3pfl
From Proteopedia
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| - | [[Image:3pfl.jpg|left|200px]] | + | [[Image:3pfl.jpg|left|200px]] |
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| - | '''CRYSTAL STRUCTURE OF PFL FROM E.COLI IN COMPLEX WITH SUBSTRATE ANALOGUE OXAMATE''' | + | {{Structure |
| + | |PDB= 3pfl |SIZE=350|CAPTION= <scene name='initialview01'>3pfl</scene>, resolution 2.60Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=OXM:OXAMIC ACID'>OXM</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Formate_C-acetyltransferase Formate C-acetyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.1.54 2.3.1.54] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''CRYSTAL STRUCTURE OF PFL FROM E.COLI IN COMPLEX WITH SUBSTRATE ANALOGUE OXAMATE''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 3PFL is a [ | + | 3PFL is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3PFL OCA]. |
==Reference== | ==Reference== | ||
| - | Structure and mechanism of the glycyl radical enzyme pyruvate formate-lyase., Becker A, Fritz-Wolf K, Kabsch W, Knappe J, Schultz S, Volker Wagner AF, Nat Struct Biol. 1999 Oct;6(10):969-75. PMID:[http:// | + | Structure and mechanism of the glycyl radical enzyme pyruvate formate-lyase., Becker A, Fritz-Wolf K, Kabsch W, Knappe J, Schultz S, Volker Wagner AF, Nat Struct Biol. 1999 Oct;6(10):969-75. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10504733 10504733] |
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
[[Category: Formate C-acetyltransferase]] | [[Category: Formate C-acetyltransferase]] | ||
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[[Category: transferase]] | [[Category: transferase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 19:06:33 2008'' |
Revision as of 17:06, 20 March 2008
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| , resolution 2.60Å | |||||||
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| Ligands: | |||||||
| Activity: | Formate C-acetyltransferase, with EC number 2.3.1.54 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF PFL FROM E.COLI IN COMPLEX WITH SUBSTRATE ANALOGUE OXAMATE
Overview
Pyruvate formate-lyase (PFL) from Escherichia coli uses a radical mechanism to reversibly cleave the C1-C2 bond of pyruvate using the Gly 734 radical and two cysteine residues (Cys 418, Cys 419). We have determined by X-ray crystallography the structures of PFL (non-radical form), its complex with the substrate analog oxamate, and the C418A,C419A double mutant. The atomic model (a dimer of 759-residue monomers) comprises a 10-stranded beta/alpha barrel assembled in an antiparallel manner from two parallel five-stranded beta-sheets; this architecture resembles that of ribonucleotide reductases. Gly 734 and Cys 419, positioned at the tips of opposing hairpin loops, meet in the apolar barrel center (Calpha-Sgamma = 3.7 A). Oxamate fits into a compact pocket where C2 is juxtaposed with Cys 418Sgamma (3.3 A), which in turn is close to Cys 419Sgamma (3.7 A). Our model of the active site is suggestive of a snapshot of the catalytic cycle, when the pyruvate-carbonyl awaits attack by the Cys 418 thiyl radical. We propose a homolytic radical mechanism for PFL that involves Cys 418 and Cys 419 both as thiyl radicals, with distinct chemical functions.
About this Structure
3PFL is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
Structure and mechanism of the glycyl radical enzyme pyruvate formate-lyase., Becker A, Fritz-Wolf K, Kabsch W, Knappe J, Schultz S, Volker Wagner AF, Nat Struct Biol. 1999 Oct;6(10):969-75. PMID:10504733
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