family of two-component regulators ADP-ribosylating toxins: active-site structure M. K. Taha, B. Dupuy, W. Saurin, M. So & and mechanism of NAD binding C. Marchal M. Domenighini, C. Montecucco, W. C. Ripka & R. Rappuoli Completion of DNA repair-deficient Escherichia coli by the yeast Apn1 apurinic/ Evolution of the MIP family of integral apyrimidinic endonuclease gene membrane transport proteins D. Ramotar, S. C. Popoff & B. Demple G. M. Pao, L.-F. Wu, K. D. Johnson, H. Hofte, M. J. Chrispeels, G. Sweet, N. N. Sandal & Sequences downstream from the M. H. Saier, Jr transcriptional start site are essential for Identification of glyA as a symbiotically microaerobic, but not symbiotic, expression of essential gene in Bradyrhizobium japonicum the Rhizobium meliloti nifHDK promoter S. Rossbach & R. Hennecke Y.-P. Wang, K. Birkenhead, A. Dobson, B. Boesten & F. O’Gara Identification of a central regulator of stationary-phase gene expression in Molecular characterization of the gor gene Escherichia coli encoding glutathione reductase from R. Lange & R. Hengge-Aronis Pseudomonas aeruginosa: determinants of substrate specificity among pyridine 987P fimbrial gene identification and protein nucleotide-disulphide oxidoreductases characterization by T7 RNA polymerase- A. C. F. Perry, N. Ni Bhriain, N. L. Brown & induced transcription and TnphoA D. A. Rouch mutagenesis D. M. Schifferli, E. H. Beachey & R. K. Taylor The oligopeptide transport system of Bacillus Molecular characterization of the O-acetyl subtilis plays a role in the initiation of transferase gene of converting bacteriophage sporulation SF6 that adds group antigen 6 to Shigella M. Perego, C. F. Higgins, S. R. Pearce, flexneri M. P. Gallagher & J. A. Hoch N. K. Verma, J. M. Brandt, D. J. Verma & Virulence-associated chromosomal loci of A. A. Lindberg Shigella flexneri identified by random Tn5 Repression and derepression of conjugation insertion mutagenesis of plasmid R1 by wild-type and mutated finP N. Okada, C. Sasakawa, T. Tobe, M. Yamada, antisense RNA S. Nagai, K. A. Talukder, K. Komatsu, G. Koraimann, C. Koraimann, V. Koronakis, S. Kanegasaki & M. Yoshikawa S. Schlager & G. H6genauer Purification and characterization of two- Partial deletion of the Rhizobium phaseoli subunit cytochrome aa; from Bacillus cereus CFN23 symbiotic plasmid implies a J. A. Garcia-Horsman, B. Barquera, concomitant amplification of plasmid DNA D. Gonzalez-Halphen & J. E. Escamilla sequences G. Sober6én-Chavez, R. Najera, E. Calva & Evidence that the entire length of a kinetoplast M. Fernandez DNA minicircle is transcribed in Trypanosoma cruzi Control of replication of plasmid R1: the R. Thertulien, G. Harth & C. G. Haidaris intergenic region between copA and repA modulates the level of expression of repA Characterization of the yellow-pigment genes A. Berzal-Herranz, E. G. H. Wagner & of Erwinia herbicola R. Diaz-Orejas L.-Y. Lee & S.-T. Liu A recombinant C-terminal toxin fragment The general protein-export pathway is directly provides evidence that membrane insertion is required for extracellular pullulanase secretion important for Clostridium perfringens in Escherichia coli K12 enterotoxin cytotoxicity A. P. Pugsley, M. G. Kornacker & |. Poquet P. C. Hanna & B. A. McClane Promoter sequence requirements for Fnr- dependent activation of transcription of the narGHJI operon VOLUME 5 NUMBER 2 M. S. Walker & J. A. DeMoss Detection of a gene encoding a phosphatidylinositol-specific phospholipase C MicroReviews that is co-ordinately expressed with 233 +=~The replication of plasmid pSC101 listeriolysin in Listeria monocytogenes D. Manen & L. Caro M. Leimeister-Wachter, E. Domann & T. Chakraborty 239 Molecular aspects of microbial ice nucleation G. Warren & P. Wolber Identification of phosphatidylinositol-specific Research Articles phospholipase C activity in Listeria monocytogenes: a novel type of virulence 245 3’ processing in Dictyostelium: unusual factor? sequence requirements and interaction with a J. Mengaud, C. Braun-Breton, & P. Cossart downstream promoter M. Maniak & W. Nellen Nucleotide sequence of the Escherichia coli The cell envelope of the hyperthermophilic thymidine kinase gene provides evidence for archaebacterium Pyrobaculum conservation of functional domains and organotrophum consists of two regularly quaternary structure arrayed protein layers: three-dimensional M. E. Black & D. E. Hruby structure of the outer layer Genetic analysis of superoxide dismutase, the B. M. Phipps, R. Huber & W. Baumeister 23 kilodalton antigen of Mycobacterium Molecular cloning, partial purification, and tuberculosis characterization of a haemin-binding Y. Zhang, R. Lathigra, T. Garbe, D. Catty & lipoprotein from Haemophilus influenzae D. Young type b Functioning of the stable signal peptide of the M. S. Hanson & E. J. Hansen pCloDF13-encoded bacteriocin release protein Pilin expression and processing in pilus J. Luirink, B. Duim, J. W. L. de Gier & B. Oudega mutants of Neisseria gonorrhoeae: critical role of Gly_, in assembly The role of a stress-response protein in M. Koomey, S. Bergstrom, M. Blake & Salmonella typhimurium virulence J. Swanson K. Johnson, |. Charles, G. Dougan, D. Pickard, P. O’Gaora, G. Costa, T. Ali, |. Miller The stringent response in Streptomyces & C. Hormaeche coelicolor A3(2) E. Strauch, E. Takano, H. A. Baylis & M. J. Bibb P.70 pertactin, an outer-membrane protein from Bordetella parapertussis: cloning, identification of gene products of the P1 nucleotide sequence and surface expression operon of Mycoplasma pneumoniae in Escherichia coli B. Sperker, P.-c. Hu & R. Herrmann L. J. Li, G. Dougan, P. Novotny & |. G. Charles Molecular analysis of the virulence locus of Segment IV of a Salmonella flagellin gene the Salmonella dublin plasmid pSDL2 specifies flagellar antigen epitopes M. Krause, C. Roudier, J. Fierer, J. Harwood, & S. M. C. Newton, R. D. Wasley, A. Wilson, D. Guiney L. T. Rosenberg, J. F. Miller & B. A. D. Stocker An O antigen can interfere with the function of the Yersinia pseudotuberculosis invasin Sequence and expression analysis of a cAMP- responsive gene regulated during late protein D. L. Voorhis, S. Dillon, S. B. Formal & development of Dictyostelium discoideum R. R. Isberg D. P. Ramji, J. T. J. Donovan & B. D. Hames Role of transcription pausing in the control of Design of CAMP-CRP-activated promoters in the pyrE attenuator in Escherichia coli Escherichia coli J. T. Andersen, K. F. Jensen & P. Poulsen P. Valentin-Hansen, B. Holst, L. Segaard-Andersen, J. Martinussen, J. Nesvera Molecular analysis of the methane & S. R. Douthwaite monooxygenase (MMO) gene cluster of Methylosinus trichosporium OB3b The TraM protein of plasmid R1 is a DNA- D. L. N. Cardy, V. Laidler, G. P. C. Salmond & binding protein J. C. Murrell M. Schwab, H. Gruber & G. Hégenauer The secretion genes of Pseudomonas Gene sequences and comparison of the aeruginosa alkaline protease are functionally fimbrial subunits representative of related to those of Erwinia chrysanthemi Bacteroides nodosus serotypes A to |: class | proteases and Escherichia coli «-haemolysin and class Il strains J. Guzzo, F. Duong, C. Wandersman, M. Murgier, J. S. Mattick, B. J. Anderson, P. T. Cox, & A. Lazdunski B. P. Dalrymple, M. M. Bills, M. Hobbs & J. R. Egerton Two global regulators repress the anaerobic expression of MnSOD in Escherichia coli::Fur Catabolite repression of «-amylase gene (ferric uptake regulation) and Arc (aerobic expression in Bacillus subtilis involves a trans- respiration control) acting gene product homologous to the B. Tardat & D. Touati Escherichia coli lacl and gailR repressors The trpC gene of Phanerochaete T. M. Henkin, F. J. Grundy, W. L. Nicholson & chrysosporium is unique in containing an G. H. Chambliss intron but nevertheless maintains the order of intervening sequences (IVSs) in the 23S functional domains seen in other fungi ribosomal RNA genes of pathogenic Yersinia A. Schrank, C. Tempelaars, P. F. G. Sims, enterocolitica strains. The IVSs in Y. S. G. Oliver & P. Broda enterocolitica and Salmonella typhimurium Post-transcriptional control of a sporulation have a common origin regulatory gene encoding transcription factor M. Skurnik & P. Toivanen o" in Bacillus subtilis Elimination of the disulphide bridge in J. Healy, J. Weir, |. Smith, & R. Losick fragment B of diphtheria toxin: effect on Variable antigen genes of the relapsing fever membrane insertion, channel formation, and agent Borrelia hermsii are activated by ATP binding promoter addition H. Stenmark, S. Olsnes & |. H. Madshus A. G. Barbour, N. Burman, C. J. Carter, T. Kitten & S. Bergstrom The cloning and DNA sequence of the gene for the glutathione-regulated potassium-efflux Roles of DNA adenine methylation in system KefC of Escherichia coli controlling replication of the REPI replicon of A. W. Munro, G. Y. Ritchie, A. J. Lamb, plasmid pColV-K30 R. M. Douglas & |. R. Booth A. E. Gammie & J. H. Crosa 1S801, an insertion sequence element isolated Physical and genetic map of the from Pseudomonas syringae pathovar Methanococcus voltae chromosome phaseolicola J. Sitzmann & A. Klein M. Romantschuk, G. Y. Richter, P. Mukhopadhyay & D. Mills Error-prone EF-Tu reduces in vivo enzyme VOLUME 5 NUMBER 3 activity and cellular growth rate D. Hughes MicroReviews A copy-number mutant of plasmid pSC101 515 Selenocysteine: the 21st amino acid G.-X. Xia, D. Manen, T. Goebel, P. Linder, A. Bock, K. Forchhammer, J. Heider, G. Churchward, & L. Caro W. Leinfelder, G. Sawers, B. Veprek & F. Zinoni lonizing groups in lipopolysaccharides of 521 Pore-forming cytolysins of Gram-negative Pseudomonas cepacia in relation to antibiotic bacteria resistance R. A. Welch A. D. Cox & S. G. Wilkinson Physiological roles of the DnaK and GroE The ferric-pseudobactin receptor PupA of stress proteins: catalysts of protein folding or Pseudomonas putida WCS358: homology to macromolecular sponges? TonB-dependent Escherichia coli receptors R. A. LaRossa & T. K. Van Dyk and specificity of the protein Physiology and molecular genetics of poly(- W. Bitter, J. D. Marugg, L. A. de Weger, hydroxy-alkanoic acid) synthesis in J. Tommassen & P. J. Weisbeek Alcaligenes eutrophus Gas vesicle synthesis in the cyanobacterium A. Steinbiichel & H. G. Schlegel Pseudanabaena sp.: occurrence of a single Research Articles photoregulated gene T. Damerval, A.-M. Castets, J. Houmard & 543 Organization of the fimbrial gene region of N. Tandeau de Marsac Bacteroides nodosus: class | and class Il strains Involvement of fixLJ in the regulation of M. Hobbs, B. P. Dalrymple, P. T. Cox, nitrogen fixation in Azorhizobium caulinodans S. P. Livingstone, S. F. Delaney & J. S. Mattick P. A. Kaminski & C. Elmerich Penicillin-binding protein 4 of Escherichia coli: Research Articles molecular cloning of the dacB gene, controlled 805 A suppressor of yeast spp81/ded1 mutations overexpression, and alterations in murein encodes a very similar putative ATP- composition dependent RNA helicase B. Korat, H. Mottl, & W. Keck D. J. Jamieson & J. D. Beggs Transcriptional analysis of the restriction and Translational coupling varying in efficiency modification genes of bacteriophage P1 between different pairs of genes in the central A. D. Sharrocks & D. P. Hornby region of the atp operon of Escherichia coli Structure and sequence of the rfb (O antigen) K. Hellmuth, G. Rex, B. Surin, R. Zinck & gene cluster of Salmonella serovar J. E. G. McCarthy typhimurium (strain LT2) ERIC sequences: a novel family of repetitive X.-M. Jiang, B. Neal, F. Santiago, S. J. Lee, elements in the genomes of Escherichia coli, L. K. Romana & P. R. Reeves Salmonella typhimurium and other Gene 32 transcription and mRNA processing enterobacteria in T4-related bacteriophages C. S. J. Hulton, C. F. Higgins & P. M. Sharp D. Loayza, A. J. Carpousis & H. M. Krisch Characterization of the RNA polymerases of Comparison of the class 1 outer membrane Crithidia fasciculata proteins of eight serological reference strains J. Kock & A. W. C. A. Cornelissen of Neisseria meningitidis M. C. J. Maiden, J. Suker, A. J. McKenna, The IgA-binding 8 antigen of the c protein J. A. Bygraves & |. M. Feavers complex of Group B streptococci: sequence determination of its gene and detection of two nolC, a Rhizobium fredii gene involved in binding regions cultivar-specific nodulation of soybean, shares P. G. Jeristrém, G. S. Chhatwal & K. N. Timmis homology with a heat-shock gene H. B. Krishnan & S. G. Pueppke The gene specifying RNase E (rne) and a gene affecting mRNA stability (ams) are the same Osmotic induction of the periplasmic trehalase gene in Escherichia coli K12: characterization of the L. Taraseviciene, A. Miczak & D. Apirion treA gene promoter F. Repoila & C. Gutierrez Genetic studies of cleavage-initiated mRNA decay and processing of ribosomal 9S RNA The role of o* in prespore-specific show that the Escherichia coli ams and rne transcription in Bacillus subtilis loci are the same S. R. Partridge, D. Foulger and J. Errington O. Melefors & A. von Gabain Two distinct steps in pullulanase secretion by Escherichia coli K12 VOLUME 5 NUMBER 4 A. P. Pugsley, |. Poquet & M. G. Kornacker Structure and function of periplasmic MicroReviews chaperone-like proteins involved in the 769 The Escherichia coli cell cycle: one cycle or biosynthesis of K88 and K99 fimbriae in multiple independent processes that are co- enterotoxigenic Escherichia coli ordinated? D. Bakker, C. E. M. Vader, B. Roosendaal, K. Nordstr6m, R. Bernander & S. Dasgupta F. R. Mooi, B. Oudega & F. K. de Graaf Calcium in bacteria: a solution to which Temperature-regulated expression of invasion problem? genes in Shigella flexneri is controlled through V. Norris, M. Chen, M. Goldberg, J. Voskuil, the transcriptional activation of the virB gene G. McGurk & |. B. Holland on the large plasmid T. Tobe, S. Nagai, N. Okada, B. Adler, Local DNA topology and gene expression: the M. Yoshikawa, & C. Sasakawa case of the /eu-500 promoter D. M. J. Lilley & C. F. Higgins Origin of tetracycline efflux proteins: A model for asymmetric septum formation conclusions from nucleotide sequence during sporulation in Bacillus subtilis analysis J. Errington R. P. Sheridan & |. Chopra Cell division and peptidoglycan assembly in Regulation of the chiA locus of Escherichia Escherichia coli coli K12: involvement of molybdenum cofactor N. Nanninga K. P. Baker & D. H. Boxer A family of clostridial and streptococcal Formation of Rhizobium phaseoli symbiotic ligand-binding proteins with conserved C- plasmids by genetic recombination terminal repeat sequences G. Sober6én-Chavez, R. Najera, G. Espin & B. W. Wren S. Moreno ? vii L-pilin variants of Neisseria gonorrhoeae ymoA, a Yersinia enterocolitica chromosomal MS11 gene modulating the expression of virulence P. A. Manning, A. Kaufmann, U. Roll, J. Pohiner, functions T. F. Meyer & R. Haas G. R. Cornelis, C. Sluiters, |. Delor, D. Geib, K. Kaniga, C. Lambert de Rouvroit, M.-P. Sory, Isolation and properties of the RepA1 protein J.-C. Vanooteghem & T. Michiels of the IncFll replicon, RepFiC R. Maas, J. Oppenheim, S. Saadi, T. Fuchs & Peptide transport and chemotaxis in W. K. Maas Escherichia coli and Salmonella typhimurium: Insertional inactivation of the Staphylococcus characterization of the dipeptide permease aureus £-toxin by bacteriophage 13 occurs (Dpp) and the dipeptide-binding protein by site- and orientation-specific integration of W. N. Abouhamad, M. Manson, M. M. Gibson & the 613 genome C. F. Higgins D. Coleman, J. Knights, R. Russell, D. Shanley, T. H. Birkbeck, G. Dougan & |. Charles DNA sequence and analysis of the bet genes encoding the osmoregulatory choline—glycine A sugar-specific porin, ScrY, is involved in betaine pathway of Escherichia coli sucrose uptake in enteric bacteria T. Lamark, |. Kaasen, M. W. Eshoo, K. Schmid, R. Ebner, K. Jahreis, J. W. Lengeler & P. Falkenberg, J. McDougall & A. R. Strom F. Titgemeyer Pleiotropic changes resulting from depietion A class of gyrB inutants, substantially of Era, an essential GTP-binding protein in unaffected in DNA topology, suppresses the Escherichia coli Escherichia coli K12 ftsZ34 mutation C. G. Lerner & M. Inouye |. Ruberti, F. Crescenzi, L. Paolozzi & P. Ghelardini Replication mutants of Staphylococcus aureus macrolide—lincosamide—streptogramin B Structure—function analysis of the K88ab resistance plasmid pT48 fimbrial subunit protein from porcine |. Catchpole & K. G. H. Dyke enterotoxigenic Escherichia coli A novel function of the cAMP-—CRP complex in P. A. Pedersen Escherichia coli: CAMP-—CRP functions as an adaptor for the CytR repressor in the deo Analysis of the gluconate (gnt) operon of operon Bacillus subtilis A. Reizer, J. Deutscher, M. H. Saier, Jr & J. Reizer L. Segaard-Andersen, H. Pedersen, B. Holst & P. Valentin-Hansen Identification and characterization of a The surface-located YopN protein is involved conserved outer-membrane protein of in calcium signal transduction in Yersinia Neisseria gonorrhoeae pseudotuberculosis R. C. Judd, J. C. Strange, R. K. Pettit & A. Forsberg, A.-M. Viitanen, M. Skurnik & W. M. Shafer H. Wolf-Watz Gonococcal penicillin-binding protein 3 and Modular structure of FixJ: homology of the the surface-exposed 44kDa peptidoglycan- transcriptional activator domain with the —35 binding protein appear to be the same domain of sigma factors molecule D. Kahn & G. Ditta W. M. Shafer & R. C. Judd Binding of the immunity protein inactivates colicin M VOLUME 5 NUMBER 5 T. Olschlager, A. Turba & V. Braun Molecular cloning of a gene involved in MicroReviews lipooligosaccharide biosynthesis and virulence 999 The role of RNA polymerase in transcriptional expression by Haemophilus influenzae type B fidelity L. D. Cope, R. Yogev, J. Mertsola, J. L. Latimer, R. T. Libby & J. A. Gallant M. S. Hanson, G. H. McCracken, Jr & 1005 The to/ gene products and the import of E. J. Hansen macromolecules into Escherichia coli The cephamycin biosynthetic genes pcbAB, R. E. Webster encoding a large multidomain peptide synthetase, and pcbC of Nocardia Research Articles lactamdurans are clustered together in an 1013 Molecular analysis of a complex locus from organization different from the same genes in Haemophilus influenzae involved in phase- Acremonium chrysogenum and Penicillium variable lipopolysaccharide biosynthesis chrysogenum D. J. Maskell, M. J. Szabo, P. D. Butler, J. J. R. Coque, J. F. Martin, J. G. Calzada & A. E. Williams & E. R. Moxon P. Liras Characterization of legiolysin (/ly), responsible Evidence for a common molecular origin of the for haemolytic activity, colour production and capsule gene loci in Gram-negative bacteria fluorescence of Legionella pneumophila expressing group Il capsular polysaccharides E. Wintermeyer, U. Rdest, B. Ludwig, A. Debes & M. Frosch, U. Edwards, K. Bousset, B. KrauBe & J. Hacker C. Weisgerber Chromosome strand segregation during The role of the OOP antisense RNA in sporulation in Bacillus subtilis coliphage \ development J. Errington & R. G. Wake L. Krinke, M. Mahoney & D. L. Wulff A gene (prsA) of Bacillus subtilis involved in a Common and variable domains of the flagellin novel, late stage of protein export gene, flaA, in Campylobacter jejuni V. P. Kontinen, P. Saris & M. Sarvas S. H. Fischer & |. Nachamkin The hha gene modulates haemolysin A DNA region of 9 kbp contains all genes expression in Escherichia coli necessary for gas vesicle synthesis in J. M. Nieto, M. Carmona, S. Bolland, Y. Jubete, halophilic archaebacteria F. de la Cruz & A. Juarez M. Horne, C. Englert, C. Wimmer & P. Pfeifer A pyruvate-stimulated adenylate cyclase has a sequence related to the fes/fps oncogenes and to eukaryotic cyclases E. P. Peters, A. F. Wilderspin, S. P. Wood, M. J. J. M. Zvelebil, O. Sezer & A. Danchin VOLUME 5 NUMBER6 Selenocysteyl-tRNA occurs in the diatom Thalassiosira and in the ciliate Tetrahymena MicroReviews D. L. Hatfield, B. J. Lee, N. M. Price & 1295 The RecA protein as a recombinational repair T. C. Stadtman system A cloned ompR-like gene of Streptomyces M. M. Cox lividans 66 suppresses defective me/C1, a 1301 Fermentable sugars and intracellular acidi- putative copper-transfer gene fication as specific activators of the RAS— H.-C. Tseng & C. W. Chen adenylate cyclase signalling pathway in yeast: the relationship to nutrient-induced cell cycle Genetic and biochemical analysis of the control aspartokinase from Corynebacterium J. M. Thevelein glutamicum J. Kalinowski, J. Cremer, B. Bachmann, L. Eggeling, H. Sahm & A. Pihler Research Articles ' 1309 Cassette mutagenesis implicates a helix-turn- Expression of Salmonella typhi and helix motif in promoter recognition by the Escherichia coli OmpC is influenced differently novel RNA polymerase sigma factor o™ by medium osmolarity; dependence on J. R. Coppard & M. J. Merrick Escherichia coli OmpR J. L. Puente, A. Verdugo-Rodriguez & E. Calva Genetic analysis of the Erwinia chrysanthemi 3937 chrysobactin iron-transport system: Escherichia coli chromosomal mutations that characterization of a gene cluster involved in permit direct cloning of the Bacteroides uptake and biosynthetic pathways fragilis metallo-B-lactamase gene, ccrA T. Franza, C. Enard, F. van Gijsegem & B. A. Rasmussen, Y. Gluzman & F. P. Tally D. Expert Nucleotide sequence of the endoglucanase C The ArsR protein is a trans-acting regulatory gene (cenC) of Cellulomonas fimi, its high- protein level expression in Escherichia coli, and J. Wu & B. P. Rosen characterization of its products Analysis of an anaerobically induced promoter J. B. Coutinho, B. Moser, D. G. Kilburn, for the cobalamin biosynthetic genes in R. A. J. Warren & R. C. Miller, Jr Salmonella typhimurium Light and oxygen effects share a common A. A. Richter-Dahlfors & D. |. Andersson regulatory DNA sequence in Rhodobacter Mitochondrial gene sequences show fungal capsulatus homology for Pneumocystis carinii G. Klug, N. Gad’on, S. Jock & M. L. Narro F. J. Pixley, A. E. Wakefield, S. Banerji & The glucose permease of the J. M. Hopkin phosphotransferase system of Bacillus Characterization of a polygalacturonase gene subtilis: evidence for lI@"* and t°'° domains of Aspergillus niger RH5344 G. Gonzy-Tréboul, J. H. de Waard, M. Zagorec & E. Ruttkowski, N. Q. Khanh, F.-J. Wientjes & P. W. Postma M. Gottschalk Sequential activation of dual promoters by Anaerobic growth and cyanide synthesis of different sigma factors maintains spoVJ Pseudomonas aeruginosa depend on anr, a expression during successive developmental regulatory gene homologous with fnr of stages of Bacillus subtilis Escherichia coli D. Foulger & J. Errington A. Zimmermann, C. Reimmann, M. Galimand & D. Haas A chimeric nucleotide-binding protein, encoded by a hisP-—mailK hybrid gene, is Genetic analysis of the rfb region of Shigella functional in maltose transport in Salmonelia flexneri encoding the Y serotype O-antigen typhimurium specificity E. Schneider & C. Walter D. F. Macpherson, R. Morona, D. W. Beger, K.-C. Cheah & P. A. Manning Intranasal immunization using the B subunit of the Escherichia coli heat-labile toxin fused to an epitope of the Bordetella pertussis P.69 Anthrax toxin protective antigen: low-pH- antigen induced hydrophobicity and channel formation M. Lipscombe, |. G. Charles, M. Roberts, in liposomes G. Dougan, J. Tite & N. F. Fairweather T. M. Koehler & R. J. Collier Construction and characterization of Pro-peptide as an intermolecular chaperone: Bordetella pertussis mutants lacking the vir- renaturation of denatured subtilisin E with a regulated P.69 outer membrane protein synthetic pro-peptide M. Roberts, N. F. Fairweather, E. Leininger, Y. Ohta, H. Hojo, S. Aimoto, T. Kobayashi, X. Zhu, D. Pickard, E. L. Hewlett, A. Robinson, F. Jordan & M. Inouye C. Hayward, G. Dougan & |. G. Charles Mutations in the aphA-2 gene of transposon Organization of genes encoding membrane Tn5 mapping within the regions highly proteins of the Escherichia coli ferri- conserved in aminoglycoside-phospho- enterobactin permease transferases strongly reduce aminoglycoside S. S. Chenault & C. F. Earhart resistance J. Blazquez, J. Davies & F. Moreno Nucleotide sequence and genetic organization of the ferric enterobactin transport system: The Rhizobium meliloti exoZ/exoB fragment of homology to other periplasmic binding megaplasmid 2: ExoB functions as a UDP- protein-dependent systems in Escherichia coli glucose 4-epimerase and ExoZ shows homo- C. M. Shea & M. A. Mcintosh logy to NodX of Rhizobium leguminosarum Characterization of the opa (class 5) gene biovar viciae strain TOM family of Neisseria meningitidis A. M. Buendia, B. Enenkel, R. Képlin, K. Niehaus, E. L. Aho, J. A. Dempsey, M. M. Hobbs, W. Arnold & A. Puhler D. G. Klapper & J. G. Cannon Enhancement of the invasive ability of Type 1 fimbriae mutants of Escherichia coli Neisseria gonorrhoeae by contact with HecIB, K12: characterization of recognized afimbriate an adenocarcinoma endometrial cell line strains and construction of new fim deletion J. C.-R. Chen, P. Bavoil & V. L. Clark mutants |. C. Blomfield, M. S. McClain & B. |. Eisenstein A new system for amplifying 2;.m plasmid copy number in Saccharomyces cerevisiae Allelic exchange in Escherichia coli using the S. Unternahrer, D. Pridmore & A. Hinnen Bacillus subtilis sacB gene and a temperature- sensitive pSC101 replicon The Haemophilus influenzae capsulation gene |. C. Blomfield, V. Vaughn, R. F. Rest & cluster: a compound transposon B. |. Eisenstein J. S. Kroll, B. M. Loynds & E. R. Moxon Organization of the genes coding for the reaction-centre L and M subunits and B870 Transformation of Mycobacterium aurum and antenna polypeptides a and £ from the aerobic Mycobacterium smegmatis with the broad photosynthetic bacterium Erythrobacter host-range Gram-negative cosmid vector species OCH114 pJRD215 R. Liebetanz, U. Hornberger & G. Drews J. Hermans, C. Martin, G. N. M. Huijberts, T. Goosen & J. A. M. de Bont Identification and molecular characterization of a transcriptional regulator from Pseudo- Macronuclear and micronuclear monas aeruginosa PAQ1 exhibiting structural configurations of a gene encoding the protein and functional similarity to the FNR protein of synthesis elongation factor EF 10 in Escherichia coli Stylonychia lemnae R. G. Sawers P. Bierbaum, T. Dénhoff & A. Klein VOLUME 5 NUMBER 7 A gene in the archaebacterium Sulfolobus solfataricus that codes for a protein equivalent to the alpha subunits of the signal recognition MicroReviews particle receptor in eukaryotes 1577 Mucoid Pseudomonas aeruginosa in cystic C. Ramirez & A. T. Matheson fibrosis: signal transduction and histone-like The three-dimensional structure of the regular elements in the regulation of bacterial surface protein of Comamonas acidovorans virulence derived from native outer membranes and V. Deretic, C. D. Mohr & D. W. Martin reconstituted two-dimensional crystals TyrR protein of Escherichia coli and its role as H. Engelhardt, S. Gerbl-Rieger, U. Santarius & repressor and activator W. Baumeister A. J. Pittard & B. E. Davidson Both genes for EF-1a in Candida albicans are Regulation of methionine synthesis in translated Escherichia coli P. Sundstrom, M. Irwin, D. Smith & P. S. Sypherd H. Weissbach & N. Brot Possible role of calmodulin in the secretion of Regulation of capsular polysaccharide Entamoeba histolytica electron-dense synthesis in Escherichia coli K12 granules containing collagenase S. Gottesman & V. Stout M. de L. Mufioz, M. A. Moreno, J. N. Pérez- Garcia, G. R. Tovar & V. |. Hernandez Filamentous phage assembly M. Russel Purification and mutant analysis of Citrobacter freundii AmpR, the regulator for chromosomal AmpC £-lactamase Research Articles E. Bartowsky & S. Normark 1615 The repair of double-strand breaks and S1 Expression of the fibronectin-binding nuclease-sensitive sites can be monitored components of Streptococcus pyogenes in chromosome-specifically in Saccharomyces Escherichia coli demonstrates that they are cerevisiae using pulsed-field gel proteins electrophorsesis S. R. Talay, E. Ehrenfeld, G. S. Chhatwal & E.-M. Geig! & F. Eckardt-Schupp K. N. Timmis Thirty-three nucleotides of 5’ flanking Marker exchange mutagenesis of the hydN sequence including the ‘TATA’ box are genes in Desulfovibrio fructosovorans necessary and sufficient for efficient U2 M. Rousset, Z. Dermoun, M. Chippaux & snRNA transcription in Schizosaccharomyces J. P. Bélaich pombe T. Dandekar & D. Tollervey Absence of acetohydroxy acid synthetase III in Salmonella typhimurium is due to early Topographic analysis of the toxic Gef protein termination of translation within the i/vi gene from Escherichia coli E. Ricca, C. T. Lago, M. Sacco & M. De Felice L. K. Poulsen, A. Refn, S. Molin & P. Andersson The gef gene from Escherichia coli is The mdoA locus of Escherichia coli consists of regulated at the level of translation an operon under osmotic control L. K. Poulsen, A. Refn, S. Molin & P. Andersson J.-M. Lacroix, |. Loubens, M. Témpete, B. Menichi & J.-P. Bohin Cloning and sequencing of the structural gene for the porin protein of Bordetella pertussis Analysis of structure and function of the B Z. M. Li, J. H. Hannah, S. Stibitz, N. Y. Nguyen, subunit of cholera toxin by the use of site- C. R. Manclark & M. J. Brennan directed mutagenesis M. G. Jobling & R. K. Holmes Substitutions at a single amino acid residue in the nitrogen-regulated activator protein NTRC Deletion of the COX7 gene in Saccharomyces differentially influence its activity in response cerevisiae reveals a role for cytochrome c to phosphorylation oxidase subunit VIl in assembly of remaining R. Dixon, T. Eydmann, N. Henderson & S. Austin subunits K. M. Calder & J. E. McEwen In vitro activation of Escherichia coli prohaemolysin to the mature membrane- Characterization of the oriT region of the targeted toxin requires HlyC and a low IncFV plasmid pED208 molecular-weight cytosolic polypeptide L. Di Laurenzio, L. S. Frost, B. B. Finlay & K. R. Hardie, J.-P. Issartel, E. Koronakis, W. Paranchych C. Hughes & V. Koronakis Differential decay of a polycistronic Preferential cytoplasmic location of FtsZ, a Escherichia coli transcript is initiated by protein essential for Escherichia coli septation RNase E-dependent endonucleolytic J. Pla, M. Sanchez, P. Palacios, M. Vicente & processing M. Aldea P. Nilsson & B. E. Uhlin xi 1801 Location of the RNA-processing enzymes Transcriptional regulation of a Bacillus subtilis RNase Ill, RNase E and RNase P in the dipeptide transport operon Escherichia coli cell F. J. Slack, J. P. Mueller, M. A. Strauch, A. Miczak, R. A. K. Srivastava & D. Apirion C. Mathiopoulos & A. L. Sonenshein Secretion of a potential virulence factor, a The spoilIA operon of Bacillus subtilis defines fungal ribonucleotoxin, during human a new temporal class of mother-cell-specific aspergillosis infections sporulation genes under the control of the o® B. Lamy, M. Moutaouakil, J.-P. Latge & J. Davies form of RNA polymerase N. llling & J. Errington Site-specific insertion of genes into integrons: role of the 59-base element and determination VOLUME 5 NUMBER 8 of the recombination cross-over point R. M. Hall, D. E. Brookes & H. W. Stokes The rifampicin-inducible genes srnB from F MicroReviews and pnd from R483 are regulated by antisense 1817 The pathogenic mechanisms of Shiga toxin RNAs and mediate plasmid maintenance by and the Shiga-like toxins killing of plasmid-free segregants V.L. Tesh & A. D. O’Brien A. K. Nielsen, P. Thorsted, T. Thisted, E. G. H. Wagner & K. Gerdes 1823 Regulation of retrotransposition in Saccharomyces cerevisiae Closely linked genetic loci required for swarm M. J. Curcio & D. J. Garfinkel cell differentiation and multicellular migration by Proteus mirabilis Research Articles C. Allison & C. Hughes 1831 The role of pili in the interactions of Regulation of nitrogen fixation in pathogenic Neisseria with cultured human Azorhizobium caulinodans: identification of a endothelial cells fixK-like gene, a positive regulator of nifA M. Virji, H. Kayhty, D. J. P. Ferguson, P. A. Kaminski, K. Mandon, F. Arigoni, C. Alexandrescu, J. E. Heckels & E. R. Moxon N. Desnoues & C. Elmerich The Entamoeba histolytica rDNA episome: Interspecies recombinational events during nuclear localization, DNAse | sensitivity map, the evolution of altered PBP 2x genes in and specific DNA-protein interactions penicillin-resistant clinical isolates of M. Zurita, A. Alagon, J. Vargas-Villareal & Streptococcus pneumoniae P. M. Lizardi G. Laible, B. G. Spratt & R. Hakenbeck Cloning and expression of the rfe—rff gene Pseudomonas aeruginosa LasA: a second cluster of Escherichia coli elastase under the transcriptional control of M. Ohta, K. Ina, K. Kusuzaki, N. Kido, Y. Arakawa lasR & N. Kato D. S. Toder, M. J. Gambello & B. H. Iglewski Structure of two retrons of Escherichia coli Simultaneous expression of a bacteriophage and their common chromosomal insertion site Mu transposase and repressor: a way of D. Lim preventing killing due to mini-Mu replication Cloning of the rfb gene cluster of 4 group C2 A. Toussaint, D. Expert & L. Desmet Salmonelia strain: comparison with the rfb Characterization of a Legionella pneumophila regions of groups B and D gene encoding a lipoprotein antigen P. K. Brown, L. K. Romana & P. R. Reeves N. C. Engleberg, D. C. Howe, J. E. Rogers, Complement activation and antibody binding J. Arroyo & B. |. Eisenstein by pneumolysin via a region of the toxin Transcription of the Vibrio cholerae homologous to a human acute-phase protein haemolysin gene, hlyA, and cloning of a T. J. Mitchell, P. W. Andrew, F. K. Saunders, positive regulatory locus, hiyU A. N. Smith & G. J. Boulnois S. G. Williams & P. A. Manning The opacity proteins of Neisseria gonorrhoeae Evolved neomycin phosphotransferase from strain MS11 are encoded by a family of 11 an isolate of Klebsiella pneumoniae complete genes K.-Y. Lee, J. D. Hopkins & M. Syvanen K. S. Bhat, C. P. Gibbs, O. Barrera, S. G. Morrison, F. Jahnig, A. Stern, 1$900-promoted stable integration of a foreign E.-M. Kupsch, T. F. Meyer & J. Swanson gene into mycobacteria P. M. England, S. Wall & J. McFadden A Bacillus subtilis dipeptide transport system expressed early during sporulation Repression and induction of the nag regulon C. Mathiopoulos, J. P. Mueller, F. J. Slack, of Escherichia coli K-12: the roles of nagC and C. G. Murphy, S. Patankar, G. Bukusoglu & nagA in maintentance of the uninduced state A. L. Sonenshein J. A. Plumbridge xii 2063 Bacillus subtilis cytochrome oxidase mutants: Construction of a physical map of the biochemical analysis and genetic evidence for chromosome of Shigella flexneri 2a and the two aa;-type oxidases direct assir; nent of nine virulence-associated J. van der Oost, C. von Wachenfeld, loci identified by Tn5 insertions L. Hederstedt & M. Saraste N. Okada, C. Sasakawa, T. Tobe, K. A. Talukder, K. Komatsu & M. Yoshikawa Separate promoters direct expression of VOLUME 5 NUMBER 9 phoAlll, a member of the Bacillus subtilis alkaline phosphatase multigene family, during phosphate starvation and sporulation MicroReviews R. S. Chesnut, C. Bookstein & F. M. Hulett 2073 PhoP/PhoQ: macrophage-specific modulators Analysis of an Erwinia chrysanthemi gene of Salmonelia virulence? cluster involved in pectin degradation S. |. Miller S. Reverchon, W. Nasser & J. Robert-Baudouy 2079 Control of maltase synthesis in yeast Characterization of kdgR, a gene of Erwinia R. Needleman chrysanthemi that regulates pectin 2085 The role of the ‘gearbox’ in the transcription of degradation. essential genes S. Reverchon, W. Nasser & J. Robert-Baudouy M. Vicente, S. R. Kushner, T. Garrido & M. Aldea Nucleotide sequence of the jpaBCD structural Energy requirements for protein translocation genes of Shigella dysenteriae across the Escherichia coli inner membrane R. Yao & S. Palchaudhuri B. L. Geller Molecular cloning and expression in Occurrence and biological function of Escherichia coli K-12 of the rfb gene cluster cytochrome P450 monooxygenases in the determining the O antigen of an E. coli 0111 actinomycetes strain D. P. O’Keefe & P. A. Harder D. A. Bastin, L. K. Romana & P. R. Reeves Research Articles The sugar-specific outer membrane channel 2107 The products of Rhizobium genes, psi and pss, ScrY contains functional characteristics of which affect exopolysaccharide production, general diffusion pores and substrate-specific are associated with the bacterial cell surface porins J. W. Latchford, D. Borthakur & A. W. B. Johnston K. Schilein, K. Schmid & R. Benz illegitimate integration of non-replicative In vivo analysis of integration of membrane vectors in the genome of Rhodococcus proteins in Escherichia coli fascians upon electrotransformation as an K. Ito & Y. Akiyama insertional mutagenesis system Horizontal transfer of multiple penicillin- J. Desomer, M. Crespi & M. Van Montagu binding protein genes, and capsular Pseudomonas aeruginosa LasB mutant biosynthetic genes, in natural populations of constructed by insertional mutagenesis Streptococcus pneumoniae reveals elastolytic activity due to alkaline T. J. Coffey, C. G. Dowson, M. Daniels, J. Zhou, proteinase and the LasA fragment C. Martin, B. G. Spratt and J. M. Musser C. Wolz, E. Hellstern, M. Haug, D. R. Galloway, M. L. Vasil & G. Déring Cloning of a sequence of Aquaspirillum magnetotacticum that complements the aroD Binding of basement-mem:£rane laminin by gene of Escherichia coli Escherichia coli A. E. Berson, D. V. Hudson & N. S. Waleh K. H. Valkonen, J. Veijola, B. Dagberg & B. E. Uhlin 1S901, a new member of a widespread class of atypical insertion sequences, is associated Molecular cloning, characterization and with pathogenicity in Mycobacterium avium analysis of the regulation of the ARO2 gene, Z. M. Kunze, S. Wall, R. Appelberg, M. T. Silva, F. encoding chorismate synthase, of Portaels & J. J. McFadden Saccharomyces cerevisiae D. G. L. Jones, U. Reusser & G. H. Braus Pleiotropic control of Listeria monocytogenes The bacterial porin superfamily: sequence virulence factors by a gene that is alignment and structure prediction autoregulated D. Jeanteur, J. H. Lakey & F. Pattus J. Mengaud, S. Dramsi, E. Gouin, J. A. Vazquez- Boland & P. Cossart Characterization of two insertion sequences, 1S701 and 1S702, from the cyanobacterium Sequencing, mutational analysis, and Calothrix species PCC 7601 transcriptional regulation of the Escherichia D. Mazel, C. Bernard, R. Schwarz, A. M. Castets, coli htrB gene J. Houmard & N. Tandeau de Marsac M. Karow & C. Georgopoulos