1mp0
From Proteopedia
(New page: 200px<br /> <applet load="1mp0" size="450" color="white" frame="true" align="right" spinBox="true" caption="1mp0, resolution 2.20Å" /> '''Binary Complex of H...) |
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| - | [[Image:1mp0. | + | [[Image:1mp0.jpg|left|200px]]<br /><applet load="1mp0" size="350" color="white" frame="true" align="right" spinBox="true" |
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caption="1mp0, resolution 2.20Å" /> | caption="1mp0, resolution 2.20Å" /> | ||
'''Binary Complex of Human Glutathione-Dependent Formaldehyde Dehydrogenase with NAD(H)'''<br /> | '''Binary Complex of Human Glutathione-Dependent Formaldehyde Dehydrogenase with NAD(H)'''<br /> | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1MP0 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with ZN, K, PO4 and NAD as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http:// | + | 1MP0 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with <scene name='pdbligand=ZN:'>ZN</scene>, <scene name='pdbligand=K:'>K</scene>, <scene name='pdbligand=PO4:'>PO4</scene> and <scene name='pdbligand=NAD:'>NAD</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MP0 OCA]. |
==Reference== | ==Reference== | ||
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[[Category: mad]] | [[Category: mad]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri Feb 15 16:25:01 2008'' |
Revision as of 14:25, 15 February 2008
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Binary Complex of Human Glutathione-Dependent Formaldehyde Dehydrogenase with NAD(H)
Overview
Human Class III alcohol dehydrogenase (ADH), also known as, glutathione-dependent formaldehyde dehydrogenase plays an important role, in the formaldehyde detoxification and reduction of the nitric oxide, metabolite s-nitrosoglutathione (GSNO). It follows a random bi bi kinetic, mechanism and prefers bulkier substrates like long chain primary alcohols, and glutathione adducts like s-hydroxymethylglutathione and GSNO over, smaller alcohols like ethanol. The structure of the FDH.NAD(H) binary, complex reported here, in conjunction with the other complexes of FDH, provide the structural basis of the kinetic observations. These structures, show that the apoenzyme has a semi-open domain conformation that permits, random random addition of alcohol or NAD(H). Moreover, there is no, significant domain movement upon binding of the coenzyme or the substrate, 12-hydroxydodecanoic acid. Interestingly, two active site zinc, coordination environments are observed in FDH. In the apoenzyme, the, active site zinc is coordinated to Cys44, His66, Cys173 and a water, molecule. In the FDH.NAD(H) binary complex reported here, Glu67 is added, to the coordination environment of the active site zinc and the distance, between the water molecule and zinc is increased. This change in the zinc, coordination, brought about by the displacement of zinc of about 2 A, towards Glu67 could promote substrate exchange at the active site metal, during catalysis.
About this Structure
1MP0 is a Single protein structure of sequence from Homo sapiens with , , and as ligands. Full crystallographic information is available from OCA.
Reference
Structure-function relationships in human Class III alcohol dehydrogenase (formaldehyde dehydrogenase)., Sanghani PC, Robinson H, Bennett-Lovsey R, Hurley TD, Bosron WF, Chem Biol Interact. 2003 Feb 1;143-144:195-200. PMID:12604204
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