1bxu
From Proteopedia
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OXIDIZED PLASTOCYANIN FROM SYNECHOCOCCUS SP.
Overview
The crystal structures of oxidized and reduced plastocyanins from, Synechococcus sp. PCC 7942 have been determined at 1.9 and 1.8 A, resolution, respectively, at pH 5.0. The protein consists of only 91 amino, acid residues, the smallest number known for a plastocyanin, and, apparently lacks the mostly conserved acidic patch that is believed to be, important for recognition with electron-transfer partners. The protein has, two acidic residues, Glu42 and Glu85, around Tyr83, which is thought to be, a possible conduit for electrons, but these are neutralized by Arg88 and, Lys58. Residue Arg88 interacts with Tyr83 through a pi-pi interaction in, which the guanidinium group of the former completely overlaps the aromatic, ring of the tyrosine. Reduction of the protein at pH 5.0 causes a, ... [(full description)]
About this Structure
1BXU is a [Single protein] structure of sequence from [Synechococcus sp.] with CU as [ligand]. Structure known Active Site: CUB. Full crystallographic information is available from [OCA].
Reference
Crystal structure determinations of oxidized and reduced plastocyanin from the cyanobacterium Synechococcus sp. PCC 7942., Inoue T, Sugawara H, Hamanaka S, Tsukui H, Suzuki E, Kohzuma T, Kai Y, Biochemistry. 1999 May 11;38(19):6063-9. PMID:10320332
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