Structural highlights
Function[APBA1_HUMAN] Putative function in synaptic vesicle exocytosis by binding to Munc18-1, an essential component of the synaptic vesicle exocytotic machinery. May modulate processing of the beta-amyloid precursor protein (APP) and hence formation of beta-APP. 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 PubMedProtection against reactive oxygen species is provided by the copper containing enzyme superoxide dismutase 1 (SOD1). The copper chaperone CCS is responsible for copper insertion into apo-SOD1. This role is impaired by an interaction between the second PDZ domain (PDZ2alpha) of the neuronal adaptor protein X11alpha and the third domain of CCS (McLoughlin et al. (2001) J. Biol. Chem., 276, 9303-9307). The solution structure of the PDZ2alpha domain has been determined and the interaction with peptides derived from CCS has been explored. PDZ2alpha binds to the last four amino acids of the CCS protein (PAHL) with a dissociation constant of 91 +/- 2 microM. Peptide variants have been used to map the interaction areas on PDZ2alpha for each amino acid, showing an important role for the C-terminal leucine, in line with canonical PDZ-peptide interactions. Solution structure of the second PDZ domain of the neuronal adaptor X11alpha and its interaction with the C-terminal peptide of the human copper chaperone for superoxide dismutase.,Duquesne AE, Ruijter M, Brouwer J, Drijfhout JW, Nabuurs SB, Spronk CA, Vuister GW, Ubbink M, Canters GW J Biomol NMR. 2005 Jul;32(3):209-18. PMID:16132821[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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