X-ray crystal structure of VioC bound to vanadyl ion, L-homoarginine, and succinateX-ray crystal structure of VioC bound to vanadyl ion, L-homoarginine, and succinate

Structural highlights

6db2 is a 1 chain structure with sequence from Streptomyces vinaceus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.7Å
Ligands:, , ,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

ARGHX_STRVI Involved in the biosynthesis of capreomycidine, an unusual amino acid used by non-ribosomal peptide synthases (NRPS) to make the tuberactinomycin class of peptide antibiotics such as viomycin and capreomycin. Catalyzes the stereospecific hydroxylation of the C3 of (2S)-arginine to generate (3S)-hydroxy-(2S)-arginine. Usually clavaminic acid synthase-like oxygenases catalyze the formation of threo diastereomers, however VioC produces the erythro diastereomer of beta-carbon-hydroxylated L-arginine. It exerts a broad substrate specificity by accepting the analogs L-homoarginine and L-canavanine for the beta-carbon hydroxylation.[1] [2] [3]

See Also

References

  1. Yin X, Zabriskie TM. VioC is a non-heme iron, alpha-ketoglutarate-dependent oxygenase that catalyzes the formation of 3S-hydroxy-L-arginine during viomycin biosynthesis. Chembiochem. 2004 Sep 6;5(9):1274-7. PMID:15368580 doi:http://dx.doi.org/10.1002/cbic.200400082
  2. Ju J, Ozanick SG, Shen B, Thomas MG. Conversion of (2S)-arginine to (2S,3R)-capreomycidine by VioC and VioD from the viomycin biosynthetic pathway of Streptomyces sp. strain ATCC11861. Chembiochem. 2004 Sep 6;5(9):1281-5. PMID:15368582 doi:http://dx.doi.org/10.1002/cbic.200400136
  3. Helmetag V, Samel SA, Thomas MG, Marahiel MA, Essen LO. Structural basis for the erythro-stereospecificity of the L-arginine oxygenase VioC in viomycin biosynthesis. FEBS J. 2009 Jul;276(13):3669-82. Epub 2009 May 26. PMID:19490124 doi:10.1111/j.1742-4658.2009.07085.x

6db2, resolution 1.70Å

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