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- **********************************************************
- * Bacterial type II secretion system protein E signature *
- **********************************************************
-
- A number of bacterial proteins, some of which are involved in a general
- secretion pathway (GSP) for the export of proteins (also called the type II
- pathway) [1,2], have been found to be evolutionary related. These proteins
- are listed below:
-
- - The 'E' protein from the GSP operon of: Aeromonas hydrophila (gene exeE);
- Erwinia chrysanthemi and carotovora (gene outE); Klebsiella pneumoniae
- (gene pulE); Pseudomonas aeruginosa (gene xcpR); Vibrio cholera (gene epsE)
- and Xanthomonas campestris (gene xpsE).
- - Agrobacterium tumefaciens Ti plasmid virB operon protein 11. This protein
- is required for the transfer of T-DNA to plants.
- - Bacillus subtilis comG operon protein 1 which is required for the uptake of
- DNA by competent Bacillus subtilis cells.
- - Pseudomonas aeruginosa protein pilB, which is essential for the formation
- of the pili.
- - Pseudomonas aeruginosa protein twitching mobility protein pilT.
- - Neisseria gonorrhoeae type IV pilus assembly protein pilF.
- - Vibrio cholerae tcp pilus secretion protein tcpF.
- - Escherichia coli protein hopB.
-
- These proteins have from 344 (pilT and virB11) to 566 (pilB) amino acids, they
- are probably cytoplasmically located and, on the basis of the presence of a
- conserved P-loop region, probably bind ATP. As a signature pattern we selected
- a region that overlaps the 'B' motif of ATP-binding proteins.
-
- -Consensus pattern: [LIVM]-R-x(2)-P-D-x-[LIVM](3)-G-E-[LIVM]-R-D
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: June 1994 / Text revised.
-
- [ 1] Salmond G.P.C., Reeves P.J.
- Trends Biochem. Sci. 18:7-12(1993).
- [ 3] Hobbs M., Mattick J.S.
- Mol. Microbiol. 10:233-243(1993).
-