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1mr8
From Proteopedia
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MIGRATION INHIBITORY FACTOR-RELATED PROTEIN 8 FROM HUMAN
Contents |
Overview
The structure of human MRP8 in the calcium-bound form was determined at 1.9 A resolution by X-ray crystallography. The structure was initially solved by MAD phasing of an ytterbium-substituted crystal and was refined against data obtained from a Ca(2+)-bound crystal. The dimeric form of MRP8 was stabilized by hydrophobic interactions between mutually wrapped helices. There were two EF-hand motifs per monomer and each EF-hand bound one Ca(2+) with a different affinity [the affinity of the C-terminal EF-hand (EF-2) for Ca(2+) was stronger than that of the N-terminal EF-hand (EF-1)]. Furthermore, replacement with Yb(3+) occurred in the C-terminal EF-hand only, suggesting a more flexible nature for EF-2 than for EF-1. This, combined with previous observations that the helix in EF-2 (helix III) undergoes a large conformational change upon calcium binding, suggests that the C-terminal EF-hand (EF-2) plays a role as a trigger for Ca(2+)-induced conformational change.
Disease
Known disease associated with this structure: Earwax, wet/dry OMIM:[607040]
About this Structure
1MR8 is a Single protein structure of sequence from Homo sapiens with as ligand. Full crystallographic information is available from OCA.
Reference
The structure of human MRP8, a member of the S100 calcium-binding protein family, by MAD phasing at 1.9 A resolution., Ishikawa K, Nakagawa A, Tanaka I, Suzuki M, Nishihira J, Acta Crystallogr D Biol Crystallogr. 2000 May;56(Pt 5):559-66. PMID:10771424
Page seeded by OCA on Thu Feb 21 13:58:14 2008
