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- *************************************
- * LBP / BPI / CETP family signature *
- *************************************
-
- A family of serum glycoproteins that binds to lipids has recently [1,2] been
- recognized. This family groups together:
-
- - Lipopolysaccharide-binding protein (LBP). LBP binds to the lipid A moiety
- of bacterial lipopolysaccharides (LPS), a glycolipid present in the outer
- membrane of all gram-negative bacteria. The LBP/LPS complex seems to
- interact with the CD14 receptor and may be responsible for the secretion of
- alpha-TNF.
- - Bactericidal permeability-increasing protein (BPI). Like LBP, BPI binds LPS
- and has a cytotoxic activity on gram-negative bacteria.
- - Cholesteryl ester transfer protein (CETP). CETP is involved in the transfer
- of insoluble cholesteryl esters in reverse cholesterol transport.
-
- These proteins are structurally related and share many regions of sequence
- similarities. As a signature pattern we have selected one of these regions,
- which is located in the N-terminal section of these proteins; a region which
- could be involved in the binding to the lipids [2].
-
- -Consensus pattern: G-[LIVM](2)-x-R-I-[ST]-x(3)-L-x(5)-[EQ]-x(4)-[LIVM]-Q-
- x(8)-P
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: May 1991 / Text revised.
-
- [ 1] Schumann R.R., Leong S.R., Flaggs G.W., Gray P.W., Wright S.D.,
- Mathison J.C., Tobias P.S., Ulevitch R.J.
- Science 249:1429-1431(1990).
- [ 2] Gray P.W., Flaggs G., Leong S.R., Gumina R.J., Weiss J., Ooi C.E.,
- Elsbach P.
- J. Biol. Chem. 264:9505-9509(1989).
-