A Predatory Patchwork: Membrane and Surface Structures of Bdellovibrio bacteriovorus

Advances in Microbial Physiology

Volumn 54, Issue , 2008, Pages 313-361

  Lambert, Carey ^a   Hobley, Laura ^a   Chang, Chien Yi ^a   Fenton, Andrew ^a   Capeness, Michael ^a   Sockett, Liz ^a  

^a UNIVERSITY OF NOTTINGHAM   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

CARBOXYPEPTIDASE; HYDROLASE; MEMBRANE PROTEIN; PROTEINASE;

BACTERIAL CELL; BACTERIAL GENE; BACTERIAL GENOME; BACTERIUM PILUS; BDELLOVIBRIO BACTERIOVORUS; BIOSYNTHESIS; CELL MEMBRANE; CELL SURFACE; CELL WALL; CHEMOTAXIS; ENZYME ACTIVITY; FLAGELLUM; FLIC GENE; GENE EXPRESSION; GENETIC COMPLEMENTATION; GENOME ANALYSIS; GRAM NEGATIVE BACTERIUM; MCP2 GENE; MOLECULAR GENETICS; NONHUMAN; PREDATION; PREY; REVIEW; SURFACE PROPERTY;

BACTERIAL OUTER MEMBRANE PROTEINS; BDELLOVIBRIO; FIMBRIAE, BACTERIAL; FLAGELLA;

BDELLOVIBRIO; BDELLOVIBRIO BACTERIOVORUS; NEGIBACTERIA;

EID: 52949139865     PISSN: 00652911     EISSN: None     Source Type: Book Series    
DOI: 10.1016/S0065-2911(08)00005-2     Document Type: Review

References (107)

1. Abram D., and Davis B.K. Structural properties and features of parasitic Bdellovibrio-bacteriovorus. J. Bacteriol. 104 (1970) 948-948
2. Barabote R.D., Rendulic S., Schuster S.C., and Saier Jr. M.H. Comprehensive analysis of transport proteins encoded within the genome of Bdellovibrio bacteriovorus. Genomics 90 (2007) 424-446
3. Barel G., Sirota A., Volpin H., and Jurkevitch E. Fate of predator and prey proteins during growth of Bdellovibrio bacteriovorus on Escherichia coli and Pseudomonas syringae prey. J. Bacteriol. 187 (2005) 329-335
4. Beck S., Schwudke D., Strauch E., Appel B., and Linscheid M. Bdellovibrio bacteriovorus strains produce a novel major outer membrane protein during predacious growth in the periplasm of prey bacteria. J. Bacteriol. 186 (2004) 2766-2773
5. Beck S., Schwudke D., Appel B., Linscheid M., and Strauch E. Characterization of outer membrane protein fractions of Bdellovibrionales. FEMS Microbiol. Lett. 243 (2005) 211-217
6. Bischoff E.R., and Ponstingl H. Catalysis of guanine nucleotide exchange on ran by the mitotic regulator RCC1. Nature 354 (1991) 80-82
7. Blattner F.R., Plunkett III G., Bloch C.A., Perna N.T., Burland V., Riley M., Collado-Vides J., Glasner J.D., Rode C.K., Mayhew G.F., Gregor J., Davis N.W., Kirkpatrick H.A., Goeden M.A., Rose D.J., Mau B., and Shao Y. The complete genome sequence of Escherichia coli K-12. Science 277 (1997) 1453-1474
8. Bork P., and Beckmann G. The CUB domain. A widespread module in developmentally regulated proteins. J. Mol. Biol. 231 (1993) 539-545
9. Burnham J.C., Hashimot T., and Conti S.F. Electron microscopic observations on penetration of Bdellovibrio bacteriovorus into gram-negative bacterial hosts. J. Bacteriol. 96 (1968) 1366-1366
10. Charbonneau M.E., Berthiaume F., and Mourez M. Proteolytic processing is not essential for multiple functions of the Escherichia coli autotransporter adhesin involved in diffuse adherence (AIDA-I). J. Bacteriol. 188 (2006) 8504-8512
11. Chauhan A., and Williams H.N. Response of Bdellovibrio and like organisms (BALOs) to the migration of naturally occurring bacteria to chemoattractants. Curr. Microbiol. 53 (2006) 516-522
12. Cotter S.E., Surana N.K., and Geme III J.W.S. Trimeric autotransporters: a distinct subfamily of autotransporter proteins. Trends in Microbiol. 13 (2005) 199-205
13. Cotter S.E., Surana N.K., Grass S., and Geme J.W.S. Trimeric autotransporters require trimerization of the passenger domain for stability and adhesive activity. J. Bacteriol. 188 (2006) 5400-5407
14. Cover W.H., and Rittenberg S.C. Change in the surface hydrophobicity of substrate cells during bdelloplast formation by bdellovibrio-bacteriovorus-109j. J. Bacteriol. 157 (1984) 391-397
15. Desvaux M., Parham N.J., and Henderson I.R. The autotransporter secretion system. Res. Microbiol. 155 (2004) 53-60
16. Diedrich D.L., Duran C.P., and Conti S.F. Acquisition of escherichia-coli outer-membrane proteins by Bdellovibrio Sp strain-109d. J. Bacteriol. 159 (1984) 329-334
17. El Tahir Y., and Skurnik M. YadA, the multifaceted Yersinia adhesin. Int. J. Med. Microbiol. 291 (2001) 209-218
18. Evans K.J., Lambert C., and Sockett R.E. Predation by Bdellovibrio bacteriovorus HD100 requires type IV pili. J Bacteriol. 189 (2007) 4850-4859
19. Ferrandez A., Hawkins A.C., Summerfield D.T., and Harwood C.S. Cluster II che genes from pseudomonas aeruginosa are required for an optimal chemotactic response. J Bacteriol. 184 (2002) 4374-4383
20. Flannagan R.S., Valvano M.A., and Koval S.F. Downregulation of the motA gene delays the escape of the obligate predator Bdellovibrio bacteriovorus 109J from bdelloplasts of bacterial prey cells. Microbiology-Sgm 150 (2004) 649-656
21. Forest K.T., and Tainer J.A. Type-4 pilus-structure: outside to inside and top to bottom - a minireview. Gene 192 (1997) 165-169
22. Garcia N., Campos A., Osorio A., Poggio S., Gonzalez-Pedrajo B., Camarena L., and Dreyfus G. The flagellar switch genes fliM and fliN of Rhodobacter sphaeroides are contained in a large flagellar gene cluster. J Bacteriol. 180 (1998) 3978-3982
23. Gulbins E., Dreschers S., Wilker B., and Grassme H. Ceramide, membrane rafts and infections. J Mol Med. 82 (2004) 357-363
24. Henderson I.R., and Nataro J.P. Virulence functions of autotransporter proteins. Infect. Immun. 69 (2001) 1231
25. Henderson I.R., Navarro-Garcia F., and Nataro J.P. The great escape: structure and function of the autotransporter proteins. Trends Microbiol. 6 (1998) 370-378
26. Henderson B., Nair S.P., Ward J.M., and Wilson M. Molecular pathogenicity of the oral opportunistic pathogen actinobacillus actinomycetemcomitans. Ann. Rev. Microbiol. 57 (2003) 29-55
27. Henderson I.R., Navarro-Garcia F., Desvaux M., Fernandez R.C., and Ala'Aldeen D. Type V protein secretion pathway: the autotransporter story. Microbiol. Mol. Biol. Rev. 68 (2004) 692-744
28. Herve M., Boniface A., Gobec S., Blanot D., and Mengin-Lecreulx D. Biochemical characterization and physiological properties of Escherichia coli UDP-N-acetylmuramate:L-alanyl-gamma-D-glutamyl-meso-diaminopimelate ligase. J. Bacteriol. 189 (2007) 3987-3995
29. Hespell R.B., Thomasho M.F., and Rittenbe S.C. Changes in cell composition and viability of Bdellovibrio-Bacteriovorus during starvation. Arch. Microbiol. 97 (1974) 313-327
30. Hobbs M., Collie E.S., Free P.D., Livingston S.P., and Mattick J.S. PilS and PilR, a two-component transcriptional regulatory system controlling expression of type 4 fimbriae in Pseudomonas aeruginosa. Mol. Microbiol. 7 (1993) 669-682
31. Hobley L., King J.R., and Sockett R.E. Bdellovibrio predation in the presence of decoys: three-way bacterial interactions revealed by mathematical and experimental analyses. Appl. Environ. Microbiol. 72 (2006) 6757-6765
32. Hoiczyk E., Roggenkamp A., Reichenbecher M., Lupas A., and Heesemann J. Structure and sequence analysis of Yersinia YadA and Moraxella UspAs reveal a novel class of adhesins. Embo J. 19 (2000) 5989-5999
33. Holtje J.V. Growth of the stress-bearing and shape-maintaining murein sacculus of Escherichia coli. Microbiol. Mol. Biol. Rev. 62 (1998) 181-203
34. Hulo N., Bairoch A., Bulliard V., Cerutti L., De Castro E., Langendijk-Genevaux P.S., Pagni M., and Sigrist C.J.A. The prosite database. Nucleic Acids Res. 34 (2006) D227-D230
35. Ikushiro H., Islam M.M., Tojo H., and Hayashi H. Molecular characterization of membrane-associated soluble serine palmitoyltransferases from Sphingobacterium multivorum and Bdellovibrio stolpii. J. Bacteriol. 189 (2007) 5749-5761
36. Jacob-Dubuisson F., Fernandez R., and Coutte L. Protein secretion through autotransporter and two-partner pathways. Biochemica et Biophysica Acta 1694 (2004) 235-257
37. Jain S., and Goldberg M.B. Requirement for YaeT in the outer membrane assembly of autotransporter proteins. J. Bacteriol. 189 (2007) 5393-5398
38. Jayasimhulu K., Hunt S.M., Kaneshiro E.S., Watanabe Y., and Giner J.L. Detection and identification of Bacteriovorax stolpii UKi2 Sphingophosphonolipid molecular species. J. Am. Soc. Mass Spectrom 18 (2007) 394-403
39. Kim D.S.H., Chao Y., and Saier M.H. Protein-translocating trimeric autotransporters of gram-negative bacteria. J. Bacteriol. 188 (2006) 5655-5667
40. Koebnik R., Locher K.P., and Van Gelder P. Structure and function of bacterial outer membrane proteins: barrels in a nutshell. Mol. Microbiol. 37 (2000) 239-253
41. Kostakioti M., and Stathopoulos C. Role of the alpha-helical linker of the C-terminal translocator in the biogenesis of the serine protease subfamily of autotransporters. Infect. Immun. 74 (2006) 4961-4969
42. Kostakioti M., Newman C.L., Thanassi D.G., and Stathopoulos C. Mechanisms of protein export across the bacterial outer membrane. J. Bacteriol. 187 (2005) 4306-4314
43. Kuenen J.G., and Rittenberg S.C. Incorporation of long-chain fatty-acids of substrate organism by Bdellovibrio-Bacteriovorus during intraperiplasmic growth. J. Bacteriol. 121 (1975) 1145-1157
44. Lamarre A.G., Straley S.C., and Conti S.F. Chemotaxis toward amino-acids by Bdellovibrio-bacteriovorus. J. Bacteriol. 131 (1977) 201-207
45. Lambert C., Smith M.C.M., and Sockett R.E. A novel assay to monitor predator-prey interactions for Bdellovibrio bacteriovorus 109 J reveals a role for methyl-accepting chemotaxis proteins in predation. Environ. Microbiol. 5 (2003) 127-132
46. Lambert C., Evans K.J., Till R., Hobley L., Capeness M., Rendulic S., Schuster S.C., Aizawa S.I., and Sockett R.E. Characterizing the flagellar filament and the role of motility in bacterial prey-penetration by Bdellovibrio bacteriovorus. Mol. Microbiol. 60 (2006) 274-286
47. Leahy D.J., Hendrickson W.A., Aukhil I., and Erickson H.P. Structure of a fibronectin type-iii domain from tenascin phased by mad analysis of the selenomethionyl protein. Science 258 (1992) 987-991
48. Leahy D.J., Aukhil I., and Erickson H.P. 2.0 angstrom crystal structure of a four-domain segment of human fibronectin encompassing the RGD loop and synergy region. Cell 84 (1996) 155-164
49. Letunic I., Copley R.R., Pils B., Pinkert S., Schultz J., and Bork P. SMART 5: domains in the context of genomes and networks. Nucleic Acids Res. 34 (2006) D257-D260
50. Lloyd S.A., Tang H., Wang X., Billings S., and Blair D.F. Torque generation in the flagellar motor of Escherichia coli: evidence of a direct role for FliG but not for FliM or FliN. J. Bacteriol. 178 (1996) 223-231
51. Maier B., Potter L., So M., Long C.D., Seifert H.S., and Sheetz M.P. Single pilus motor forces exceed 100 pN. Proc. Natl. Acad. Sci. U. S. A. 99 (2002) 16012-16017
52. Mattick J.S. Type IV pili and twitching motility. Ann. Rev. Microbiol. 56 (2002) 289-314
53. McClelland M., Sanderson K.E., Spieth J., Clifton S.W., Latreille P., Courtney L., Porwollik S., Ali J., Dante M., Du F., Hou S., Layman D., Leonard S., Nguyen C., Scott K., Holmes A., Grewal N., Mulvaney E., Ryan E., Sun H., Florea L., Miller W., Stoneking T., Nhan M., Waterston R., and Wilson R.K. Complete genome sequence of Salmonella enterica serovar Typhimurium LT2. Nature 413 (2001) 852-856
54. Meng G.Y., Surana N.K., St Geme J.W., and Waksman G. Structure of the outer membrane translocator domain of the haemophilus influenzae Hia trimeric autotransporter. Embo J. 25 (2006) 2297-2304
55. Merz A.J., So M., and Sheetz M.P. Pilus retraction powers bacterial twitching motility. Nature 407 (2000) 98-102
56. Muff T.J., and Ordal G.W. Assays for CheC, FliY, and CheX as representatives of response regulator phosphatases. Methods Enzymol. 423 (2007) 336-348
57. Nelson D.R., and Rittenberg S.C. Partial characterization of lipid-a of intraperiplasmically grown Bdellovibrio-Bacteriovorus. J. Bacteriol. 147 (1981) 869-874
58. Nelson D.R., and Rittenberg S.C. Incorporation of substrate cell lipid-a components into the lipopolysaccharide of intraperiplasmically grown Bdellovibrio-Bacteriovorus. J. Bacteriol. 147 (1981) 860-868
59. Nika J.R., Latimer J.L., Ward C.K., Blick R.J., Wagner N.J., Cope L.D., Mahairas G.G., Munson Jr. R.S., and Hansen E.J. Haemophilus ducreyi requires the flp gene cluster for microcolony formation in vitro. Infect. Immun. 70 (2002) 2965-2975
60. Nummelin H., Merckel M.C., Leo J.C., Lankinen H., Skurnik M., and Goldman A. The Yersinia adhesin YadA collagen-binding domain structure is a novel left-handed parallel beta-roll. EMBO J. 23 (2004) 701-711
61. Olsen I., and Jantzen E. Sphingolipids in bacteria and fungi. Anaerobe 7 (2001) 103-112
62. Oomen C.J., van Ulsen P., Van Gelder P., Feijen M., Tommassen J., and Gros P. Structure of the translocator domain of a bacterial autotransporter. Embo J. 23 (2004) 1257-1266
63. Pallen M.J., Chaudhuri R.R., and Henderson I.R. Genomic analysis of secretion systems. Curr. Opin. Microbiol. 6 (2003) 519-527
64. Parge H.E., Forest K.T., Hickey M.J., Christensen D.A., Getzoff E.D., and Tainer J.A. Structure of the fibre-forming protein pilin at 2.6 A resolution. Nature 378 (1995) 32-38
65. Pohlner J., Halter R., Beyreuther K., and Meyer T.F. Gene structure and extracellular secretion of Neisseria-Gonorrhoeae Iga protease. Nature 325 (1987) 458-462
66. Popham D.L., and Young K.D. Role of penicillin-binding proteins in bacterial cell morphogenesis. Curr. Opin. Microbiol. 6 (2003) 594-599
67. Priyadarshini R., Popham D.L., and Young K.D. Daughter cell separation by penicillin-binding proteins and peptidoglycan amidases in Escherichia coli. J. Bacteriol. 188 (2006) 5345-5355
68. Renault L., Nassar N., Vetter I., Becker J., Klebe C., Roth M., and Wittinghofer A. The 1.7 A crystal structure of the regulator of chromosome condensation (RCC1) reveals a seven-bladed propeller. Nature 392 (1998) 97-101
69. Rendulic S., Jagtap P., Rosinus A., Eppinger M., Baar C., Lanz C., Keller H., Lambert C., Evans K.J., Goesmann A., Meyer F., Sockett R.E., and Schuster S.C. A predator unmasked: life cycle of Bdellovibrio bacteriovorus from a genomic perspective. Science 303 (2004) 689-692
70. Roggenkamp A., Ackermann N., Jacobi C.A., Truelzsch K., Hoffmann H., and Heesemann J. Molecular analysis of transport and oligomerization of the Yersinia enterocolitica adhesin YadA. J. Bacteriol. 185 (2003) 3735-3744
71. Schelling M., and Conti S. Host receptor-sites involved in the attachment of Bdellovibrio-Bacteriovorus and Bdellovibrio-Stolpii. FEMS Microbiol. Lett. 36 (1986) 319-323
72. Scherff R.H., Devay J.E., and Carroll T.W. Ultrastructure of host-parasite relationships involving reproduction of Bdellovibrio Bacteriovorus in host bacteria. Phytopathology 56 (1966) 627-627
73. Schultz J., Milpetz F., Bork P., and Ponting C.P. SMART, a simple modular architecture research tool: identification of signaling domains. Proc. Natl. Acad. Sci. U. S. A. 95 (1998) 5857-5864
74. Schwudke D., Linscheid M., Strauch E., Appel B., Zahringer U., Moll H., Muller M., Brecker L., Gronow S., and Lindner B. The obligate predatory Bdellovibrio bacteriovorus possesses a neutral lipid A containing alpha-D-mannoses that replace phosphate residues-Similarities and differences between the lipid As and the lipopolysaccharides of the wild type strain B-bacteriovorus HD100 and its host-independent derivative HI100. J. Biol. Chem. 278 (2003) 27502-27512
75. Schwudke D., Bernhardt A., Beck S., Madela K., Linscheid M.W., Appel B., and Strauch E. Transcriptional activity of the host-interaction locus and a putative pilin gene of Bdellovibrio bacteriovorus in the predatory life cycle. Curr. Microbiol. 51 (2005) 310-316
76. Seidler R.J., and Starr M.P. Structure of flagellum of Bdellovibrio bacteriovorus. J. Bacteriol. 95 (1968) 1952-1952
77. Seki T., Hayashi N., and Nishimoto T. RCC1 in the ran pathway. J. Biochem. 120 (1996) 207-214
78. Shilo M. Morphological and physiological aspects of the interaction of Bdellovibrio with host bacteria. Curr. Top. Microbiol. Immunol. 50 (1969) 174-204
79. Skerker J.M., and Berg H.C. Direct observation of extension and retraction of type IV pili. Proc. Natl. Acad. Sci. U.S.A. 98 (2001) 6901-6904
80. Skerker J.M., and Shapiro L. Identification and cell cycle control of a novel pilus system in Caulobacter crescentus. Embo J. 19 (2000) 3223-3234
81. Smith C.A. Structure, function and dynamics in the mur family of bacterial cell wall ligases. J. Mol. Biol. 362 (2006) 640-655
82. Stein M.A., McAllister S.A., Torian B.E., and Diedrich D.L. Acquisition of apparently intact and unmodified lipopolysaccharides from Escherichia-Coli by Bdellovibrio-Bacteriovorus. J. Bacteriol. 174 (1992) 2858-2864
83. Steiner S., Conti S.F., and Lester R.L. Occurrence of phosphonosphingolipids in Bdellovibrio-Bacteriovorus strain Uki2. J. Bacteriol. 116 (1973) 1199-1211
84. Stolz B., and Berg H.C. Evidence for interactions between MotA and MotB, torque-generating elements of the flagellar motor of Escherichia coli. J. Bacteriol. 173 (1991) 7033-7037
85. Straley S.C., and Conti S.F. Chemotaxis in Bdellovibrio bacteriovorus. J. Bacteriol. 120 (1974) 549-551
86. Straley S.C., and Conti S.F. Chemotaxis by Bdellovibrio-Bacteriovorus toward prey. J. Bacteriol. 132 (1977) 628-640
87. Straley S.C., Lamarre A.G., Lawrence L.J., and Conti S.F. Chemotaxis of Bdellovibrio-Bacteriovorus toward pure compounds. J. Bacteriol. 140 (1979) 634-642
88. Styer K.L., Hopkins G.W., Schesser Bartra S., Plano G.V., Frothingham R., and Aballay A. Yersinia pestis kills Caenorhabditis elegans by a biofilm-independent process that involves novel virulence factors. EMBO Rep. 6 (2005) 992-997
89. Suhr M., Benz I., and Schmidt M.A. Processing of the AIDA-I precursor: removal of AIDA(c) and evidence for the outer membrane anchoring as a beta-barrel structure. Mol. Microbiol. 22 (1996) 31-42
90. Talley B.G., McDade R.L., and Diedrich D.L. Verification of the protein in the outer-membrane of Bdellovibrio-Bacteriovorus as the Ompf protein of its Escherichia-Coli prey. J. Bacteriol. 169 (1987) 694-698
91. Thomashow M.F., and Rittenberg S.C. Intraperiplasmic growth of Bdellovibrio-Bacteriovorus 109j-solubilization of Escherichia-Coli peptidoglycan. J. Bacteriol. 135 (1978) 998-1007
92. Thomashow M.F., and Rittenberg S.C. Penicillin-induced formation of osmotically stable spheroplasts in nongrowing Bdellovibrio bacteriovorus. J. Bacteriology 133 (1978) 1484-1491
93. Thomashow M.F., and Rittenberg S.C. Intraperiplasmic growth of Bdellovibrio bacteriovorus 109J: solubilization of Escherichia coli peptidoglycan. J. Bacteriol. 135 (1978) 998-1007
94. Thomashow L.S., and Rittenberg S.C. Waveform analysis and structure of flagella and basal complexes from Bdellovibrio bacteriovorus 109J. J. Bacteriol. 163 (1985) 1038-1046
95. Thomashow L.S., and Rittenberg S.C. Isolation and composition of sheathed flagella from Bdellovibrio-Bacteriovorus-109j. J. Bacteriol. 163 (1985) 1047-1054
96. Thomashow L.S., and Rittenberg S.C. Waveform analysis and structure of flagella and basal complexes from Bdellovibrio-Bacteriovorus-109j. J. Bacteriol. 163 (1985) 1038-1046
97. Tudor J.J., and Karp M.A. Translocation of an outer-membrane protein into prey cytoplasmic membranes by Bdellovibrios. J. Bacteriol. 176 (1994) 948-952
98. Turner L.R., Lara J.C., Nunn D.N., and Lory S. Mutations in the consensus ATP-binding sites of XcpR and PilB eliminate extracellular protein secretion and pilus biogenesis in Pseudomonas aeruginosa. J. Bacteriol. 175 (1993) 4962-4969
99. van Straaten K.E., Dijkstra B.W., Vollmer W., and Thunnissen A.M. Crystal structure of MltA from Escherichia coli reveals a unique lytic transglycosylase fold. J. Mol. Biol. 352 (2005) 1068-1080
100. van Ulsen P., and Tommassen J. Protein secretion and secreted proteins in pathogenic Neisseriaceae. FEMS Microbiol. Rev. 30 (2006) 292-319
101. Vollmer W., and Bertsche U. Murein (peptidoglycan) structure, architecture and biosynthesis in Escherichia coli. Biochim. Biophys. Acta (2007)
102. Wadhams G.H., and Armitage J.P. Making sense of it all: bacterial chemotaxis. Nat. Rev. Mol. Cell Biol. 5 (2004) 1024-1037
103. Wang Y., and Chen C. Mutation analysis of the flp operon in Actinobacillus actinomycetemcomitans. Gene 351 (2005) 61-71
104. Wang Y., Shi W., Chen W., and Chen C. Type IV pilus gene homologs pilABCD are required for natural transformation in Actinobacillus actinomycetemcomitans. Gene 312 (2003) 249-255
105. Watanabe Y., Nakajima M., Hoshino T., Jayasimhulu K., Brooks E.E., and Kaneshiro E.S. A novel sphingophosphonolipid head group 1-hydroxy-2-aminoethyl phosphonate in Bdellovibrio stolpii. Lipids 36 (2001) 513-519
106. Wu S.S., and Kaiser D. Genetic and functional evidence that Type IV pili are required for social gliding motility in Myxococcus xanthus. Mol. Microbiol. 18 (1995) 547-558
107. Yen M.R., Peabody C.R., Partovi S.M., Zhai Y., Tseng Y.H., and Saier J.M.H. Protein-translocating outer membrane porins of gram-negative bacteria. Biochemica et Biophysica Acta 1562 (2002) 6