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- *******************************************
- * OHHL biosynthesis luxI family signature *
- *******************************************
-
- N-(3-oxohexanoyl)-L-homoserine lactone (OHHL) is a molecule produced by a
- number of gram-negative bacteria that acts as an autoinducer by binding to
- transcriptional regulatory proteins and activating them [1]. OHHL is produced
- by a family of related proteins which is known as the luxI family and which
- currently consist of the following members:
-
- - luxI from Vibrio fischeri. The target of OHHL is the luxR protein that acts
- in the regulation of bioluminescence genes.
- - carI from Erwinia carotovora. The target of OHHL is carR which activates
- genes involved in the biosynthesis of carbapenem antibiotics.
- - eagI from Enterobacter agglomerans. The target of OHHL is not yet known.
- - expI from Erwinia carotovora. The target of OHHL is expR which is involved
- in virulence (soft rot disease) by activating the genes for plant tissue
- macerating enzymes.
- - lasI from Pseudomonas aeruginosa. The target of OHHL is lasR which
- activates the transcription of the elastase gene.
- - traI from Agrobacterium tumefaciens. The target of OHHL is traR which
- regulates Ti plasmid transfer.
-
- Proteins from the luxI family contains from 193 to 217 amino acids. The best
- conserved region is located in the N-terminal region and can be used as a
- signature pattern.
-
- -Consensus pattern: L-R-x(3)-F-x(2)-R-x(2)-W-x-[LIVM]-x(6)-E-x-D-x-[FY]-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 / First entry.
-
- [ 1] Swift S., Winson M.K., Chan P.F., Bainton N.J., Birdsall M., Reeves P.J.,
- Rees C.E.D., Chhabra S.R., Hill P.J., Throup J.P., Bycroft B.W.,
- Salmond G.P.C., Williams P., Stewart G.S.A.B.
- Mol. Microbiol. 10:511-520(1993).
-