1pzb
From Proteopedia
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THE CRYSTAL STRUCTURES OF REDUCED PSEUDOAZURIN FROM ALCALIGENES FAECALIS S-6 AT TWO PH VALUES
Overview
The structures of the reduced (Cu1+) blue-copper protein pseudoazurin from, Alcaligenes faecalis strain S-6 are refined at pH 7.8 and 4.4 using X-ray, diffraction data to 1.8 A resolution. The final R-factors for the high and, low pH structures are 0.178 and 0.177, respectively. Comparing the reduced, pseudoazurin at pH 7.8 with the oxidised (Cu2+) molecule, small changes, are observed in the vicinity of the copper site and on the protein, surface. At pH 4.4 the copper substituent imidazole of His81 rotates away, from the metal with a concurrent movement of the latter towards the plane, of the remaining three ligands (S gamma-Cys78, N delta 1-His40 and S, delta-Met86) thus the geometry of the copper site becomes planar trigonal.
About this Structure
1PZB is a Single protein structure of sequence from Alcaligenes faecalis with CU as ligand. Full crystallographic information is available from OCA.
Reference
The crystal structures of reduced pseudoazurin from Alcaligenes faecalis S-6 at two pH values., Vakoufari E, Wilson KS, Petratos K, FEBS Lett. 1994 Jun 27;347(2-3):203-6. PMID:8034003
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