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6gkf

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Structure of 14-3-3 gamma in complex with caspase-2 14-3-3 binding motif Ser139

Structural highlights

6gkf is a 16 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
NonStd Res:
Gene:	YWHAG (HUMAN)
Activity:	Caspase-2, with EC number 3.4.22.55
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[1433G_HUMAN] Adapter protein implicated in the regulation of a large spectrum of both general and specialized signaling pathways. Binds to a large number of partners, usually by recognition of a phosphoserine or phosphothreonine motif. Binding generally results in the modulation of the activity of the binding partner.^[1]

Publication Abstract from PubMed

Caspase-2 is an apical protease responsible for the proteolysis of cellular substrates directly involved in mediating apoptotic signaling cascades. Caspase-2 activation is inhibited by phosphorylation followed by binding to the scaffolding protein 14-3-3, which recognizes two phosphoserines located in the linker between the caspase recruitment domain and the p19 domains of the caspase-2 zymogen. However, the structural details of this interaction and the exact role of 14-3-3 in the regulation of caspase-2 activation remain unclear. Moreover, the caspase-2 region with both 14-3-3-binding motifs also contains the nuclear localization sequence (NLS), thus suggesting that 14-3-3 binding may regulate the subcellular localization of caspase-2. Here, we report a structural analysis of the 14-3-3zeta:caspase-2 complex using a combined approach based on small angle X-ray scattering, NMR, chemical cross-linking, and fluorescence spectroscopy. The structural model proposed in this study suggests that phosphorylated caspase-2 and 14-3-3zeta form a compact and rigid complex in which the p19 and the p12 domains of caspase-2 are positioned within the central channel of the 14-3-3 dimer and stabilized through interactions with the C-terminal helices of both 14-3-3zeta protomers. In this conformation, the surface of the p12 domain, which is involved in caspase-2 activation by dimerization, is sterically occluded by the 14-3-3 dimer, thereby likely preventing caspase-2 activation. In addition, 14-3-3 protein binding to caspase-2 masks its NLS. Therefore, our results suggest that 14-3-3 protein binding to caspase-2 may play a key role in regulating caspase-2 activation. DATABASE: The atomic coordinates and structure factors have been deposited in the Protein Data Bank, www.ww pdb.org (PDB ID codes 6GKF and 6GKG).

14-3-3 protein masks the nuclear localization sequence of caspase-2.,Smidova A, Alblova M, Kalabova D, Psenakova K, Rosulek M, Herman P, Obsil T, Obsilova V FEBS J. 2018 Oct 3. doi: 10.1111/febs.14670. PMID:30281929^[2]

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

References

↑ Jin Y, Dai MS, Lu SZ, Xu Y, Luo Z, Zhao Y, Lu H. 14-3-3gamma binds to MDMX that is phosphorylated by UV-activated Chk1, resulting in p53 activation. EMBO J. 2006 Mar 22;25(6):1207-18. Epub 2006 Mar 2. PMID:16511572 doi:10.1038/sj.emboj.7601010
↑ Smidova A, Alblova M, Kalabova D, Psenakova K, Rosulek M, Herman P, Obsil T, Obsilova V. 14-3-3 protein masks the nuclear localization sequence of caspase-2. FEBS J. 2018 Oct 3. doi: 10.1111/febs.14670. PMID:30281929 doi:http://dx.doi.org/10.1111/febs.14670

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6gkf"

@@ Line 3: / Line 3: @@
 <StructureSection load='6gkf' size='340' side='right' caption='[[6gkf]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6gkf]] is a 16 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6GKF OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6GKF FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6gkf]] is a 16 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6GKF OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6GKF FirstGlance]. <br>
 </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=SEP:PHOSPHOSERINE'>SEP</scene></td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">YWHAG ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Caspase-2 Caspase-2], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.22.55 3.4.22.55] </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=6gkf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6gkf OCA], [http://pdbe.org/6gkf PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6gkf RCSB], [http://www.ebi.ac.uk/pdbsum/6gkf PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6gkf ProSAT]</span></td></tr>
@@ Line 24: / Line 25: @@
 </StructureSection>
 [[Category: Caspase-2]]
+[[Category: Human]]
 [[Category: Alblova, M]]
 [[Category: Obsil, T]]

6gkf

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Current revision

Structure of 14-3-3 gamma in complex with caspase-2 14-3-3 binding motif Ser139

Structural highlights

Function

Publication Abstract from PubMed

References

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