1fa8
From Proteopedia
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|SITE= | |SITE= | ||
|LIGAND= | |LIGAND= | ||
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/Lactoylglutathione_lyase Lactoylglutathione lyase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.4.1.5 4.4.1.5] | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Lactoylglutathione_lyase Lactoylglutathione lyase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.4.1.5 4.4.1.5] </span> |
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1f9z|1F9Z]], [[1fa5|1FA5]], [[1fa6|1FA6]], [[1fa7|1FA7]], [[1fro|1fro]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1fa8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fa8 OCA], [http://www.ebi.ac.uk/pdbsum/1fa8 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1fa8 RCSB]</span> | ||
}} | }} | ||
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[[Category: homodimer]] | [[Category: homodimer]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 20:19:00 2008'' |
Revision as of 17:19, 30 March 2008
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| , resolution 1.7Å | |||||||
|---|---|---|---|---|---|---|---|
| Activity: | Lactoylglutathione lyase, with EC number 4.4.1.5 | ||||||
| Related: | 1F9Z, 1FA5, 1FA6, 1FA7, 1fro
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF THE APO FORM GLYOXALASE I OF ESCHERICHIA COLI
Overview
The metalloenzyme glyoxalase I (GlxI) converts the nonenzymatically produced hemimercaptal of cytotoxic methylglyoxal and glutathione to nontoxic S-D-lactoylglutathione. Human GlxI, for which the structure is known, is active in the presence of Zn(2+). Unexpectedly, the Escherichia coli enzyme is inactive in the presence of Zn(2+) and is maximally active with Ni(2+). To understand this difference in metal activation and also to obtain a representative of the bacterial enzymes, the structure of E. coli Ni(2+)-GlxI has been determined. Structures have also been determined for the apo enzyme as well as complexes with Co(2+), Cd(2+), and Zn(2+). It is found that each of the protein-metal complexes that is catalytically active has octahedral geometry. This includes the complexes of the E. coli enzyme with Ni(2+), Co(2+), and Cd(2+), as well as the structures reported for the human Zn(2+) enzyme. Conversely, the complex of the E. coli enzyme with Zn(2+) has trigonal bipyramidal coordination and is inactive. This mode of coordination includes four protein ligands plus a single water molecule. In contrast, the coordination in the active forms of the enzyme includes two water molecules bound to the metal ion, suggesting that this may be a key feature of the catalytic mechanism. A comparison of the human and E. coli enzymes suggests that there are differences between the active sites that might be exploited for therapeutic use.
About this Structure
1FA8 is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
Determination of the structure of Escherichia coli glyoxalase I suggests a structural basis for differential metal activation., He MM, Clugston SL, Honek JF, Matthews BW, Biochemistry. 2000 Aug 1;39(30):8719-27. PMID:10913283
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