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1zka

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Revision as of 15:36, 12 October 2017

NF-kB RelB forms an intertwined homodimer, Y300S mutant

Structural highlights

1zka is a 1 chain structure with sequence from Lk3 transgenic mice. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1zk9
Gene:	Relb (LK3 transgenic mice)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[RELB_MOUSE] NF-kappa-B is a pleiotropic transcription factor which is present in almost all cell types and is involved in many biological processed 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. 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 RelB-p50 and RelB-p52 complexes are transcriptional activators. RELB neither associates with DNA nor with RELA/p65 or REL. Stimulates promoter activity in the presence of NFKB2/p49 (By similarity). As a member of the NUPR1/RELB/IER3 survival pathway, may allow the development of pancreatic intraepithelial neoplasias.^[1]

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 PubMed

The X-ray structure of the RelB dimerization domain (DD) reveals that the RelBDD assumes an unexpected intertwined fold topology atypical of other NF-kappaB dimers. All typical NF-kappaB dimers are formed by the association of two independently folded immunoglobulin (Ig) domains. In RelBDD, two polypeptides reconstruct both Ig domains in the dimer with an extra beta sheet connecting the two domains. Residues most critical to NF-kappaB dimer formation are invariant in RelB, and Y300 plays a positive role in RelBDD dimer formation. The presence of RelB-specific nonpolar residues at the surface removes several intradomain surface hydrogen bonds that may render the domain fold unstable. Intertwining may stabilize the RelBDD homodimer by forming the extra beta sheet. We show that, as in the crystal, RelB forms an intertwined homodimer in solution. We suggest that the transiently stable RelB homodimer might prevent its rapid degradation, allowing for heterodimer formation with p50 and p52.

NF-kappaB RelB forms an intertwined homodimer.,Huang DB, Vu D, Ghosh G Structure. 2005 Sep;13(9):1365-73. PMID:16154093^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Hamidi T, Algul H, Cano CE, Sandi MJ, Molejon MI, Riemann M, Calvo EL, Lomberk G, Dagorn JC, Weih F, Urrutia R, Schmid RM, Iovanna JL. Nuclear protein 1 promotes pancreatic cancer development and protects cells from stress by inhibiting apoptosis. J Clin Invest. 2012 Jun 1;122(6):2092-103. doi: 10.1172/JCI60144. Epub 2012 May, 8. PMID:22565310 doi:10.1172/JCI60144
↑ Huang DB, Vu D, Ghosh G. NF-kappaB RelB forms an intertwined homodimer. Structure. 2005 Sep;13(9):1365-73. PMID:16154093 doi:10.1016/j.str.2005.06.018

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1zka"

@@ Line 1: / Line 1: @@
 ==NF-kB RelB forms an intertwined homodimer, Y300S mutant==
 <StructureSection load='1zka' size='340' side='right' caption='[[1zka]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1zk9|1zk9]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Relb ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1zka FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zka OCA], [http://pdbe.org/1zka PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1zka RCSB], [http://www.ebi.ac.uk/pdbsum/1zka PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1zka FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zka OCA], [http://pdbe.org/1zka PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1zka RCSB], [http://www.ebi.ac.uk/pdbsum/1zka PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1zka ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 17: / Line 18: @@
     <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/chain_selection.php?pdb_ID=2ata ConSurf].
+</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=1zka ConSurf].
 <div style="clear:both"></div>
 <div style="background-color:#fffaf0;">

1zka

From Proteopedia

Revision as of 15:36, 12 October 2017

NF-kB RelB forms an intertwined homodimer, Y300S mutant

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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