View source for 2ka5


==NMR Structure of the protein TM1081==
<StructureSection load='2ka5' size='340' side='right'caption='[[2ka5]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2ka5]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermotoga_maritima Thermotoga maritima]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2KA5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2KA5 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=2ka5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ka5 OCA], [https://pdbe.org/2ka5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ka5 RCSB], [https://www.ebi.ac.uk/pdbsum/2ka5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ka5 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Y1081_THEMA Y1081_THEMA] In the phosphorylated form it could act as an anti-anti-sigma factor that counteracts an anti-sigma factor and thus releases a sigma factor from inhibition (By similarity).
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ka/2ka5_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </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/main_output.php?pdb_ID=2ka5 ConSurf].
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== Publication Abstract from PubMed ==
The JCSG has recently developed a protocol for systematic comparisons of high-quality crystal and NMR structures of proteins. In this paper, the extent to which this approach can provide function-related information on the two functionally annotated proteins TM1081, a Thermotoga maritima anti-sigma factor antagonist, and A2LD1 (gi:13879369), a mouse gamma-glutamylamine cyclotransferase, is explored. The NMR structures of the two proteins have been determined in solution at 313 and 298 K, respectively, using the current JCSG protocol based on the software package UNIO for extensive automation. The corresponding crystal structures were solved by the JCSG at 100 K and 1.6 A resolution and at 100 K and 1.9 A resolution, respectively. The NMR and crystal structures of the two proteins share the same overall molecular architectures. However, the precision of the structure determination along the amino-acid sequence varies over a significantly wider range in the NMR structures than in the crystal structures. Thereby, in each of the two NMR structures about 65% of the residues have displacements below the average and in both proteins the less well ordered residues include large parts of the active sites, in addition to some highly solvent-exposed surface areas. Whereas the latter show increased disorder in the crystal and in solution, the active-site regions display increased displacements only in the NMR structures, where they undergo local conformational exchange on the millisecond time scale that appears to be frozen in the crystals. These observations suggest that a search for molecular regions showing increased structural disorder and slow dynamic processes in solution while being well ordered in the corresponding crystal structure might be a valid initial step in the challenge of identifying putative active sites in functionally unannotated proteins with known three-dimensional structure.

Comparison of NMR and crystal structures highlights conformational isomerism in protein active sites.,Serrano P, Pedrini B, Geralt M, Jaudzems K, Mohanty B, Horst R, Herrmann T, Elsliger MA, Wilson IA, Wuthrich K Acta Crystallogr Sect F Struct Biol Cryst Commun. 2010 Oct 1;66(Pt, 10):1393-405. Epub 2010 Sep 30. PMID:20944236<ref>PMID:20944236</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Thermotoga maritima]]
[[Category: Geralt M]]
[[Category: Horst R]]
[[Category: Mohanty B]]
[[Category: Pedrini B]]
[[Category: Serrano P]]
[[Category: Wilson I]]
[[Category: Wuthrich K]]