1e6e

ADRENODOXIN REDUCTASE/ADRENODOXIN COMPLEX OF MITOCHONDRIAL P450 SYSTEMS

spinqualitylabelsall models 1e6e, resolution 2.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1e6e is a 4 chain structure with sequence from Bos taurus. The October 2006 RCSB PDB Molecule of the Month feature on Cytochrome p450 by David S. Goodsell is 10.2210/rcsb_pdb/mom_2006_10. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: FAD, FES, SO4 Related: 1e1k, 1e1l, 1e1m, 1e1n, 1cjc, 1cje, 1ayf Resources: FirstGlance, OCA, RCSB, PDBsum Function [ADRO_BOVIN] Serves as the first electron transfer protein in all the mitochondrial P450 systems. Including cholesterol side chain cleavage in all steroidogenic tissues, steroid 11-beta hydroxylation in the adrenal cortex, 25-OH-vitamin D3-24 hydroxylation in the kidney, and sterol C-27 hydroxylation in the liver. [ADX_BOVIN] Essential for the synthesis of various steroid hormones, participates in the reduction of mitochondrial cytochrome P450 for steroidogenesis. Transfers electrons from adrenodoxin reductase to cytochrome P450 cholesterol side-chain cleavage enzyme. reductase to the cholesterol side chain cleavage cytochrome P450 (By similarity). 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 PubMed The steroid hydroxylating system of adrenal cortex mitochondria consists of the membrane-attached NADPH-dependent adrenodoxin reductase (AR), the soluble one-electron transport protein adrenodoxin (Adx), and a membrane-integrated cytochrome P450 of the CYP11 family. In the 2.3-A resolution crystal structure of the Adx.AR complex, 580 A(2) of partly polar surface are buried. Main interaction sites are centered around Asp(79), Asp(76), Asp(72), and Asp(39) of Adx and around Arg(211), Arg(240), Arg(244), and Lys(27) of AR, respectively. In particular, the region around Asp(39) defines a new protein interaction site for Adx, similar to those found in plant and bacterial ferredoxins. Additional contacts involve the electron transfer region between the redox centers of AR and Adx and C-terminal residues of Adx. The Adx residues Asp(113) to Arg(115) adopt 3(10)-helical conformation and engage in loose intermolecular contacts within a deep cleft of AR. Complex formation is accompanied by a slight domain rearrangement in AR. The [2Fe-2S] cluster of Adx and the isoalloxazine rings of FAD of AR are 10 A apart suggesting a possible electron transfer route between these redox centers. The AR.Adx complex represents the first structure of a biologically relevant complex between a ferredoxin and its reductase. Adrenodoxin reductase-adrenodoxin complex structure suggests electron transfer path in steroid biosynthesis.,Muller JJ, Lapko A, Bourenkov G, Ruckpaul K, Heinemann U J Biol Chem. 2001 Jan 26;276(4):2786-9. Epub 2000 Oct 25. PMID:11053423 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Adrenodoxin reductase Ferredoxin

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