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- * Gas vesicles protein GVPc repeated domain signature *
- *******************************************************
-
- Gas vesicles are small, hollow, gas filled protein structures found in several
- cyanobacterial and archaebacterial microorganisms [1]. They allow the
- positioning of the bacteria at the favorable depth for growth. Gas vesicles
- are hollow cylindrical tubes, closed by a hollow, conical cap at each end.
- Both the conical end caps and central cylinder are made up of 4-5 nm wide
- ribs that run at right angles to the long axis of the structure. Gas vesicles
- seem to be constituted of two different protein components: GVPa and GVPc.
-
- GVPc is a minor constituent of gas vesicles and seems to be located on the
- outer surface. Structurally, cyanobacterial GVPc consists of four or five
- tandem repeats of a 33 residue sequence flanked by sequences of 18 and 10
- residues at the N- and C-termini, respectively.
-
- We derived a signature pattern for the repeated domain. This signature spans
- positions 11 to 33 of that domain.
-
- -Consensus pattern: F-L-x(2)-T-x(3)-R-x(3)-A-x(2)-Q-x(3)-L-x(2)-F
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Note: this pattern is not designed to detect archaebacterial GVPc [2] which
- is composed of 8 tandem repeats of a sequence very distantly (if at all)
- related to that of cyanobacterial GVPc.
-
- -Last update: June 1992 / Text revised.
-
- [ 1] Walsby A.E., Hayes P.K.
- Biochem. J. 264:313-322(1989).
- [ 2] Jones J.G., Young D.C., Dassarma S.
- Gene 102:117-122(1991).
-