Expression and characterization of recombinant human acyloxyacyl hydrolase, a leukocyte enzyme that deacylates bacterial lipopolysaccharides - PubMed (original) (raw)

. 1991 Aug 27;30(34):8415-23.

doi: 10.1021/bi00098a020.

Affiliations

Expression and characterization of recombinant human acyloxyacyl hydrolase, a leukocyte enzyme that deacylates bacterial lipopolysaccharides

F S Hagen et al. Biochemistry. 1991.

Abstract

The molecular cloning and eukaryotic cell expression of the complementary DNA for human neutrophil acyloxyacyl hydrolase (AOAH) are described. AOAH is a leukocyte enzyme that selectively removes the secondary (acyloxyacyl-linked) fatty acyl chains from the lipid A region of bacterial lipopolysaccharides (endotoxins), thereby detoxifying the molecules. The two disulfide-linked subunits of the enzyme are encoded by a single mRNA. The amino acid sequence of the protein contains a lipase consensus sequence in the large subunit and a region in the small subunit that is similar to the saposins, cofactors for sphingolipid hydrolases. The recombinant enzyme, like native AOAH, hydrolyzes secondary acyl chains from more than one position on the lipopolysaccharide backbone. Acyloxyacyl hydrolase is a novel two-component lipase that, by deacylating lipopolysaccharides, may modulate host inflammatory responses to Gram-negative bacterial invasion.

PubMed Disclaimer

Similar articles

Cited by

Publication types

MeSH terms

Substances

LinkOut - more resources