1mmf
From Proteopedia
(New page: 200px<br /><applet load="1mmf" size="450" color="white" frame="true" align="right" spinBox="true" caption="1mmf, resolution 2.5Å" /> '''Crystal structure of ...) |
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| - | [[Image:1mmf.gif|left|200px]]<br /><applet load="1mmf" size=" | + | [[Image:1mmf.gif|left|200px]]<br /><applet load="1mmf" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1mmf, resolution 2.5Å" /> | caption="1mmf, resolution 2.5Å" /> | ||
'''Crystal structure of substrate free form of glycerol dehydratase'''<br /> | '''Crystal structure of substrate free form of glycerol dehydratase'''<br /> | ||
==Overview== | ==Overview== | ||
| - | Glycerol dehydratase (GDH) and diol dehydratase (DDH) are highly | + | Glycerol dehydratase (GDH) and diol dehydratase (DDH) are highly homologous isofunctional enzymes that catalyze the elimination of water from glycerol and 1,2-propanediol (1,2-PD) to the corresponding aldehyde via a coenzyme B(12)-dependent radical mechanism. The crystal structure of substrate free form of GDH in complex with cobalamin and K(+) has been determined at 2.5 A resolution. Its overall fold and the subunit assembly closely resemble those of DDH. Comparison of this structure and the DDH structure, available only in substrate bound form, shows the expected change of the coordination of the essential K(+) from hexacoordinate to heptacoordinate with the displacement of a single coordinated water by the substrate diol. In addition, there appears to be an increase in the rigidity of the K(+) coordination (as measured by lower B values) upon the binding of the substrate. Structural analysis of the locations of conserved residues among various GDH and DDH sequences has aided in identification of residues potentially important for substrate preference or specificity of protein-protein interactions. |
==About this Structure== | ==About this Structure== | ||
| - | 1MMF is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Klebsiella_pneumoniae Klebsiella pneumoniae] with K and B12 as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Glycerol_dehydratase Glycerol dehydratase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.1.30 4.2.1.30] Full crystallographic information is available from [http:// | + | 1MMF is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Klebsiella_pneumoniae Klebsiella pneumoniae] with <scene name='pdbligand=K:'>K</scene> and <scene name='pdbligand=B12:'>B12</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Glycerol_dehydratase Glycerol dehydratase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.1.30 4.2.1.30] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MMF OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Dotson, G.]] | [[Category: Dotson, G.]] | ||
[[Category: Emptage, M.]] | [[Category: Emptage, M.]] | ||
| - | [[Category: Liao, D | + | [[Category: Liao, D I.]] |
[[Category: Reiss, L.]] | [[Category: Reiss, L.]] | ||
[[Category: Turner, I.]] | [[Category: Turner, I.]] | ||
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[[Category: tim barrel]] | [[Category: tim barrel]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 13:56:40 2008'' |
Revision as of 11:56, 21 February 2008
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Crystal structure of substrate free form of glycerol dehydratase
Overview
Glycerol dehydratase (GDH) and diol dehydratase (DDH) are highly homologous isofunctional enzymes that catalyze the elimination of water from glycerol and 1,2-propanediol (1,2-PD) to the corresponding aldehyde via a coenzyme B(12)-dependent radical mechanism. The crystal structure of substrate free form of GDH in complex with cobalamin and K(+) has been determined at 2.5 A resolution. Its overall fold and the subunit assembly closely resemble those of DDH. Comparison of this structure and the DDH structure, available only in substrate bound form, shows the expected change of the coordination of the essential K(+) from hexacoordinate to heptacoordinate with the displacement of a single coordinated water by the substrate diol. In addition, there appears to be an increase in the rigidity of the K(+) coordination (as measured by lower B values) upon the binding of the substrate. Structural analysis of the locations of conserved residues among various GDH and DDH sequences has aided in identification of residues potentially important for substrate preference or specificity of protein-protein interactions.
About this Structure
1MMF is a Protein complex structure of sequences from Klebsiella pneumoniae with and as ligands. Active as Glycerol dehydratase, with EC number 4.2.1.30 Full crystallographic information is available from OCA.
Reference
Crystal structure of substrate free form of glycerol dehydratase., Liao DI, Dotson G, Turner I Jr, Reiss L, Emptage M, J Inorg Biochem. 2003 Jan 1;93(1-2):84-91. PMID:12538056
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