2jgv
From Proteopedia
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==Overview== | ==Overview== | ||
| - | High resolution structures of Staphylococcus aureus d-tagatose-6-phosphate | + | High resolution structures of Staphylococcus aureus d-tagatose-6-phosphate kinase (LacC) in two crystal forms are herein reported. The structures define LacC in apoform, in binary complexes with ADP or the co-factor analogue AMP-PNP, and in a ternary complex with AMP-PNP and D-tagatose-6-phosphate. The tertiary structure of the LacC monomer, which is closely related to other members of the pfkB subfamily of carbohydrate kinases, is composed of a large alpha/beta core domain and a smaller, largely beta "lid." Four extended polypeptide segments connect these two domains. Dimerization of LacC occurs via interactions between lid domains, which come together to form a beta-clasp structure. Residues from both subunits contribute to substrate binding. LacC adopts a closed structure required for phosphoryl transfer only when both substrate and co-factor are bound. A reaction mechanism similar to that used by other phosphoryl transferases is proposed, although unusually, when both substrate and co-factor are bound to the enzyme two Mg(2+) ions are observed in the active site. A new motif of amino acid sequence conservation common to the pfkB subfamily of carbohydrate kinases is identified. |
==About this Structure== | ==About this Structure== | ||
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[[Category: Staphylococcus aureus]] | [[Category: Staphylococcus aureus]] | ||
[[Category: Tagatose-6-phosphate kinase]] | [[Category: Tagatose-6-phosphate kinase]] | ||
| - | [[Category: Hunter, W | + | [[Category: Hunter, W N.]] |
| - | [[Category: Leonard, G | + | [[Category: Leonard, G A.]] |
| - | [[Category: Mcsweeney, S | + | [[Category: Mcsweeney, S M.]] |
[[Category: Miallau, L.]] | [[Category: Miallau, L.]] | ||
[[Category: ADP]] | [[Category: ADP]] | ||
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[[Category: transferase]] | [[Category: transferase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 18:03:10 2008'' |
Revision as of 16:03, 21 February 2008
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STRUCTURE OF STAPHYLOCOCCUS AUREUS D-TAGATOSE-6-PHOSPHATE KINASE IN COMPLEX WITH ADP
Overview
High resolution structures of Staphylococcus aureus d-tagatose-6-phosphate kinase (LacC) in two crystal forms are herein reported. The structures define LacC in apoform, in binary complexes with ADP or the co-factor analogue AMP-PNP, and in a ternary complex with AMP-PNP and D-tagatose-6-phosphate. The tertiary structure of the LacC monomer, which is closely related to other members of the pfkB subfamily of carbohydrate kinases, is composed of a large alpha/beta core domain and a smaller, largely beta "lid." Four extended polypeptide segments connect these two domains. Dimerization of LacC occurs via interactions between lid domains, which come together to form a beta-clasp structure. Residues from both subunits contribute to substrate binding. LacC adopts a closed structure required for phosphoryl transfer only when both substrate and co-factor are bound. A reaction mechanism similar to that used by other phosphoryl transferases is proposed, although unusually, when both substrate and co-factor are bound to the enzyme two Mg(2+) ions are observed in the active site. A new motif of amino acid sequence conservation common to the pfkB subfamily of carbohydrate kinases is identified.
About this Structure
2JGV is a Single protein structure of sequence from Staphylococcus aureus with as ligand. Active as Tagatose-6-phosphate kinase, with EC number 2.7.1.144 Known structural/functional Site: . Full crystallographic information is available from OCA.
Reference
Structures of Staphylococcus aureus D-tagatose-6-phosphate kinase implicate domain motions in specificity and mechanism., Miallau L, Hunter WN, McSweeney SM, Leonard GA, J Biol Chem. 2007 Jul 6;282(27):19948-57. Epub 2007 Apr 25. PMID:17459874
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