2i9t: Difference between revisions

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-[[Image:2i9t.gif|left|200px]]
- {{Structure
+==Structure of NF-kB p65-p50 heterodimer bound to PRDII element of B-interferon promoter==
-|PDB= 2i9t |SIZE=350|CAPTION= <scene name='initialview01'>2i9t</scene>, resolution 2.80&Aring;
+<StructureSection load='2i9t' size='340' side='right'caption='[[2i9t]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
-|SITE=
+== Structural highlights ==
-|LIGAND=
+<table><tr><td colspan='2'>[[2i9t]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2I9T OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2I9T FirstGlance]. <br>
-|ACTIVITY=
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8&#8491;</td></tr>
-|GENE= Rela, Nfkb3 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 Mus musculus]), Nfkb1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 Mus musculus])
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2i9t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2i9t OCA], [https://pdbe.org/2i9t PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2i9t RCSB], [https://www.ebi.ac.uk/pdbsum/2i9t PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2i9t ProSAT]</span></td></tr>
-}}
+</table>
+== Function ==
+[https://www.uniprot.org/uniprot/TF65_MOUSE TF65_MOUSE] NF-kappa-B is a pleiotropic transcription factor present in almost all cell types and is the endpoint of a series of signal transduction events that are initiated by a vast array of stimuli related to many biological processes such as inflammation, immunity, differentiation, cell growth, tumorigenesis and apoptosis. NF-kappa-B is a homo- or heterodimeric complex formed by the Rel-like domain-containing proteins RELA/p65, RELB, NFKB1/p105, NFKB1/p50, REL and NFKB2/p52 and the heterodimeric p65-p50 complex appears to be most abundant one. The dimers bind at kappa-B sites in the DNA of their target genes and the individual dimers have distinct preferences for different kappa-B sites that they can bind with distinguishable affinity and specificity. Different dimer combinations act as transcriptional activators or repressors, respectively. NF-kappa-B is controlled by various mechanisms of post-translational modification and subcellular compartmentalization as well as by interactions with other cofactors or corepressors. NF-kappa-B complexes are held in the cytoplasm in an inactive state complexed with members of the NF-kappa-B inhibitor (I-kappa-B) family. In a conventional activation pathway, I-kappa-B is phosphorylated by I-kappa-B kinases (IKKs) in response to different activators, subsequently degraded thus liberating the active NF-kappa-B complex which translocates to the nucleus. NF-kappa-B heterodimeric p65-p50 and p65-c-Rel complexes are transcriptional activators. The NF-kappa-B p65-p65 complex appears to be involved in invasin-mediated activation of IL-8 expression (By similarity). The inhibitory effect of I-kappa-B upon NF-kappa-B the cytoplasm is exerted primarily through the interaction with p65. p65 shows a weak DNA-binding site which could contribute directly to DNA binding in the NF-kappa-B complex. Associates with chromatin at the NF-kappa-B promoter region via association with DDX1.<ref>PMID:21131967</ref> <ref>PMID:22244329</ref>
+== 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/i9/2i9t_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=2i9t ConSurf].
+<div style="clear:both"></div>
-'''Structure of NF-kB p65-p50 heterodimer bound to PRDII element of B-interferon promoter'''
+==See Also==
+*[[NF-kB|NF-kB]]
+== References ==
-==Overview==
+<references/>
-Upon viral infection, NF-kappaB translocates to the nucleus and activates the IFN-beta gene by binding to the PRDII element. Strikingly, NF-kappaB loses its ability to activate the IFN-beta gene when the PRDII element is substituted by closely related sites. We report here the crystal structure of NF-kappaB p50/p65 heterodimer bound to the PRDII element from the IFN-beta promoter. The structure reveals an unexpected alteration in configuration, in which the p50 specificity domain moves by as much as approximately 9 A when compared to NF-kappaB heterodimer bound to the immunoglobulin kappaB site (Ig-kappaB) while maintaining the same base-specific contacts with the DNA. Taken together, the structure offers new insights into the allosteric effects of closely related DNA sites on the configuration of NF-kappaB and its transcriptional selectivity.
+__TOC__
+</StructureSection>
-==About this Structure==
+[[Category: Large Structures]]
-I9T is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2I9T OCA].
-==Reference==
-Structure of NF-kappaB p50/p65 heterodimer bound to the PRDII DNA element from the interferon-beta promoter., Escalante CR, Shen L, Thanos D, Aggarwal AK, Structure. 2002 Mar;10(3):383-91. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12005436 12005436]
 [[Category: Mus musculus]]
-[[Category: Protein complex]]
+[[Category: Aggarwal AK]]
-[[Category: Aggarwal, A K.]]
+[[Category: Escalante CR]]
-[[Category: Escalante, C R]]
+[[Category: Shen L]]
-[[Category: Shen, L.]]
+[[Category: Thanos D]]
-[[Category: Thanos, D.]]
-[[Category: protein-dna complex]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 17:26:56 2008''