2pvo

From Proteopedia

(Difference between revisions)
Jump to: navigation, search
Line 1: Line 1:
-
[[Image:2pvo.jpg|left|200px]]<br /><applet load="2pvo" size="350" color="white" frame="true" align="right" spinBox="true"
+
[[Image:2pvo.jpg|left|200px]]
-
caption="2pvo, resolution 3.400&Aring;" />
+
 
-
'''Crystal srtucture of the ternary complex between thioredoxin f, ferredoxin, and ferredoxin: thioredoxin reductase'''<br />
+
{{Structure
 +
|PDB= 2pvo |SIZE=350|CAPTION= <scene name='initialview01'>2pvo</scene>, resolution 3.400&Aring;
 +
|SITE=
 +
|LIGAND= <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene> and <scene name='pdbligand=FES:FE2/S2 (INORGANIC) CLUSTER'>FES</scene>
 +
|ACTIVITY=
 +
|GENE= ftrC ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1143 Synechocystis sp.]), ftrV ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1143 Synechocystis sp.]), petF, fed ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1143 Synechocystis sp.])
 +
}}
 +
 
 +
'''Crystal srtucture of the ternary complex between thioredoxin f, ferredoxin, and ferredoxin: thioredoxin reductase'''
 +
 
==Overview==
==Overview==
Line 7: Line 16:
==About this Structure==
==About this Structure==
-
2PVO is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Spinacia_oleracea Spinacia oleracea] and [http://en.wikipedia.org/wiki/Synechocystis_sp. Synechocystis sp.] with <scene name='pdbligand=SO4:'>SO4</scene>, <scene name='pdbligand=SF4:'>SF4</scene> and <scene name='pdbligand=FES:'>FES</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PVO OCA].
+
2PVO is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Spinacia_oleracea Spinacia oleracea] and [http://en.wikipedia.org/wiki/Synechocystis_sp. Synechocystis sp.]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PVO OCA].
==Reference==
==Reference==
-
Structural snapshots along the reaction pathway of ferredoxin-thioredoxin reductase., Dai S, Friemann R, Glauser DA, Bourquin F, Manieri W, Schurmann P, Eklund H, Nature. 2007 Jul 5;448(7149):92-6. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=17611542 17611542]
+
Structural snapshots along the reaction pathway of ferredoxin-thioredoxin reductase., Dai S, Friemann R, Glauser DA, Bourquin F, Manieri W, Schurmann P, Eklund H, Nature. 2007 Jul 5;448(7149):92-6. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17611542 17611542]
[[Category: Protein complex]]
[[Category: Protein complex]]
[[Category: Spinacia oleracea]]
[[Category: Spinacia oleracea]]
Line 23: Line 32:
[[Category: thioredoxin]]
[[Category: thioredoxin]]
-
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 18:33:27 2008''
+
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 18:17:58 2008''

Revision as of 16:17, 20 March 2008


PDB ID 2pvo

Drag the structure with the mouse to rotate
, resolution 3.400Å
Ligands: , and
Gene: ftrC (Synechocystis sp.), ftrV (Synechocystis sp.), petF, fed (Synechocystis sp.)
Coordinates: save as pdb, mmCIF, xml



Crystal srtucture of the ternary complex between thioredoxin f, ferredoxin, and ferredoxin: thioredoxin reductase


Overview

Oxygen-evolving photosynthetic organisms regulate carbon metabolism through a light-dependent redox signalling pathway. Electrons are shuttled from photosystem I by means of ferredoxin (Fdx) to ferredoxin-thioredoxin reductase (FTR), which catalyses the two-electron-reduction of chloroplast thioredoxins (Trxs). These modify target enzyme activities by reduction, regulating carbon flow. FTR is unique in its use of a [4Fe-4S] cluster and a proximal disulphide bridge in the conversion of a light signal into a thiol signal. We determined the structures of FTR in both its one- and its two-electron-reduced intermediate states and of four complexes in the pathway, including the ternary Fdx-FTR-Trx complex. Here we show that, in the first complex (Fdx-FTR) of the pathway, the Fdx [2Fe-2S] cluster is positioned suitably for electron transfer to the FTR [4Fe-4S] centre. After the transfer of one electron, an intermediate is formed in which one sulphur atom of the FTR active site is free to attack a disulphide bridge in Trx and the other sulphur atom forms a fifth ligand for an iron atom in the FTR [4Fe-4S] centre--a unique structure in biology. Fdx then delivers a second electron that cleaves the FTR-Trx heterodisulphide bond, which occurs in the Fdx-FTR-Trx complex. In this structure, the redox centres of the three proteins are aligned to maximize the efficiency of electron transfer from the Fdx [2Fe-2S] cluster to the active-site disulphide of Trxs. These results provide a structural framework for understanding the mechanism of disulphide reduction by an iron-sulphur enzyme and describe previously unknown interaction networks for both Fdx and Trx (refs 4-6).

About this Structure

2PVO is a Protein complex structure of sequences from Spinacia oleracea and Synechocystis sp.. Full crystallographic information is available from OCA.

Reference

Structural snapshots along the reaction pathway of ferredoxin-thioredoxin reductase., Dai S, Friemann R, Glauser DA, Bourquin F, Manieri W, Schurmann P, Eklund H, Nature. 2007 Jul 5;448(7149):92-6. PMID:17611542

Page seeded by OCA on Thu Mar 20 18:17:58 2008

Proteopedia Page Contributors and Editors (what is this?)

OCA

Personal tools