Structural highlights
Function
[CAP18_RABIT] CAP18 binds to the lipid A moiety of bacterial lipopolysaccharides (LPS), a glycolipid present in the outer membrane of all Gram-negative bacteria. Has antibiotic activity.
Publication Abstract from PubMed
We have employed the circular dichroism (CD) technique to characterize the solution structure of CAP18(106-137), a lipopolysaccharide (LPS) binding, antimicrobial protein, and its interaction with lipid A. Our results revealed that CAP18(106-137) may exist in at least three lipid A concentration-dependent, primarily helix conformations. The 'model' structure of CAP18(106-137) in 30% (v/v) TFE, determined by nuclear magnetic resonance (NMR) technique, was found to be a complete and very rigid helix. In this conformation, the cationic and hydrophobic groups of CAP18(106-137) are separated into patches and stripes in such a way that it can favorably interact with lipid A through either coulombic interaction with the diphosphoryl groups or hydrophobic interaction with the fatty acyl chains.
The solution structure of the active domain of CAP18--a lipopolysaccharide binding protein from rabbit leukocytes.,Chen C, Brock R, Luh F, Chou PJ, Larrick JW, Huang RF, Huang TH FEBS Lett. 1995 Aug 14;370(1-2):46-52. PMID:7649303[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Chen C, Brock R, Luh F, Chou PJ, Larrick JW, Huang RF, Huang TH. The solution structure of the active domain of CAP18--a lipopolysaccharide binding protein from rabbit leukocytes. FEBS Lett. 1995 Aug 14;370(1-2):46-52. PMID:7649303
