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| | ==The crystal structure of 14-3-3-sigma at 2.8 angstrom resolution== | | ==The crystal structure of 14-3-3-sigma at 2.8 angstrom resolution== |
| - | <StructureSection load='1yz5' size='340' side='right' caption='[[1yz5]], [[Resolution|resolution]] 2.80Å' scene=''> | + | <StructureSection load='1yz5' size='340' side='right'caption='[[1yz5]], [[Resolution|resolution]] 2.80Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1yz5]] is a 2 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=1YZ5 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1YZ5 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1yz5]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1YZ5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1YZ5 FirstGlance]. <br> |
| - | </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=1yz5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1yz5 OCA], [http://pdbe.org/1yz5 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1yz5 RCSB], [http://www.ebi.ac.uk/pdbsum/1yz5 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1yz5 ProSAT]</span></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8Å</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=1yz5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1yz5 OCA], [https://pdbe.org/1yz5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1yz5 RCSB], [https://www.ebi.ac.uk/pdbsum/1yz5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1yz5 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/1433S_HUMAN 1433S_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. When bound to KRT17, regulates protein synthesis and epithelial cell growth by stimulating Akt/mTOR pathway (By similarity). p53-regulated inhibitor of G2/M progression. | + | [https://www.uniprot.org/uniprot/1433S_HUMAN 1433S_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. When bound to KRT17, regulates protein synthesis and epithelial cell growth by stimulating Akt/mTOR pathway (By similarity). p53-regulated inhibitor of G2/M progression. |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
| | Check<jmol> | | Check<jmol> |
| | <jmolCheckbox> | | <jmolCheckbox> |
| - | <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/yz/1yz5_consurf.spt"</scriptWhenChecked> | + | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/yz/1yz5_consurf.spt"</scriptWhenChecked> |
| | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> |
| | <text>to colour the structure by Evolutionary Conservation</text> | | <text>to colour the structure by Evolutionary Conservation</text> |
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| | ==See Also== | | ==See Also== |
| - | *[[14-3-3 protein|14-3-3 protein]] | + | *[[14-3-3 protein 3D structures|14-3-3 protein 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| - | [[Category: Benzinger, A]] | + | [[Category: Large Structures]] |
| - | [[Category: Hermeking, H]] | + | [[Category: Benzinger A]] |
| - | [[Category: Holak, T A]]
| + | [[Category: Hermeking H]] |
| - | [[Category: Popowicz, G M]] | + | [[Category: Holak TA]] |
| - | [[Category: Helix bundle]] | + | [[Category: Popowicz GM]] |
| - | [[Category: Homodimer]] | + | |
| - | [[Category: Signaling protein]]
| + | |
| Structural highlights
Function
1433S_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. When bound to KRT17, regulates protein synthesis and epithelial cell growth by stimulating Akt/mTOR pathway (By similarity). p53-regulated inhibitor of G2/M progression.
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
Seven different, but highly conserved 14-3-3 proteins are involved in diverse signaling pathways in human cells. It is unclear how the 14-3-3sigma isoform, a transcriptional target of p53, exerts its inhibitory effect on the cell cycle in the presence of other 14-3-3 isoforms, which are constitutively expressed at high levels. In order to identify structural differences between the 14-3-3 isoforms, we solved the crystal structure of the human 14-3-3sigma protein at a resolution of 2.8 Angstroms and compared it to the known structures of 14-3-3zeta and 14-3-3tau. The global architecture of the 14-3-3sigma fold is similar to the previously determined structures of 14-3-3zeta and 14-3-3t: two 14-3-3sigma molecules form a cup-shaped dimer. Significant differences between these 14-3-3 isoforms were detected adjacent to the amphipathic groove, which mediates the binding to phosphorylated consensus motifs in 14-3-3-ligands. Another specificity determining region is localized between amino-acids 203 to 215. These differences presumably select for the interaction with specific ligands, which may explain the different biological functions of the respective 14-3-3 isoforms. Furthermore, the two 14-3-3sigma molecules forming a dimer differ by the spatial position of the ninth helix, which is shifted to the inside of the ligand interaction surface, thus indicating adaptability of this part of the molecule. In addition, 5 non-conserved residues are located at the interface between two 14-3-3sigma proteins forming a dimer and represent candidate determinants of homo- and hetero-dimerization specificity. The structural differences among the 14-3-3 isoforms described here presumably contribute to isoform-specific interactions and functions.
The crystal structure of the non-liganded 14-3-3sigma protein: insights into determinants of isoform specific ligand binding and dimerization.,Benzinger A, Popowicz GM, Joy JK, Majumdar S, Holak TA, Hermeking H Cell Res. 2005 Apr;15(4):219-27. PMID:15857576[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Benzinger A, Popowicz GM, Joy JK, Majumdar S, Holak TA, Hermeking H. The crystal structure of the non-liganded 14-3-3sigma protein: insights into determinants of isoform specific ligand binding and dimerization. Cell Res. 2005 Apr;15(4):219-27. PMID:15857576 doi:10.1038/sj.cr.7290290
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