1iay
From Proteopedia
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|PDB= 1iay |SIZE=350|CAPTION= <scene name='initialview01'>1iay</scene>, resolution 2.7Å | |PDB= 1iay |SIZE=350|CAPTION= <scene name='initialview01'>1iay</scene>, resolution 2.7Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=PLP:PYRIDOXAL-5 | + | |LIGAND= <scene name='pdbligand=PLP:PYRIDOXAL-5'-PHOSPHATE'>PLP</scene> and <scene name='pdbligand=AVG:2-AMINO-4-(2-AMINO-ETHOXY)-BUTYRIC ACID'>AVG</scene> |
|ACTIVITY= [http://en.wikipedia.org/wiki/1-aminocyclopropane-1-carboxylate_synthase 1-aminocyclopropane-1-carboxylate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.4.1.14 4.4.1.14] | |ACTIVITY= [http://en.wikipedia.org/wiki/1-aminocyclopropane-1-carboxylate_synthase 1-aminocyclopropane-1-carboxylate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.4.1.14 4.4.1.14] | ||
|GENE= | |GENE= | ||
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[[Category: v6-dependent enzyme]] | [[Category: v6-dependent enzyme]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 23 12:11:48 2008'' |
Revision as of 10:11, 23 March 2008
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| , resolution 2.7Å | |||||||
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| Ligands: | and | ||||||
| Activity: | 1-aminocyclopropane-1-carboxylate synthase, with EC number 4.4.1.14 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF ACC SYNTHASE COMPLEXED WITH COFACTOR PLP AND INHIBITOR AVG
Overview
The structures of tomato 1-aminocyclopropane-1-carboxylate synthase (ACS) in complex with either cofactor pyridoxal-5'-phosphate (PLP) or both PLP and inhibitor aminoethoxyvinylglycine have been determined by x-ray crystallography. The structures showed good conservation of the catalytic residues, suggesting a similar catalytic mechanism for ACS and other PLP-dependent enzymes. However, the proximity of Tyr152 to the C-gamma-S bond of model substrate S-adenosylmethionine implies its critical role in the catalysis. The concerted accomplishment of catalysis by cofactor PLP and a protein residue, as proposed on the basis of the ACS structures in this paper, may represent a general scheme for the diversity of PLP-dependent catalyses. PLP-dependent enzymes have been categorized into four types of folds. A structural comparison revealed that a core fragment of ACS in fold type I is superimposable over tryptophan synthase beta subunit in fold type II and mouse ornithine decarboxylase in fold type III, thus suggesting a divergent evolution of PLP-dependent enzymes.
About this Structure
1IAY is a Single protein structure of sequence from Solanum lycopersicum. Full crystallographic information is available from OCA.
Reference
Crystal structures of 1-aminocyclopropane-1-carboxylate (ACC) synthase in complex with aminoethoxyvinylglycine and pyridoxal-5'-phosphate provide new insight into catalytic mechanisms., Huai Q, Xia Y, Chen Y, Callahan B, Li N, Ke H, J Biol Chem. 2001 Oct 12;276(41):38210-6. Epub 2001 Jun 28. PMID:11431475
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