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2me8

From Proteopedia

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Current revision

Solution Structure of BCL-xL in its p53-bound conformation determined with selective isotope labelling of I,L,V sidechains

Structural highlights

2me8 is a 1 chain structure with sequence from Homo sapiens. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	Solution NMR
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

B2CL1_HUMAN Potent inhibitor of cell death. Inhibits activation of caspases (By similarity). Appears to regulate cell death by blocking the voltage-dependent anion channel (VDAC) by binding to it and preventing the release of the caspase activator, CYC1, from the mitochondrial membrane. Also acts as a regulator of G2 checkpoint and progression to cytokinesis during mitosis.^[1] ^[2] Isoform Bcl-X(S) promotes apoptosis.^[3] ^[4]

Publication Abstract from PubMed

Under conditions of genotoxic stress, human p53 activates the apoptotic effectors BAX or BAK to result in mitochondrial outer-membrane permeabilization and apoptosis. Antiapoptotic BCL-2 family member BCL-xL opposes this activity by sequestering cytosolic p53 via association with its DNA-binding domain, an interaction enhanced by p53 tetramerization. Here we characterized the BCL-xL-p53 complex by NMR spectroscopy and modulated it through mutagenesis to determine the relative contributions of BCL-xL's interactions with p53 or other BCL-2 family proteins to the BCL-xL-dependent inhibition of UV irradiation-induced apoptosis. Under our experimental conditions, one-third of the antiapoptotic activity of BCL-xL was mediated by p53 sequestration and the remaining two-thirds through sequestration of proapoptotic BCL-2 family members. Our studies define the contributions of cytosolic p53 to UV irradiation-induced apoptosis and provide opportunities to explore its contributions to other p53-dependent apoptotic signaling pathways.

The DNA-binding domain mediates both nuclear and cytosolic functions of p53.,Follis AV, Llambi F, Ou L, Baran K, Green DR, Kriwacki RW Nat Struct Mol Biol. 2014 Jun;21(6):535-43. doi: 10.1038/nsmb.2829. Epub 2014 May, 11. PMID:24814347^[5]

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

References

↑ Terrano DT, Upreti M, Chambers TC. Cyclin-dependent kinase 1-mediated Bcl-xL/Bcl-2 phosphorylation acts as a functional link coupling mitotic arrest and apoptosis. Mol Cell Biol. 2010 Feb;30(3):640-56. doi: 10.1128/MCB.00882-09. Epub 2009 Nov, 16. PMID:19917720 doi:10.1128/MCB.00882-09
↑ Wang J, Beauchemin M, Bertrand R. Bcl-xL phosphorylation at Ser49 by polo kinase 3 during cell cycle progression and checkpoints. Cell Signal. 2011 Dec;23(12):2030-8. doi: 10.1016/j.cellsig.2011.07.017. Epub, 2011 Aug 5. PMID:21840391 doi:10.1016/j.cellsig.2011.07.017
↑ Terrano DT, Upreti M, Chambers TC. Cyclin-dependent kinase 1-mediated Bcl-xL/Bcl-2 phosphorylation acts as a functional link coupling mitotic arrest and apoptosis. Mol Cell Biol. 2010 Feb;30(3):640-56. doi: 10.1128/MCB.00882-09. Epub 2009 Nov, 16. PMID:19917720 doi:10.1128/MCB.00882-09
↑ Wang J, Beauchemin M, Bertrand R. Bcl-xL phosphorylation at Ser49 by polo kinase 3 during cell cycle progression and checkpoints. Cell Signal. 2011 Dec;23(12):2030-8. doi: 10.1016/j.cellsig.2011.07.017. Epub, 2011 Aug 5. PMID:21840391 doi:10.1016/j.cellsig.2011.07.017
↑ Follis AV, Llambi F, Ou L, Baran K, Green DR, Kriwacki RW. The DNA-binding domain mediates both nuclear and cytosolic functions of p53. Nat Struct Mol Biol. 2014 Jun;21(6):535-43. doi: 10.1038/nsmb.2829. Epub 2014 May, 11. PMID:24814347 doi:http://dx.doi.org/10.1038/nsmb.2829

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2me8"

Categories: Homo sapiens | Large Structures | Grace CR | Kriwacki RW | Viacava Follis A

@@ Line 4: / Line 4: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[2me8]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ME8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2ME8 FirstGlance]. <br>
-</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2me8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2me8 OCA], [https://pdbe.org/2me8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2me8 RCSB], [https://www.ebi.ac.uk/pdbsum/2me8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2me8 ProSAT]</span></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2me8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2me8 OCA], [https://pdbe.org/2me8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2me8 RCSB], [https://www.ebi.ac.uk/pdbsum/2me8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2me8 ProSAT]</span></td></tr>
 </table>
 == Function ==

2me8

From Proteopedia

Current revision

Solution Structure of BCL-xL in its p53-bound conformation determined with selective isotope labelling of I,L,V sidechains

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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