1ti7: Difference between revisions

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{{Seed}}
[[Image:1ti7.png|left|200px]]


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==CRYSTAL STRUCTURE OF NMRA, A NEGATIVE TRANSCRIPTIONAL REGULATOR, IN COMPLEX WITH NADP AT 1.7A RESOLUTION==
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<StructureSection load='1ti7' size='340' side='right'caption='[[1ti7]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
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== Structural highlights ==
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
<table><tr><td colspan='2'>[[1ti7]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Aspergillus_nidulans Aspergillus nidulans]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1pds 1pds]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TI7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1TI7 FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.7&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</scene></td></tr>
{{STRUCTURE_1ti7|  PDB=1ti7  |  SCENE=  }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1ti7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ti7 OCA], [https://pdbe.org/1ti7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ti7 RCSB], [https://www.ebi.ac.uk/pdbsum/1ti7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ti7 ProSAT]</span></td></tr>
</table>
== Function ==
[https://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>
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
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    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ti/1ti7_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=1ti7 ConSurf].
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== Publication Abstract from PubMed ==
NmrA, a transcription repressor involved in the regulation of nitrogen metabolism in Aspergillus nidulans,is a member of the short-chain dehydrogenase reductase superfamily. Isothermal titration calorimetry and differential scanning calorimetry have been used to show NmrA binds NAD+ and NADP+ with similar affinity (average KD 65 microM) but has a greatly reduced affinity for NADH and NADPH (average KD 6.0 mM). The structure of NmrA in a complex with NADP+ reveals how repositioning a His-37 side chain allows the different conformations of NAD+ and NADP+ to be accommodated. Modeling NAD(P)H into NmrA indicated that steric clashes, attenuation of electrostatic interactions, and loss of aromatic ring stacking can explain the differing affinities of NAD(P)+/NAD(P)H. The ability of NmrA to discriminate between the oxidized and reduced forms of the dinucleotides may be linked to a possible role in redox sensing. Isothermal titration calorimetry demonstrated that NmrA and a C-terminal fragment of the GATA transcription factor AreA interacted with a 1:1 stoichiometry and an apparent KD of 0.26 microM. NmrA was unable to bind the nitrogen metabolite repression signaling molecules ammonium or glutamine.


===CRYSTAL STRUCTURE OF NMRA, A NEGATIVE TRANSCRIPTIONAL REGULATOR, IN COMPLEX WITH NADP AT 1.7A RESOLUTION===
The negative transcriptional regulator NmrA discriminates between oxidized and reduced dinucleotides.,Lamb HK, Leslie K, Dodds AL, Nutley M, Cooper A, Johnson C, Thompson P, Stammers DK, Hawkins AR J Biol Chem. 2003 Aug 22;278(34):32107-14. Epub 2003 May 22. PMID:12764138<ref>PMID:12764138</ref>


 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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(as it appears on PubMed at http://www.pubmed.gov), where 12764138 is the PubMed ID number.
== References ==
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<references/>
{{ABSTRACT_PUBMED_12764138}}
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</StructureSection>
==About this Structure==
[[Category: Aspergillus nidulans]]
1TI7 is a 1 chain structure of sequence from [http://en.wikipedia.org/wiki/Emericella_nidulans Emericella nidulans]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1pds 1pds]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TI7 OCA].
[[Category: Large Structures]]
 
[[Category: Cooper A]]
==Reference==
[[Category: Dodds AL]]
<ref group="xtra">PMID:12764138</ref><ref group="xtra">PMID:11726498</ref><ref group="xtra">PMID:11679757</ref><references group="xtra"/>
[[Category: Hawkins AR]]
[[Category: Emericella nidulans]]
[[Category: Johnson C]]
[[Category: Cooper, A.]]
[[Category: Lamb HK]]
[[Category: Dodds, A L.]]
[[Category: Leslie K]]
[[Category: Hawkins, A R.]]
[[Category: Nutley M]]
[[Category: Johnson, C.]]
[[Category: Stammers DK]]
[[Category: Lamb, H K.]]
[[Category: Thompson P]]
[[Category: Leslie, K.]]
[[Category: Nutley, M.]]
[[Category: Stammers, D K.]]
[[Category: Thompson, P.]]
[[Category: Dehydrogenase]]
[[Category: Nadp binding]]
[[Category: Nmra]]
[[Category: Reductase]]
[[Category: Rossmann fold]]
[[Category: Short chain]]
[[Category: Transcriptional regulation]]
 
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Retrieved from "https://proteopedia.org/1ti7"