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Both LCCL-domains of human CRISPLD2 have high affinity for lipid A.

Abstract
The LCCL-domain is a recently defined protein module present in diverse extracellular multidomain proteins. Practically nothing is known about the molecular function of these domains; based on functional features of proteins harboring LCCL-domains it has been suggested that these domains might function as lipopolysaccharide-binding domains. Here we show that the two LCCL-domains of human CRISPLD2 protein, a lipopolysaccharide-binding serum protein involved in defense against endotoxin shock, have higher affinity for the lipid A, the toxic moiety of lipopolysaccharides than for ipopolysaccharide. Our observation that the LCCL-domains of CRISPLD2 are specific for the toxic lipid A moiety of the endotoxin suggests that it may block the interaction between endotoxins and the host endotoxin receptors without interfering with the development of antibacterial immunity against the polysaccharide moiety of LPS. We suggest that the anti-inflammatory function of CRISPLD2 protein may account for its role in various pathological and developmental processes.
AuthorsViktor Vásárhelyi, Mária Trexler, László Patthy
JournalBiochimie (Biochimie) Vol. 97 Pg. 66-71 (Feb 2014) ISSN: 1638-6183 [Electronic] France
PMID24090571 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
CopyrightCopyright © 2013 The Authors. Published by Elsevier Masson SAS.. All rights reserved.
Chemical References
  • CRISPLD2 protein, human
  • Cell Adhesion Molecules
  • Interferon Regulatory Factors
  • Lipid A
  • Lipopolysaccharides
  • Recombinant Proteins
Topics
  • Cell Adhesion Molecules (chemistry, genetics)
  • Escherichia coli (genetics, metabolism)
  • Gene Expression
  • Humans
  • Interferon Regulatory Factors (chemistry, genetics)
  • Kinetics
  • Lipid A (chemistry)
  • Lipopolysaccharides (chemistry)
  • Pichia (genetics, metabolism)
  • Protein Binding
  • Protein Structure, Tertiary
  • Recombinant Proteins (chemistry, genetics)

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