1k6x

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{{STRUCTURE_1k6x| PDB=1k6x | SCENE= }}
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==Crystal structure of Nmra, a negative transcriptional regulator in complex with NAD at 1.5 A resolution (Trigonal form)==
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===Crystal structure of Nmra, a negative transcriptional regulator in complex with NAD at 1.5 A resolution (Trigonal form)===
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<StructureSection load='1k6x' size='340' side='right' caption='[[1k6x]], [[Resolution|resolution]] 1.50&Aring;' scene=''>
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{{ABSTRACT_PUBMED_11726498}}
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1k6x]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Emericella_nidulans Emericella nidulans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1K6X OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1K6X FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NAD:NICOTINAMIDE-ADENINE-DINUCLEOTIDE'>NAD</scene><br>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1k6i|1k6i]], [[1k6j|1k6j]]</td></tr>
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<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">nmrA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=162425 Emericella nidulans])</td></tr>
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<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1k6x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1k6x OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1k6x RCSB], [http://www.ebi.ac.uk/pdbsum/1k6x PDBsum]</span></td></tr>
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<table>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/k6/1k6x_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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/chain_selection.php?pdb_ID=2ata ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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NmrA is a negative transcriptional regulator involved in the post-translational modulation of the GATA-type transcription factor AreA, forming part of a system controlling nitrogen metabolite repression in various fungi. X-ray structures of two NmrA crystal forms, both to 1.8 A resolution, show NmrA consists of two domains, including a Rossmann fold. NmrA shows an unexpected similarity to the short-chain dehydrogenase/reductase (SDR) family, with the closest relationship to UDP-galactose 4-epimerase. We show that NAD binds to NmrA, a previously unreported nucleotide binding property for this protein. NmrA is unlikely to be an active dehydrogenase, however, as the conserved catalytic tyrosine in SDRs is absent in NmrA, and thus the nucleotide binding to NmrA could have a regulatory function. Our results suggest that other transcription factors possess the SDR fold with functions including RNA binding. The SDR fold appears to have been adapted for other roles including non-enzymatic control functions such as transcriptional regulation and is likely to be more widespread than previously recognized.
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==Function==
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The structure of the negative transcriptional regulator NmrA reveals a structural superfamily which includes the short-chain dehydrogenase/reductases.,Stammers DK, Ren J, Leslie K, Nichols CE, Lamb HK, Cocklin S, Dodds A, Hawkins AR EMBO J. 2001 Dec 3;20(23):6619-26. PMID:11726498<ref>PMID:11726498</ref>
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[[http://www.uniprot.org/uniprot/NMRA_EMENI NMRA_EMENI]] May be a redox sensor protein. Has much higher affinity for NAD(P) than for NAD(P)H. Has similar affinity for NAD and NADP. Negative transcriptional regulator involved in the post-transcriptional modulation of the GATA-type transcription factor areA, forming part of a system controlling nitrogen metabolite repression (By similarity). Interferes with the interaction between areA and target DNA. Overexpression leads to areA inhibition.<ref>PMID:17854403</ref> <ref>PMID:12764138</ref> <ref>PMID:15537757</ref> <ref>PMID:18602114</ref>
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==About this Structure==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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[[1k6x]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Emericella_nidulans Emericella nidulans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1K6X OCA].
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</div>
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:011726498</ref><references group="xtra"/><references/>
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__TOC__
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</StructureSection>
[[Category: Emericella nidulans]]
[[Category: Emericella nidulans]]
[[Category: Cocklin, S.]]
[[Category: Cocklin, S.]]

Revision as of 11:32, 3 October 2014

Crystal structure of Nmra, a negative transcriptional regulator in complex with NAD at 1.5 A resolution (Trigonal form)

1k6x, resolution 1.50Å

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