1r2b

From Proteopedia

(Difference between revisions)

Revision as of 07:15, 6 January 2015

Crystal structure of the BCL6 BTB domain complexed with a SMRT co-repressor peptide

Structural highlights

1r2b is a 4 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1r28, 1r29
Gene:	BCL6 (Homo sapiens), NCOR2 OR CTG26 (Homo sapiens)
Resources:	FirstGlance, OCA, RCSB, PDBsum

Disease

[BCL6_HUMAN] Note=Chromosomal aberrations involving BCL6 may be a cause of B-cell non-Hodgkin lymphoma. Translocation t(3;14)(q27;q32); translocation t(3;22)(q27;q11) with immunoglobulin gene regions. Note=A chromosomal aberration involving BCL6 may be a cause of a form of B-cell leukemia. Translocation t(3;11)(q27;q23) with POU2AF1/OBF1. Note=A chromosomal aberration involving BCL6 may be a cause of lymphoma. Translocation t(3;4)(q27;p11) with ARHH/TTF.

Function

[BCL6_HUMAN] Transcriptional repressor which is required for germinal center formation and antibody affinity maturation. Probably plays an important role in lymphomagenesis.^[1] ^[2] [NCOR2_HUMAN] Transcriptional corepressor of NR4A2/NURR1 and acts through histone deacetylases (HDACs) to keep promoters of NR4A2/NURR1 target genes in a repressed deacetylated state (By similarity). Mediates the transcriptional repression activity of some nuclear receptors by promoting chromatin condensation, thus preventing access of the basal transcription. Isoform 1 and isoform 5 have different affinities for different nuclear receptors.

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

BCL6 encodes a transcription factor that represses genes necessary for the terminal differentiation of lymphocytes within germinal centers, and the misregulated expression of this factor is strongly implicated in several types of B cell lymphoma. The homodimeric BTB domain of BCL6 (also known as the POZ domain) is required for the repression activity of the protein and interacts directly with the SMRT and N-CoR corepressors that are found within large multiprotein histone deacetylase-containing complexes. We have identified a 17 residue fragment from SMRT that binds to the BCL6 BTB domain, and determined the crystal structure of the complex to 2.2 A. Two SMRT fragments bind symmetrically to the BCL6 BTB homodimer and, in combination with biochemical and in vivo data, the structure provides insight into the basis of transcriptional repression by this critical B cell lymphoma protein.

Mechanism of SMRT corepressor recruitment by the BCL6 BTB domain.,Ahmad KF, Melnick A, Lax S, Bouchard D, Liu J, Kiang CL, Mayer S, Takahashi S, Licht JD, Prive GG Mol Cell. 2003 Dec;12(6):1551-64. PMID:14690607^[3]

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

References

↑ Niu H, Ye BH, Dalla-Favera R. Antigen receptor signaling induces MAP kinase-mediated phosphorylation and degradation of the BCL-6 transcription factor. Genes Dev. 1998 Jul 1;12(13):1953-61. PMID:9649500
↑ Ghetu AF, Corcoran CM, Cerchietti L, Bardwell VJ, Melnick A, Prive GG. Structure of a BCOR corepressor peptide in complex with the BCL6 BTB domain dimer. Mol Cell. 2008 Feb 15;29(3):384-91. PMID:18280243 doi:10.1016/j.molcel.2007.12.026
↑ Ahmad KF, Melnick A, Lax S, Bouchard D, Liu J, Kiang CL, Mayer S, Takahashi S, Licht JD, Prive GG. Mechanism of SMRT corepressor recruitment by the BCL6 BTB domain. Mol Cell. 2003 Dec;12(6):1551-64. PMID:14690607

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1r2b"

@@ Line 3: / Line 3: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1r2b]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1R2B OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1R2B FirstGlance]. <br>
-</td></tr><tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1r28|1r28]], [[1r29|1r29]]</td></tr>
+</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1r28|1r28]], [[1r29|1r29]]</td></tr>
-<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">BCL6 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]), NCOR2 OR CTG26 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">BCL6 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]), NCOR2 OR CTG26 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</td></tr>
-<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=1r2b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1r2b OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1r2b RCSB], [http://www.ebi.ac.uk/pdbsum/1r2b 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=1r2b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1r2b OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1r2b RCSB], [http://www.ebi.ac.uk/pdbsum/1r2b PDBsum]</span></td></tr>
-<table>
+</table>
 == Disease ==
 [[http://www.uniprot.org/uniprot/BCL6_HUMAN BCL6_HUMAN]] Note=Chromosomal aberrations involving BCL6 may be a cause of B-cell non-Hodgkin lymphoma. Translocation t(3;14)(q27;q32); translocation t(3;22)(q27;q11) with immunoglobulin gene regions.  Note=A chromosomal aberration involving BCL6 may be a cause of a form of B-cell leukemia. Translocation t(3;11)(q27;q23) with POU2AF1/OBF1.  Note=A chromosomal aberration involving BCL6 may be a cause of lymphoma. Translocation t(3;4)(q27;p11) with ARHH/TTF.
@@ Line 34: / Line 34: @@
 </StructureSection>
 [[Category: Homo sapiens]]
-[[Category: Ahmad, K F.]]
+[[Category: Ahmad, K F]]
-[[Category: Bouchard, D.]]
+[[Category: Bouchard, D]]
-[[Category: Kiang, C L.]]
+[[Category: Kiang, C L]]
-[[Category: Lax, S A.]]
+[[Category: Lax, S A]]
-[[Category: Licht, J D.]]
+[[Category: Licht, J D]]
-[[Category: Liu, J.]]
+[[Category: Liu, J]]
-[[Category: Mayer, S.]]
+[[Category: Mayer, S]]
-[[Category: Melnick, A.]]
+[[Category: Melnick, A]]
-[[Category: Prive, G G.]]
+[[Category: Prive, G G]]
 [[Category: B-cell lymphoma]]
 [[Category: Btb domain]]

1r2b

From Proteopedia

Revision as of 07:15, 6 January 2015

Crystal structure of the BCL6 BTB domain complexed with a SMRT co-repressor peptide

Structural highlights

Disease

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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