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- ******************************************************************
- * Bacterial hexapeptide-repeat containing-transferases signature *
- ******************************************************************
-
- On the basis of sequence similarity, a number of bacterial transferases have
- been proposed [1,2,3,4] to belong to a single family. These proteins are:
-
- - Serine acetyltransferase (EC 2.3.1.30) (SAT) (gene cysE), an enzyme
- involved in cysteine biosynthesis.
- - Azotobacter chroococcum nitrogen fixation protein nifP. NifP is most
- probably a SAT involved in the optimization of nitrogenase activity.
- - Escherichia coli thiogalactoside acetyltransferase (EC 2.3.1.18) (gene
- lacA), an enzyme involved in the biosynthesis of lactose.
- - UDP-N-acetylglucosamine acyltransferase (EC 2.3.1.129) (gene lpxA), an
- enzyme involved in the biosynthesis of lipid A, a phosphorylated glycolipid
- that anchors the lipopolysaccharide to the outer membrane of the cell.
- - UDP-3-O-[3-hydroxymyristoyl] glucosamine N-acyltransferase (EC 2.3.1.-)
- (gene lpxD or firA), which is also involved in the biosynthesis of lipid A.
- - Chloramphenicol acetyltransferase (CAT) (EC 2.3.1.28) from Agrobacterium
- tumefaciens, Bacillus sphaericus, Escherichia coli plasmid IncFII NR79,
- Pseudomonas aeruginosa, Staphylococcus aureus plasmid pIP630. These CAT are
- not evolutionary related to the main family of CAT (see the relevant
- section).
- - Rhizobium nodulation protein nodL. NodL is an acetyltransferase involved in
- the O-acetylation of Nod factors.
- - Escherichia coli succinyldiaminopimelate aminotransferase (EC 2.6.1.17)
- (gene dapD) which catalyzes the third step in the biosynthesis of
- diaminopimelate and lysine from aspartate semialdehyde.
- - Escherichia coli N-acetylglucosamine-1-phosphate uridyltransferase
- (EC 2.7.7.23) (gene glmU), an enzyme involved in the biosynthesis of the
- peptidoglycan.
- - Bacillus tms protein, which is highly similar to Escherichia coli glmU.
-
- These proteins have been shown [3,4] to contain a repeat structure composed of
- tandem repeats of a [LIV]-G-x(4) hexapeptide. Our signature pattern is based
- on a fourfold repeat of this hexapeptide.
-
- -Consensus pattern: [LIV]-[GAED]-x(2)-[STAV]-x-[LIV]-x(3)-[LIVAC]-x-[LIV]-
- [GAED]-x(2)-[STAV]-x-[LIV]-[GAED]-x(2)-[STAV]-x-[LIV]-
- x(3)-[LIV]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: human elastin.
-
- -Expert(s) to contact by email: Roy P.H.
- 2020000@saphir.ulaval.ca
-
- -Last update: June 1994 / Pattern and text revised.
-
- [ 1] Downie J.A.
- Mol. Microbiol. 3:1649-1651(1989).
- [ 2] Parent R., Roy P.H.
- J. Bacteriol. 174:2891-2897(1992).
- [ 3] Vaara M.
- FEMS Microbiol. Lett. 97:249-254(1992).
- [ 4] Vuorio R., Haerkonen T., Tolvanen M., Vaara M.
- FEBS Lett. 337:289-292(1994).
-