1gq9
From Proteopedia
| Line 1: | Line 1: | ||
| - | [[Image:1gq9.gif|left|200px]] | + | [[Image:1gq9.gif|left|200px]] |
| - | + | ||
| - | '''THE STRUCTURE OF CMP:2-KETO-3-DEOXY-MANNO-OCTONIC ACID SYNTHETASE COMPLEXED WITH CTP AT 100K''' | + | {{Structure |
| + | |PDB= 1gq9 |SIZE=350|CAPTION= <scene name='initialview01'>1gq9</scene>, resolution 2.6Å | ||
| + | |SITE= <scene name='pdbsite=CTA:Ctp+Binding+Site+For+Chain+B'>CTA</scene> | ||
| + | |LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene> and <scene name='pdbligand=CTP:CYTIDINE-5'-TRIPHOSPHATE'>CTP</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/3-deoxy-manno-octulosonate_cytidylyltransferase 3-deoxy-manno-octulosonate cytidylyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.38 2.7.7.38] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''THE STRUCTURE OF CMP:2-KETO-3-DEOXY-MANNO-OCTONIC ACID SYNTHETASE COMPLEXED WITH CTP AT 100K''' | ||
| + | |||
==Overview== | ==Overview== | ||
| Line 7: | Line 16: | ||
==About this Structure== | ==About this Structure== | ||
| - | 1GQ9 is a [ | + | 1GQ9 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=1GQ9 OCA]. |
==Reference== | ==Reference== | ||
| - | Catalytic mechanism of CMP:2-keto-3-deoxy-manno-octonic acid synthetase as derived from complexes with reaction educt and product., Jelakovic S, Schulz GE, Biochemistry. 2002 Jan 29;41(4):1174-81. PMID:[http:// | + | Catalytic mechanism of CMP:2-keto-3-deoxy-manno-octonic acid synthetase as derived from complexes with reaction educt and product., Jelakovic S, Schulz GE, Biochemistry. 2002 Jan 29;41(4):1174-81. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11802716 11802716] |
[[Category: 3-deoxy-manno-octulosonate cytidylyltransferase]] | [[Category: 3-deoxy-manno-octulosonate cytidylyltransferase]] | ||
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
| Line 20: | Line 29: | ||
[[Category: cmp-kdo synthetase]] | [[Category: cmp-kdo synthetase]] | ||
[[Category: lipopolysaccharide biosynthesis]] | [[Category: lipopolysaccharide biosynthesis]] | ||
| - | [[Category: nucleoside monophosphate | + | [[Category: nucleoside monophosphate glycoside]] |
[[Category: nucleotidyltransferase]] | [[Category: nucleotidyltransferase]] | ||
| - | [[Category: sugar-activating | + | [[Category: sugar-activating enzyme]] |
| - | ''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 11:26:30 2008'' |
Revision as of 09:26, 20 March 2008
| |||||||
| , resolution 2.6Å | |||||||
|---|---|---|---|---|---|---|---|
| Sites: | |||||||
| Ligands: | and | ||||||
| Activity: | 3-deoxy-manno-octulosonate cytidylyltransferase, with EC number 2.7.7.38 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
THE STRUCTURE OF CMP:2-KETO-3-DEOXY-MANNO-OCTONIC ACID SYNTHETASE COMPLEXED WITH CTP AT 100K
Overview
The activation of the sugar 2-keto-3-deoxy-manno-octonic acid (Kdo) is catalyzed by CMP-Kdo synthetase (EC 2.7.7.38) and results in a monophosphate diester with CMP. The enzyme is a pharmaceutical target because CMP-Kdo is required for the biosynthesis of lipopolysaccharides that are vital for Gram-negative bacteria. We have established the structures of an enzyme complex with the educt CTP and of a complex with the product CMP-Kdo by X-ray diffraction analyses at 100 K, both at 2.6 A resolution. The N-terminal domains of the dimeric enzyme bind CTP in a peculiar nucleotide-binding fold with the beta- and gamma-phosphates located at the so-called "PP-loop", whereas the C-terminal domains participate in Kdo binding and in the dimer interface. The unstable nucleotide-sugar CMP-Kdo was produced in a crystal and stabilized by freezing to 100 K. Its formation is accompanied by an induced fit involving mainchain displacements in the 2 A range. The observed binding conformations together with the amino acid conservation pattern during evolution and the putative location of the required Mg(2+) ion suggest a reaction pathway. The enzyme is structurally homologous to the CMP-N-acetylneuraminic acid synthetases in all parts except for the dimer interface. Moreover, the chainfold and the substrate-binding positions resemble those of other enzymes processing nucleotide sugars.
About this Structure
1GQ9 is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
Catalytic mechanism of CMP:2-keto-3-deoxy-manno-octonic acid synthetase as derived from complexes with reaction educt and product., Jelakovic S, Schulz GE, Biochemistry. 2002 Jan 29;41(4):1174-81. PMID:11802716
Page seeded by OCA on Thu Mar 20 11:26:30 2008
