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==CRYSTAL STRUCTURE OF THIOREDOXIN F FROM SPINACH CHLOROPLAST (LONG FORM)== | ==CRYSTAL STRUCTURE OF THIOREDOXIN F FROM SPINACH CHLOROPLAST (LONG FORM)== | ||
<StructureSection load='1faa' size='340' side='right' caption='[[1faa]], [[Resolution|resolution]] 1.85Å' scene=''> | <StructureSection load='1faa' size='340' side='right'caption='[[1faa]], [[Resolution|resolution]] 1.85Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1faa]] is a 1 chain structure with sequence from [ | <table><tr><td colspan='2'>[[1faa]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Spinacia_oleracea Spinacia oleracea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FAA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1FAA 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">X-ray diffraction, [[Resolution|Resolution]] 1.85Å</td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1faa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1faa OCA], [https://pdbe.org/1faa PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1faa RCSB], [https://www.ebi.ac.uk/pdbsum/1faa PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1faa ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/TRXF_SPIOL TRXF_SPIOL] Participates in various redox reactions through the reversible oxidation of the active center dithiol to a disulfide. The F form is known to activate a number of enzymes of the photosynthetic carbon cycle. | |||
== 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/fa/1faa_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/fa/1faa_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=1faa ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
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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 1faa" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
*[[Thioredoxin|Thioredoxin]] | *[[Thioredoxin 3D structures|Thioredoxin 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | |||
[[Category: Spinacia oleracea]] | [[Category: Spinacia oleracea]] | ||
[[Category: Capitani | [[Category: Capitani G]] | ||
[[Category: DelVal | [[Category: DelVal G]] | ||
[[Category: Jansonius | [[Category: Jansonius JN]] | ||
[[Category: Markovic-Housley | [[Category: Markovic-Housley Z]] | ||
[[Category: Morris | [[Category: Morris M]] | ||
[[Category: Schurmann | [[Category: Schurmann P]] | ||
Latest revision as of 07:30, 17 October 2024
CRYSTAL STRUCTURE OF THIOREDOXIN F FROM SPINACH CHLOROPLAST (LONG FORM)CRYSTAL STRUCTURE OF THIOREDOXIN F FROM SPINACH CHLOROPLAST (LONG FORM)
Structural highlights
FunctionTRXF_SPIOL Participates in various redox reactions through the reversible oxidation of the active center dithiol to a disulfide. The F form is known to activate a number of enzymes of the photosynthetic carbon cycle. 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 PubMedThioredoxins are small ubiquitous proteins which act as general protein disulfide reductases in living cells. Chloroplasts contain two distinct thioredoxins ( f and m) with different phylogenetic origin. Both act as enzyme regulatory proteins but have different specificities towards target enzymes. Thioredoxin f (Trx f), which shares only low sequence identity with thioredoxin m (Trx m) and with all other known thioredoxins, activates enzymes of the Calvin cycle and other photosynthetic processes. Trx m shows high sequence similarity with bacterial thioredoxins and activates other chloroplast enzymes. The here described structural studies of the two chloroplast thioredoxins were carried out in order to gain insight into the structure/function relationships of these proteins. Crystal structures were determined for oxidized, recombinant thioredoxin f (Trx f-L) and at the N terminus truncated form of it (Trx f-S), as well as for oxidized and reduced thioredoxin m (at 2.1 and 2.3 A resolution, respectively). Whereas thioredoxin f crystallized as a monomer, both truncated thioredoxin f and thioredoxin m crystallized as non-covalent dimers. The structures of thioredoxins f and m exhibit the typical thioredoxin fold consisting of a central twisted five-stranded beta-sheet surrounded by four alpha-helices. Thioredoxin f contains an additional alpha-helix at the N terminus and an exposed third cysteine close to the active site. The overall three-dimensional structures of the two chloroplast thioredoxins are quite similar. However, the two proteins have a significantly different surface topology and charge distribution around the active site. An interesting feature which might significantly contribute to the specificity of thioredoxin f is an inherent flexibility of its active site, which has expressed itself crystallographically in two different crystal forms. Crystal structures of two functionally different thioredoxins in spinach chloroplasts.,Capitani G, Markovic-Housley Z, DelVal G, Morris M, Jansonius JN, Schurmann P J Mol Biol. 2000 Sep 8;302(1):135-54. PMID:10964566[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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