2cdq: Difference between revisions
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[[Image:2cdq.gif|left|200px]] | [[Image:2cdq.gif|left|200px]] | ||
'''CRYSTAL STRUCTURE OF ARABIDOPSIS THALIANA ASPARTATE KINASE COMPLEXED WITH LYSINE AND S-ADENOSYLMETHIONINE''' | {{Structure | ||
|PDB= 2cdq |SIZE=350|CAPTION= <scene name='initialview01'>2cdq</scene>, resolution 2.85Å | |||
|SITE= <scene name='pdbsite=AC1:Tar+Binding+Site+For+Chain+B'>AC1</scene> | |||
|LIGAND= <scene name='pdbligand=TAR:D(-)-TARTARIC+ACID'>TAR</scene>, <scene name='pdbligand=SAM:S-ADENOSYLMETHIONINE'>SAM</scene> and <scene name='pdbligand=LYS:LYSINE'>LYS</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Aspartate_kinase Aspartate kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.2.4 2.7.2.4] | |||
|GENE= | |||
}} | |||
'''CRYSTAL STRUCTURE OF ARABIDOPSIS THALIANA ASPARTATE KINASE COMPLEXED WITH LYSINE AND S-ADENOSYLMETHIONINE''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
2CDQ is a [ | 2CDQ is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2CDQ OCA]. | ||
==Reference== | ==Reference== | ||
A novel organization of ACT domains in allosteric enzymes revealed by the crystal structure of Arabidopsis aspartate kinase., Mas-Droux C, Curien G, Robert-Genthon M, Laurencin M, Ferrer JL, Dumas R, Plant Cell. 2006 Jul;18(7):1681-92. Epub 2006 May 26. PMID:[http:// | A novel organization of ACT domains in allosteric enzymes revealed by the crystal structure of Arabidopsis aspartate kinase., Mas-Droux C, Curien G, Robert-Genthon M, Laurencin M, Ferrer JL, Dumas R, Plant Cell. 2006 Jul;18(7):1681-92. Epub 2006 May 26. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16731588 16731588] | ||
[[Category: Arabidopsis thaliana]] | [[Category: Arabidopsis thaliana]] | ||
[[Category: Aspartate kinase]] | [[Category: Aspartate kinase]] | ||
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[[Category: transferase]] | [[Category: transferase]] | ||
''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 16:14:07 2008'' | ||
Revision as of 17:14, 20 March 2008
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| , resolution 2.85Å | |||||||
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| Sites: | |||||||
| Ligands: | , and | ||||||
| Activity: | Aspartate kinase, with EC number 2.7.2.4 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF ARABIDOPSIS THALIANA ASPARTATE KINASE COMPLEXED WITH LYSINE AND S-ADENOSYLMETHIONINE
OverviewOverview
Asp kinase catalyzes the first step of the Asp-derived essential amino acid pathway in plants and microorganisms. Depending on the source organism, this enzyme contains up to four regulatory ACT domains and exhibits several isoforms under the control of a great variety of allosteric effectors. We report here the dimeric structure of a Lys and S-adenosylmethionine-sensitive Asp kinase isoform from Arabidopsis thaliana in complex with its two inhibitors. This work reveals the structure of an Asp kinase and an enzyme containing two ACT domains cocrystallized with its effectors. Only one ACT domain (ACT1) is implicated in effector binding. A loop involved in the binding of Lys and S-adenosylmethionine provides an explanation for the synergistic inhibition by these effectors. The presence of S-adenosylmethionine in the regulatory domain indicates that ACT domains are also able to bind nucleotides. The organization of ACT domains in the present structure is different from that observed in Thr deaminase and in the regulatory subunit of acetohydroxyacid synthase III.
About this StructureAbout this Structure
2CDQ is a Single protein structure of sequence from Arabidopsis thaliana. Full crystallographic information is available from OCA.
ReferenceReference
A novel organization of ACT domains in allosteric enzymes revealed by the crystal structure of Arabidopsis aspartate kinase., Mas-Droux C, Curien G, Robert-Genthon M, Laurencin M, Ferrer JL, Dumas R, Plant Cell. 2006 Jul;18(7):1681-92. Epub 2006 May 26. PMID:16731588
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