1ezw
From Proteopedia
(New page: 200px<br /><applet load="1ezw" size="450" color="white" frame="true" align="right" spinBox="true" caption="1ezw, resolution 1.65Å" /> '''STRUCTURE OF COENZYM...) |
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| - | [[Image:1ezw.jpg|left|200px]]<br /><applet load="1ezw" size=" | + | [[Image:1ezw.jpg|left|200px]]<br /><applet load="1ezw" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1ezw, resolution 1.65Å" /> | caption="1ezw, resolution 1.65Å" /> | ||
'''STRUCTURE OF COENZYME F420 DEPENDENT TETRAHYDROMETHANOPTERIN REDUCTASE FROM METHANOPYRUS KANDLERI'''<br /> | '''STRUCTURE OF COENZYME F420 DEPENDENT TETRAHYDROMETHANOPTERIN REDUCTASE FROM METHANOPYRUS KANDLERI'''<br /> | ||
==Overview== | ==Overview== | ||
| - | Coenzyme F(420)-dependent methylenetetrahydromethanopterin reductase (Mer) | + | Coenzyme F(420)-dependent methylenetetrahydromethanopterin reductase (Mer) is an enzyme of the Cl metabolism in methanogenic and sulfate reducing archaea. It is composed of identical 35-40 kDa subunits and lacks a prosthetic group. The crystal structure of Mer from Methanopyrus kandleri (kMer) revealed in one crystal form a dimeric and in another a tetrameric oligomerisation state and that from Methanobacterium thermoautotrophicum (tMer) a dimeric state. Each monomer is primarily composed of a TIM-barrel fold enlarged by three insertion regions. Insertion regions 1 and 2 contribute to intersubunit interactions. Insertion regions 2 and 3 together with the C-terminal end of the TIM-barrel core form a cleft where the binding sites of coenzyme F(420) and methylene-tetrahydromethanopterin are postulated. Close to the coenzyme F(420)-binding site lies a rarely observed non-prolyl cis-peptide bond. It is surprising that Mer is structurally most similar to a bacterial FMN-dependent luciferase which contains a non-prolyl cis-peptide bond at the equivalent position. The structure of Mer is also related to that of NADP-dependent FAD-harbouring methylenetetrahydrofolate reductase (MetF). However, Mer and MetF do not show sequence similarities although they bind related substrates and catalyze an analogous reaction. |
==About this Structure== | ==About this Structure== | ||
| - | 1EZW is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Methanopyrus_kandleri Methanopyrus kandleri] with MG and CL as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http:// | + | 1EZW is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Methanopyrus_kandleri Methanopyrus kandleri] with <scene name='pdbligand=MG:'>MG</scene> and <scene name='pdbligand=CL:'>CL</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EZW OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Grabarse, W.]] | [[Category: Grabarse, W.]] | ||
[[Category: Shima, S.]] | [[Category: Shima, S.]] | ||
| - | [[Category: Thauer, R | + | [[Category: Thauer, R K.]] |
[[Category: Warkentin, E.]] | [[Category: Warkentin, E.]] | ||
[[Category: CL]] | [[Category: CL]] | ||
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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 12:33:21 2008'' |
Revision as of 10:33, 21 February 2008
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STRUCTURE OF COENZYME F420 DEPENDENT TETRAHYDROMETHANOPTERIN REDUCTASE FROM METHANOPYRUS KANDLERI
Overview
Coenzyme F(420)-dependent methylenetetrahydromethanopterin reductase (Mer) is an enzyme of the Cl metabolism in methanogenic and sulfate reducing archaea. It is composed of identical 35-40 kDa subunits and lacks a prosthetic group. The crystal structure of Mer from Methanopyrus kandleri (kMer) revealed in one crystal form a dimeric and in another a tetrameric oligomerisation state and that from Methanobacterium thermoautotrophicum (tMer) a dimeric state. Each monomer is primarily composed of a TIM-barrel fold enlarged by three insertion regions. Insertion regions 1 and 2 contribute to intersubunit interactions. Insertion regions 2 and 3 together with the C-terminal end of the TIM-barrel core form a cleft where the binding sites of coenzyme F(420) and methylene-tetrahydromethanopterin are postulated. Close to the coenzyme F(420)-binding site lies a rarely observed non-prolyl cis-peptide bond. It is surprising that Mer is structurally most similar to a bacterial FMN-dependent luciferase which contains a non-prolyl cis-peptide bond at the equivalent position. The structure of Mer is also related to that of NADP-dependent FAD-harbouring methylenetetrahydrofolate reductase (MetF). However, Mer and MetF do not show sequence similarities although they bind related substrates and catalyze an analogous reaction.
About this Structure
1EZW is a Single protein structure of sequence from Methanopyrus kandleri with and as ligands. Full crystallographic information is available from OCA.
Reference
Structure of coenzyme F(420) dependent methylenetetrahydromethanopterin reductase from two methanogenic archaea., Shima S, Warkentin E, Grabarse W, Sordel M, Wicke M, Thauer RK, Ermler U, J Mol Biol. 2000 Jul 21;300(4):935-50. PMID:10891279
Page seeded by OCA on Thu Feb 21 12:33:21 2008
Categories: Methanopyrus kandleri | Single protein | Ermler, U. | Grabarse, W. | Shima, S. | Thauer, R K. | Warkentin, E. | CL | MG | (beta | Alpha)8 barrel | Tim barrel
