1kkr
From Proteopedia
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| - | [[Image:1kkr.gif|left|200px]] | + | [[Image:1kkr.gif|left|200px]] |
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| - | '''CRYSTAL STRUCTURE OF CITROBACTER AMALONATICUS METHYLASPARTATE AMMONIA LYASE CONTAINING (2S,3S)-3-METHYLASPARTIC ACID''' | + | {{Structure |
| + | |PDB= 1kkr |SIZE=350|CAPTION= <scene name='initialview01'>1kkr</scene>, resolution 2.10Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene> and <scene name='pdbligand=3MD:2S,3S-3-METHYLASPARTIC ACID'>3MD</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Methylaspartate_ammonia-lyase Methylaspartate ammonia-lyase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.3.1.2 4.3.1.2] | ||
| + | |GENE= MAL ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=35703 Citrobacter amalonaticus]) | ||
| + | }} | ||
| + | |||
| + | '''CRYSTAL STRUCTURE OF CITROBACTER AMALONATICUS METHYLASPARTATE AMMONIA LYASE CONTAINING (2S,3S)-3-METHYLASPARTIC ACID''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1KKR is a [ | + | 1KKR is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Citrobacter_amalonaticus Citrobacter amalonaticus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KKR OCA]. |
==Reference== | ==Reference== | ||
| - | Insights into enzyme evolution revealed by the structure of methylaspartate ammonia lyase., Levy CW, Buckley PA, Sedelnikova S, Kato Y, Asano Y, Rice DW, Baker PJ, Structure. 2002 Jan;10(1):105-13. PMID:[http:// | + | Insights into enzyme evolution revealed by the structure of methylaspartate ammonia lyase., Levy CW, Buckley PA, Sedelnikova S, Kato Y, Asano Y, Rice DW, Baker PJ, Structure. 2002 Jan;10(1):105-13. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11796115 11796115] |
[[Category: Citrobacter amalonaticus]] | [[Category: Citrobacter amalonaticus]] | ||
[[Category: Methylaspartate ammonia-lyase]] | [[Category: Methylaspartate ammonia-lyase]] | ||
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[[Category: tim barrel]] | [[Category: tim barrel]] | ||
| - | ''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 12:18:44 2008'' |
Revision as of 10:18, 20 March 2008
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| , resolution 2.10Å | |||||||
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| Ligands: | and | ||||||
| Gene: | MAL (Citrobacter amalonaticus) | ||||||
| Activity: | Methylaspartate ammonia-lyase, with EC number 4.3.1.2 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF CITROBACTER AMALONATICUS METHYLASPARTATE AMMONIA LYASE CONTAINING (2S,3S)-3-METHYLASPARTIC ACID
Overview
Methylaspartate ammonia lyase (MAL) catalyzes the magnesium-dependent reversible alpha,beta-elimination of ammonia from L-threo-(2S,3S)-3-methylaspartic acid to mesaconic acid. The 1.3 A MAD crystal structure of the dimeric Citrobacter amalonaticus MAL shows that each subunit comprises two domains, one of which adopts the classical TIM barrel fold, with the active site at the C-terminal end of the barrel. Despite very low sequence similarity, the structure of MAL is closely related to those of representative members of the enolase superfamily, indicating that the mechanism of MAL involves the initial abstraction of a proton alpha to the 3-carboxyl of (2S,3S)-3-methylasparic acid to yield an enolic intermediate. This analysis resolves the conflict that had linked MAL to the histidine and phenylalanine ammonia lyase family of enzymes.
About this Structure
1KKR is a Single protein structure of sequence from Citrobacter amalonaticus. Full crystallographic information is available from OCA.
Reference
Insights into enzyme evolution revealed by the structure of methylaspartate ammonia lyase., Levy CW, Buckley PA, Sedelnikova S, Kato Y, Asano Y, Rice DW, Baker PJ, Structure. 2002 Jan;10(1):105-13. PMID:11796115
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