1k6w
From Proteopedia
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| - | [[Image:1k6w.jpg|left|200px]] | + | [[Image:1k6w.jpg|left|200px]] |
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| - | '''The Structure of Escherichia coli Cytosine Deaminase''' | + | {{Structure |
| + | |PDB= 1k6w |SIZE=350|CAPTION= <scene name='initialview01'>1k6w</scene>, resolution 1.75Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=FE:FE (III) ION'>FE</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Cytosine_deaminase Cytosine deaminase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.5.4.1 3.5.4.1] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''The Structure of Escherichia coli Cytosine Deaminase''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1K6W is a [ | + | 1K6W 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=1K6W OCA]. |
==Reference== | ==Reference== | ||
| - | The structure of Escherichia coli cytosine deaminase., Ireton GC, McDermott G, Black ME, Stoddard BL, J Mol Biol. 2002 Jan 25;315(4):687-97. PMID:[http:// | + | The structure of Escherichia coli cytosine deaminase., Ireton GC, McDermott G, Black ME, Stoddard BL, J Mol Biol. 2002 Jan 25;315(4):687-97. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11812140 11812140] |
[[Category: Cytosine deaminase]] | [[Category: Cytosine deaminase]] | ||
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
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[[Category: hexamer]] | [[Category: hexamer]] | ||
| - | ''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 12:13:22 2008'' |
Revision as of 10:13, 20 March 2008
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| , resolution 1.75Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Activity: | Cytosine deaminase, with EC number 3.5.4.1 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
The Structure of Escherichia coli Cytosine Deaminase
Overview
Cytosine deaminase (CD) catalyzes the deamination of cytosine, producing uracil. This enzyme is present in prokaryotes and fungi (but not multicellular eukaryotes) and is an important member of the pyrimidine salvage pathway in those organisms. The same enzyme also catalyzes the conversion of 5-fluorocytosine to 5-fluorouracil; this activity allows the formation of a cytotoxic chemotherapeutic agent from a non-cytotoxic precursor. The enzyme is of widespread interest both for antimicrobial drug design and for gene therapy applications against tumors. The structure of Escherichia coli CD has been determined in the presence and absence of a bound mechanism-based inhibitor. The enzyme forms an (alphabeta)(8) barrel structure with structural similarity to adenosine deaminase, a relationship that is undetectable at the sequence level, and no similarity to bacterial cytidine deaminase. The enzyme is packed into a hexameric assembly stabilized by a unique domain-swapping interaction between enzyme subunits. The active site is located in the mouth of the enzyme barrel and contains a bound iron ion that coordinates a hydroxyl nucleophile. Substrate binding involves a significant conformational change that sequesters the reaction complex from solvent.
About this Structure
1K6W is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
The structure of Escherichia coli cytosine deaminase., Ireton GC, McDermott G, Black ME, Stoddard BL, J Mol Biol. 2002 Jan 25;315(4):687-97. PMID:11812140
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