home *** CD-ROM | disk | FTP | other *** search
- ***************************************************
- * Gram-negative pili assembly chaperone signature *
- ***************************************************
-
- Most Gram-negative bacteria possess on their surface, a supramolecular
- structure, the pili, that mediates attachment to specific receptors. The
- assembly of the pili requires the function of specialized periplasmic
- chaperones [1,2]. These proteins are structurally and possibly evolutionary
- related to the immunoglobulin family. Known members of this family are listed
- below:
-
- - Escherichia coli papD for P pili.
- - Escherichia coli f17-D for F17 pili.
- - Escherichia coli faeE for K88 pili.
- - Escherichia coli fanE for K99 pili.
- - Escherichia coli fimC for type 1 fimbriae.
- - Escherichia coli sfaE for S pili.
- - Escherichia coli clpE for CS31A capsule-like antigen.
- - Escherichia coli ecpD for a yet unknown pilin [3].
- - Bordetella pertussis fhaD (or fimB) for filamentous hemagglutinin and
- fimbria.
- - Haemophilus influenzae hifB for type b pili.
- - Klebsiella pneumoniae mrkB for type 3 pili.
- - Salmonella enteritidis sefB for sefA.
- - Yersinia enterocolitica myfB for myfA.
- - Yersinia pestis caf1M for F1 capsule antigen.
- - Yersinia pestis psaB for pH6 antigen.
- - Escherichia coli hypothetical protein yehC.
-
- Structurally, these proteins consist of two globular domains that have a
- topology identical to an immunoglobulin fold. As a signature pattern, we
- selected a highly conserved region located in the C-terminal section of the
- first globular domain.
-
- -Consensus pattern: [LIVMFY]-[APN]-x-[DN]-[KRE]-E-[STR]-[LIVMA]-x-[FYWT]-x-
- [NC]-[LIVM]-x(2)-[LIVM]-P-[PAS]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: June 1994 / Pattern and text revised.
-
- [ 1] Holmgren A., Kuehn M.J., Branden C.-I., Hultgren S.J.
- EMBO J. 11:1617-1622(1992).
- [ 2] Jacob-Dubuisson F., Kuehn M.J., Hultgren S.J.
- Trends Microbiol. 1:50-55(1993).
- [ 3] Raina S., Missiakas D., Baird L., Kumar S., Georgopoulos C.
- J. Bacteriol. 175:5009-5021(1993).
-