1c5a
From Proteopedia
THREE-DIMENSIONAL STRUCTURE OF PORCINE C5ADES*ARG FROM 1H NUCLEAR MAGNETIC RESONANCE DATA
Structural highlights
FunctionCO5_PIG Derived from proteolytic degradation of complement C5, C5 anaphylatoxin is a mediator of local inflammatory process. It induces the contraction of smooth muscle, increases vascular permeability and causes histamine release from mast cells and basophilic leukocytes. C5a also stimulates the locomotion of polymorphonuclear leukocytes (chemokinesis) and direct their migration toward sites of inflammation (chemotaxis). Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedTwo-dimensional nuclear magnetic resonance spectra of porcine C5adesArg (73 residues) have been used to construct a list of 34 hydrogen bonds, 27 dihedral angle constraints, and 151 distance constraints, derived from nuclear Overhauser effect data. These constraints were used in restrained molecular dynamics calculations on residues 1-65 of C5a, starting from a folded structure modeled on the crystal structure of a homologous protein, C3a. Forty-one structures have been calculated, which fall into three similar families with few violations of the imposed constraints. Structures in the most populated family have a root-mean-square deviation from the average structure of 1.02 A for the C alpha atoms, with good definition of the internal residues. There is good agreement between the calculated structures and other nuclear magnetic resonance data. The structure is very similar to that recently reported for human C5a [Zuiderweg et al. (1989) Biochemistry 28, 172-185]. Some biological implications of these structures are discussed. Three-dimensional structure of porcine C5adesArg from 1H nuclear magnetic resonance data.,Williamson MP, Madison VS Biochemistry. 1990 Mar 27;29(12):2895-905. PMID:2337573[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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