home *** CD-ROM | disk | FTP | other *** search
- **********************************************
- * Oxysterol-binding protein family signature *
- **********************************************
-
- A number of eukaryotic proteins that seem to be involved with sterol synthesis
- and/or its regulation have been found [1] to be evolutionary related:
-
- - Mammalian oxysterol-binding protein (OSBP); a protein of about 800 amino-
- acid residues that binds a variety of oxysterols; oxygenated derivatives of
- cholesterol. OSBP seems to play a complex role in the regulation of sterol
- metabolism.
- - Yeast proteins HES1 and KES1; highly related protein of 434 residues that
- seem to play a role in ergosterol synthesis.
- - Yeast OSH1, a protein of 859 residues that also play a role in ergosterol
- synthesis.
- - Yeast hypothetical protein YKR003w (448 residues).
-
- All these proteins contain a moderately conserved domain of about 250 residues
- which is located in the C-terminal half of OBSP or OSH1 and in the central
- section of the other proteins. As a signature pattern, we selected the best
- conserved part of this domain, a region that contains a perfectly conserved
- pentapeptide.
-
- -Consensus pattern: E-Q-x-S-H-H-P-P-x-[STAC]-A
- -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] Jiang B., Brown J.L., Sheraton J., Fortin N., Bussey H.
- Yeast 10:341-353(1994).
-