1unb
From Proteopedia
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|PDB= 1unb |SIZE=350|CAPTION= <scene name='initialview01'>1unb</scene>, resolution 1.5Å | |PDB= 1unb |SIZE=350|CAPTION= <scene name='initialview01'>1unb</scene>, resolution 1.5Å | ||
|SITE= <scene name='pdbsite=AC1:Pn1+Binding+Site+For+Chain+A'>AC1</scene> | |SITE= <scene name='pdbsite=AC1:Pn1+Binding+Site+For+Chain+A'>AC1</scene> | ||
| - | |LIGAND= <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene> | + | |LIGAND= <scene name='pdbligand=AKG:2-OXYGLUTARIC+ACID'>AKG</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=PN1:(2S,6R)-6-{[(2R)-2-AMINO-2-PHENYLETHANOYL]AMINO}-3,3-DIMETHYL-7-OXO-4-THIA-1-AZABICYCLO[3.2.0]HEPTANE-2-CARBOXYLIC+ACID'>PN1</scene> |
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/Deacetoxycephalosporin-C_synthase Deacetoxycephalosporin-C synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.14.20.1 1.14.20.1] | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Deacetoxycephalosporin-C_synthase Deacetoxycephalosporin-C synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.14.20.1 1.14.20.1] </span> |
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1unb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1unb OCA], [http://www.ebi.ac.uk/pdbsum/1unb PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1unb RCSB]</span> | ||
}} | }} | ||
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[[Category: Scheltinga, A C.Terwisscha Van.]] | [[Category: Scheltinga, A C.Terwisscha Van.]] | ||
[[Category: Valegard, K.]] | [[Category: Valegard, K.]] | ||
| - | [[Category: AKG]] | ||
| - | [[Category: FE2]] | ||
[[Category: oxidoreductase]] | [[Category: oxidoreductase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 00:12:40 2008'' |
Revision as of 21:12, 30 March 2008
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| , resolution 1.5Å | |||||||
|---|---|---|---|---|---|---|---|
| Sites: | |||||||
| Ligands: | , , | ||||||
| Activity: | Deacetoxycephalosporin-C synthase, with EC number 1.14.20.1 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
DEACETOXYCEPHALOSPORIN C SYNTHASE COMPLEXED WITH 2-OXOGLUTARATE AND AMPICILLIN
Overview
Deacetoxycephalosporin-C synthase (DAOCS) is a mononuclear ferrous enzyme that transforms penicillins into cephalosporins by inserting a carbon atom into the penicillin nucleus. In the first half-reaction, dioxygen and 2-oxoglutarate produce a reactive iron-oxygen species, succinate and CO2. The oxidizing iron species subsequently reacts with penicillin to give cephalosporin and water. Here we describe high-resolution structures for ferrous DAOCS in complex with penicillins, the cephalosporin product, the cosubstrate and the coproduct. Steady-state kinetic data, quantum-chemical calculations and the new structures indicate a reaction sequence in which a 'booby-trapped' oxidizing species is formed. This species is stabilized by the negative charge of succinate on the iron. The binding sites of succinate and penicillin overlap, and when penicillin replaces succinate, it removes the stabilizing charge, eliciting oxidative attack on itself. Requisite groups of penicillin are within 1 A of the expected position of a ferryl oxygen in the enzyme-penicillin complex.
About this Structure
1UNB is a Single protein structure of sequence from Streptomyces clavuligerus. Full crystallographic information is available from OCA.
Reference
The structural basis of cephalosporin formation in a mononuclear ferrous enzyme., Valegard K, Terwisscha van Scheltinga AC, Dubus A, Ranghino G, Oster LM, Hajdu J, Andersson I, Nat Struct Mol Biol. 2004 Jan;11(1):95-101. Epub 2003 Dec 29. PMID:14718929
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