View source for 7c2b


==Crystal structure of ferredoxin: thioredoxin reductase and thioredoxin f2 complex==
<StructureSection load='7c2b' size='340' side='right'caption='[[7c2b]], [[Resolution|resolution]] 1.79&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7c2b]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7C2B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7C2B FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.7949&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NO3:NITRATE+ION'>NO3</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7c2b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7c2b OCA], [https://pdbe.org/7c2b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7c2b RCSB], [https://www.ebi.ac.uk/pdbsum/7c2b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7c2b ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/FTRC_ARATH FTRC_ARATH] Catalytic subunit of the ferredoxin-thioredoxin reductase (FTR), which catalyzes the two-electron reduction of thioredoxins by the electrons provided by reduced ferredoxin.[UniProtKB:Q55389]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Photosynthetic electron transport occurs on the thylakoid membrane of chloroplasts. Ferredoxin (Fd), the final acceptor in the electron transport chain, distributes electrons to several Fd-dependent enzymes including Fd-thioredoxin reductase (FTR). A cascade from Fd to FTR further reduces Thioredoxin (Trx), which tunes the activity of target metabolic enzymes eventually in a light-dependent manner. We previously reported that ten Trx isoforms in Arabidopsis thaliana can be clustered into three classes based on the kinetics of the FTR-dependent reduction (high-, middle-, and low-efficiency classes). In this study, we determined the X-ray structure of three electron transfer complexes of FTR and Trx isoform, Trx-y1, Trx-f2, and Trx-m2, as representative examples of each class. Superposition of the FTR structure with/without Trx showed no main chain structural changes upon complex formation. There was no significant conformational change for single and complexed Trx-m structures. Nonetheless, the interface of FTR:Trx complexes displayed significant variation. Comparative analysis of the three structures showed two types of intermolecular interactions; (i) common interactions shared by all three complexes and (ii) isoform-specific interactions, which might be important for fine tuning FTR:Trx activity. Differential electrostatic potentials of Trx isoforms may be key to isoform-specific interactions. This article is protected by copyright. All rights reserved.

Structural basis for Thioredoxin isoform-based fine tuning of Ferredoxin-Thioredoxin Reductase activity.,Juniar L, Tanaka H, Yoshida K, Hisabori T, Kurisu G Protein Sci. 2020 Oct 4. doi: 10.1002/pro.3964. PMID:33015914<ref>PMID:33015914</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7c2b" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ferredoxin thioredoxin reductase|Ferredoxin thioredoxin reductase]]
*[[Thioredoxin 3D structures|Thioredoxin 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Arabidopsis thaliana]]
[[Category: Large Structures]]
[[Category: Juniar L]]
[[Category: Kurisu G]]
[[Category: Tanaka H]]