1opm
From Proteopedia
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OXIDIZED (CU2+) PEPTIDYLGLYCINE ALPHA-HYDROXYLATING MONOOXYGENASE (PHM) WITH BOUND SUBSTRATE
Overview
Peptide amidation is a ubiquitous posttranslational modification of bioactive peptides. Peptidylglycine alpha-hydroxylating monooxygenase (PHM; EC 1.14.17.3), the enzyme that catalyzes the first step of this reaction, is composed of two domains, each of which binds one copper atom. The coppers are held 11 A apart on either side of a solvent-filled interdomain cleft, and the PHM reaction requires electron transfer between these sites. A plausible mechanism for electron transfer might involve interdomain motion to decrease the distance between the copper atoms. Our experiments show that PHM catalytic core (PHMcc) is enzymatically active in the crystal phase, where interdomain motion is not possible. Instead, structures of two states relevant to catalysis indicate that water, substrate and active site residues may provide an electron transfer pathway that exists only during the PHM catalytic cycle.
About this Structure
1OPM is a Single protein structure of sequence from Rattus norvegicus with , , , and as ligands. Active as Peptidylglycine monooxygenase, with EC number 1.14.17.3 Full crystallographic information is available from OCA.
Reference
Substrate-mediated electron transfer in peptidylglycine alpha-hydroxylating monooxygenase., Prigge ST, Kolhekar AS, Eipper BA, Mains RE, Amzel LM, Nat Struct Biol. 1999 Oct;6(10):976-83. PMID:10504734
Page seeded by OCA on Thu Feb 21 14:20:17 2008
Categories: Peptidylglycine monooxygenase | Rattus norvegicus | Single protein | Amzel, L M. | Prigge, S T. | AZI | CU | GOL | IYG | NI | Ascorbate | Bioactive peptide activation | Copper | Monooxygenase | Oxidoreductase
