1k1b

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(Difference between revisions)

Revision as of 15:39, 5 January 2015

Crystal structure of the ankyrin repeat domain of Bcl-3: a unique member of the IkappaB protein family

Structural highlights

1k1b is a 1 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:	1k1a
Resources:	FirstGlance, OCA, RCSB, PDBsum

Disease

[BCL3_HUMAN] Note=A chromosomal aberration involving BCL3 may be a cause of B-cell chronic lymphocytic leukemia (B-CLL). Translocation t(14;19)(q32;q13.1) with immunoglobulin gene regions.

Function

[BCL3_HUMAN] Contributes to the regulation of transcriptional activation of NF-kappa-B target genes. In the cytoplasm, inhibits the nuclear translocation of the NF-kappa-B p50 subunit. In the nucleus, acts as transcriptional activator that promotes transcription of NF-kappa-B target genes. Contributes to the regulation of cell proliferation (By similarity).^[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

IkappaB proteins associate with the transcription factor NF-kappaB via their ankyrin repeat domain. Bcl-3 is an unusual IkappaB protein because it is primarily nucleoplasmic and can lead to enhanced NF-kappaB-dependent transcription, unlike the prototypical IkappaB protein IkappaBalpha, which inhibits NF-kappaB activity by retaining it in the cytoplasm. Here we report the 1.9 A crystal structure of the ankyrin repeat domain of human Bcl-3 and compare it with that of IkappaBalpha bound to NF-kappaB. The two structures are highly similar over the central ankyrin repeats but differ in the N-terminal repeat and at the C-terminus, where Bcl-3 contains a seventh repeat in place of the acidic PEST region of IkappaBalpha. Differences between the two structures suggest why Bcl-3 differs from IkappaBalpha in selectivity towards various NF-kappaB species, why Bcl-3 but not IkappaBalpha can associate with its NF-kappaB partner bound to DNA, and why two molecules of Bcl-3 but only one of IkappaBalpha can bind to its NF-kappaB partner. Comparison of the two structures thus provides an insight into the functional diversity of IkappaB proteins.

Crystal structure of the ankyrin repeat domain of Bcl-3: a unique member of the IkappaB protein family.,Michel F, Soler-Lopez M, Petosa C, Cramer P, Siebenlist U, Muller CW EMBO J. 2001 Nov 15;20(22):6180-90. PMID:11707390^[2]

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

References

↑ Bours V, Franzoso G, Azarenko V, Park S, Kanno T, Brown K, Siebenlist U. The oncoprotein Bcl-3 directly transactivates through kappa B motifs via association with DNA-binding p50B homodimers. Cell. 1993 Mar 12;72(5):729-39. PMID:8453667
↑ Michel F, Soler-Lopez M, Petosa C, Cramer P, Siebenlist U, Muller CW. Crystal structure of the ankyrin repeat domain of Bcl-3: a unique member of the IkappaB protein family. EMBO J. 2001 Nov 15;20(22):6180-90. PMID:11707390 doi:10.1093/emboj/20.22.6180

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/1k1b"

@@ Line 3: / Line 3: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1k1b]] is a 1 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=1K1B OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1K1B FirstGlance]. <br>
-</td></tr><tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1k1a|1k1a]]</td></tr>
+</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1k1a|1k1a]]</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=1k1b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1k1b OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1k1b RCSB], [http://www.ebi.ac.uk/pdbsum/1k1b 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=1k1b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1k1b OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1k1b RCSB], [http://www.ebi.ac.uk/pdbsum/1k1b PDBsum]</span></td></tr>
-<table>
+</table>
 == Disease ==
 [[http://www.uniprot.org/uniprot/BCL3_HUMAN BCL3_HUMAN]] Note=A chromosomal aberration involving BCL3 may be a cause of B-cell chronic lymphocytic leukemia (B-CLL). Translocation t(14;19)(q32;q13.1) with immunoglobulin gene regions.
@@ Line 33: / Line 33: @@
 </StructureSection>
 [[Category: Homo sapiens]]
-[[Category: Cramer, P.]]
+[[Category: Cramer, P]]
-[[Category: Michel, F.]]
+[[Category: Michel, F]]
-[[Category: Mueller, C W.]]
+[[Category: Mueller, C W]]
-[[Category: Petosa, C.]]
+[[Category: Petosa, C]]
-[[Category: Siebenlist, U.]]
+[[Category: Siebenlist, U]]
-[[Category: Soler-Lopez, M.]]
+[[Category: Soler-Lopez, M]]
 [[Category: Bcl-3]]
 [[Category: Ikappab protein]]
 [[Category: Nf-kappab transcription factor]]
 [[Category: Transcription]]

1k1b

From Proteopedia

Revision as of 15:39, 5 January 2015

Crystal structure of the ankyrin repeat domain of Bcl-3: a unique member of the IkappaB protein family

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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