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==NMR STRUCTURES OF CHLOROPLAST THIOREDOXIN M CH2 FROM THE GREEN ALGA CHLAMYDOMONAS REINHARDTII== | ==NMR STRUCTURES OF CHLOROPLAST THIOREDOXIN M CH2 FROM THE GREEN ALGA CHLAMYDOMONAS REINHARDTII== | ||
<StructureSection load='1dby' size='340' side='right' caption='[[1dby | <StructureSection load='1dby' size='340' side='right'caption='[[1dby]]' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1dby]] is a 1 chain structure with sequence from [ | <table><tr><td colspan='2'>[[1dby]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Chlamydomonas_reinhardtii Chlamydomonas reinhardtii]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DBY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DBY FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR, 28 models</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=1dby FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dby OCA], [https://pdbe.org/1dby PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1dby RCSB], [https://www.ebi.ac.uk/pdbsum/1dby PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1dby ProSAT]</span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/TRXM_CHLRE TRXM_CHLRE] Participates in various redox reactions through the reversible oxidation of the active center dithiol to a disulfide. The M form is known to activate NADP-malate dehydrogenase (By similarity). | |||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/db/1dby_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/db/1dby_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/ | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </jmolCheckbox> | ||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/ | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1dby ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
| Line 25: | Line 27: | ||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 1dby" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
*[[Thioredoxin|Thioredoxin]] | *[[Thioredoxin 3D structures|Thioredoxin 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
| Line 33: | Line 36: | ||
</StructureSection> | </StructureSection> | ||
[[Category: Chlamydomonas reinhardtii]] | [[Category: Chlamydomonas reinhardtii]] | ||
[[Category: Blackledge | [[Category: Large Structures]] | ||
[[Category: Guilhaudis | [[Category: Blackledge MJ]] | ||
[[Category: Krimm | [[Category: Guilhaudis L]] | ||
[[Category: Lancelin | [[Category: Krimm I]] | ||
[[Category: Marion | [[Category: Lancelin J-M]] | ||
[[Category: Marion D]] | |||
Latest revision as of 07:27, 17 October 2024
NMR STRUCTURES OF CHLOROPLAST THIOREDOXIN M CH2 FROM THE GREEN ALGA CHLAMYDOMONAS REINHARDTIINMR STRUCTURES OF CHLOROPLAST THIOREDOXIN M CH2 FROM THE GREEN ALGA CHLAMYDOMONAS REINHARDTII
Structural highlights
FunctionTRXM_CHLRE Participates in various redox reactions through the reversible oxidation of the active center dithiol to a disulfide. The M form is known to activate NADP-malate dehydrogenase (By similarity). Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedChloroplast thioredoxin m from the green alga Chlamydomomas reinhardtii is very efficiently reduced in vitro and in vivo in the presence of photoreduced ferredoxin and a ferredoxin dependent ferredoxin-thioredoxin reductase. Once reduced, thioredoxin m has the capability to quickly activate the NADP malate dehydrogenase (EC 1.1.1.82) a regulatory enzyme involved in an energy-dependent assimilation of carbon dioxide in C4 plants. This activation is the result of the reduction of two disulfide bridges by thioredoxin m, that are located at the N- and C-terminii of the NADP malate dehydrogenase. The molecular structure of thioredoxin m was solved using NMR and compared to other known thioredoxins. Thioredoxin m belongs to the prokaryotic type of thioredoxin, which is divergent from the eukaryotic-type thioredoxins also represented in plants by the h (cytosolic) and f (chloroplastic) types of thioredoxins. The dynamics of the molecule have been assessed using (15)N relaxation data and are found to correlate well with regions of disorder found in the calculated NMR ensemble. The results obtained provide a novel basis to interpret the thioredoxin dependence of the activation of chloroplast NADP-malate dehydrogenase. The specific catalytic mechanism that takes place in the active site of thioredoxins is also discussed on the basis of the recent new understanding and especially in the light of the dual general acid-base catalysis exerted on the two cysteines of the redox active site. It is proposed that the two cysteines of the redox active site may insulate each other from solvent attack by specific packing of invariable hydrophobic amino acids. NMR structures of thioredoxin m from the green alga Chlamydomonas reinhardtii.,Lancelin JM, Guilhaudis L, Krimm I, Blackledge MJ, Marion D, Jacquot JP Proteins. 2000 Nov 15;41(3):334-49. PMID:11025545[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences |
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