X-ray structure of Ca(2+)-S100B with human RAGE-derived W61 peptideX-ray structure of Ca(2+)-S100B with human RAGE-derived W61 peptide

Structural highlights

4xyn is a 5 chain structure. This structure supersedes the now removed PDB entry 4n6i. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Resources:FirstGlance, OCA, RCSB, PDBsum

Function

[S100B_HUMAN] Weakly binds calcium but binds zinc very tightly-distinct binding sites with different affinities exist for both ions on each monomer. Physiological concentrations of potassium ion antagonize the binding of both divalent cations, especially affecting high-affinity calcium-binding sites. Binds to and initiates the activation of STK38 by releasing autoinhibitory intramolecular interactions within the kinase. Interaction with AGER after myocardial infarction may play a role in myocyte apoptosis by activating ERK1/2 and p53/TP53 signaling (By similarity). Could assist ATAD3A cytoplasmic processing, preventing aggregation and favoring mitochondrial localization.[1]

References

  1. Gilquin B, Cannon BR, Hubstenberger A, Moulouel B, Falk E, Merle N, Assard N, Kieffer S, Rousseau D, Wilder PT, Weber DJ, Baudier J. The calcium-dependent interaction between S100B and the mitochondrial AAA ATPase ATAD3A and the role of this complex in the cytoplasmic processing of ATAD3A. Mol Cell Biol. 2010 Jun;30(11):2724-36. doi: 10.1128/MCB.01468-09. Epub 2010 Mar , 29. PMID:20351179 doi:10.1128/MCB.01468-09

4xyn, resolution 2.55Å

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