1niu
From Proteopedia
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|PDB= 1niu |SIZE=350|CAPTION= <scene name='initialview01'>1niu</scene>, resolution 2.20Å | |PDB= 1niu |SIZE=350|CAPTION= <scene name='initialview01'>1niu</scene>, resolution 2.20Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=DCS:D-[3-HYDROXY-2-METHYL-5-PHOSPHONOOXYMETHYL-PYRIDIN-4-YLMETHYL]-N,O-CYCLOSERYLAMIDE'>DCS</scene> | + | |LIGAND= <scene name='pdbligand=DCS:D-[3-HYDROXY-2-METHYL-5-PHOSPHONOOXYMETHYL-PYRIDIN-4-YLMETHYL]-N,O-CYCLOSERYLAMIDE'>DCS</scene>, <scene name='pdbligand=KCX:LYSINE+NZ-CARBOXYLIC+ACID'>KCX</scene> |
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/Alanine_racemase Alanine racemase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.1.1.1 5.1.1.1] | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Alanine_racemase Alanine racemase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.1.1.1 5.1.1.1] </span> |
|GENE= ALR OR DAL ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1422 Geobacillus stearothermophilus]) | |GENE= ALR OR DAL ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1422 Geobacillus stearothermophilus]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1sft|1SFT]], [[1bd0|1BD0]], [[1epv|1EPV]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1niu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1niu OCA], [http://www.ebi.ac.uk/pdbsum/1niu PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1niu RCSB]</span> | ||
}} | }} | ||
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[[Category: Ringe, D.]] | [[Category: Ringe, D.]] | ||
[[Category: Stamper, G F.]] | [[Category: Stamper, G F.]] | ||
| - | [[Category: DCS]] | ||
[[Category: plp-containing]] | [[Category: plp-containing]] | ||
[[Category: tim barrel]] | [[Category: tim barrel]] | ||
| - | ''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 22:30:57 2008'' |
Revision as of 19:30, 30 March 2008
| |||||||
| , resolution 2.20Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , | ||||||
| Gene: | ALR OR DAL (Geobacillus stearothermophilus) | ||||||
| Activity: | Alanine racemase, with EC number 5.1.1.1 | ||||||
| Related: | 1SFT, 1BD0, 1EPV
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
ALANINE RACEMASE WITH BOUND INHIBITOR DERIVED FROM L-CYCLOSERINE
Overview
Alanine racemase (EC 5.1.1.1) catalyzes the interconversion of alanine enantiomers, and thus represents the first committed step involved in bacterial cell wall biosynthesis. Cycloserine acts as a suicide inhibitor of alanine racemase and as such, serves as an antimicrobial agent. The chemical means by which cycloserine inhibits alanine racemase is unknown. Through spectroscopic assays, we show here evidence of a pyridoxal derivative (arising from either isomer of cycloserine) saturated at the C4' carbon position. We additionally report the L- and D-cycloserine inactivated crystal structures of Bacillus stearothermophilus alanine racemase, which corroborates the spectroscopy via evidence of a 3-hydroxyisoxazole pyridoxamine derivative. Upon the basis of the kinetic and structural properties of both the L- and D-isomers of the inhibitor, we propose a mechanism of alanine racemase inactivation by cycloserine. This pathway involves an initial transamination step followed by tautomerization to form a stable aromatic adduct, a scheme similar to that seen in cycloserine inactivation of aminotransferases.
About this Structure
1NIU is a Single protein structure of sequence from Geobacillus stearothermophilus. Full crystallographic information is available from OCA.
Reference
A side reaction of alanine racemase: transamination of cycloserine., Fenn TD, Stamper GF, Morollo AA, Ringe D, Biochemistry. 2003 May 20;42(19):5775-83. PMID:12741835
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