8byl
From Proteopedia
(Difference between revisions)
| Line 8: | Line 8: | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8byl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8byl OCA], [https://pdbe.org/8byl PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8byl RCSB], [https://www.ebi.ac.uk/pdbsum/8byl PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8byl ProSAT]</span></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=8byl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8byl OCA], [https://pdbe.org/8byl PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8byl RCSB], [https://www.ebi.ac.uk/pdbsum/8byl PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8byl ProSAT]</span></td></tr> | ||
</table> | </table> | ||
| - | == Disease == | ||
| - | [https://www.uniprot.org/uniprot/CDN1B_HUMAN CDN1B_HUMAN] Defects in CDKN1B are the cause of multiple endocrine neoplasia type 4 (MEN4) [MIM:[https://omim.org/entry/610755 610755]. Multiple endocrine neoplasia (MEN) syndromes are inherited cancer syndromes of the thyroid. MEN4 is a MEN-like syndrome with a phenotypic overlap of both MEN1 and MEN2.<ref>PMID:17030811</ref> | ||
== Function == | == Function == | ||
| - | [https://www.uniprot.org/uniprot/ | + | [https://www.uniprot.org/uniprot/SKP1_HUMAN SKP1_HUMAN] Essential component of the SCF (SKP1-CUL1-F-box protein) ubiquitin ligase complex, which mediates the ubiquitination of proteins involved in cell cycle progression, signal transduction and transcription. In the SCF complex, serves as an adapter that links the F-box protein to CUL1. SCF(BTRC) mediates the ubiquitination of NFKBIA at 'Lys-21' and 'Lys-22'; the degradation frees the associated NFKB1-RELA dimer to translocate into the nucleus and to activate transcription. SCF(Cyclin F) directs ubiquitination of CP110.<ref>PMID:16209941</ref> <ref>PMID:20181953</ref> |
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | p27KIP1 (cyclin-dependent kinase inhibitor 1B, p27) is a member of the CIP/KIP family of CDK (cyclin dependent kinase) regulators that inhibit cell cycle CDKs. p27 phosphorylation by CDK1/2, signals its recruitment to the SCF(SKP2) (S-phase kinase associated protein 1 (SKP1)-cullin-SKP2) E3 ubiquitin ligase complex for proteasomal degradation. The nature of p27 binding to SKP2 and CKS1 was revealed by the SKP1-SKP2-CKS1-p27 phosphopeptide crystal structure. Subsequently, a model for the hexameric CDK2-cyclin A-CKS1-p27-SKP1-SKP2 complex was proposed by overlaying an independently determined CDK2-cyclin A-p27 structure. Here we describe the experimentally determined structure of the isolated CDK2-cyclin A-CKS1-p27-SKP1-SKP2 complex at 3.4 A global resolution using cryogenic electron microscopy. This structure supports previous analysis in which p27 was found to be structurally dynamic, transitioning from disordered to nascent secondary structure on target binding. We employed 3D variability analysis to further explore the conformational space of the hexameric complex and uncovered a previously unidentified hinge motion centred on CKS1. This flexibility gives rise to open and closed conformations of the hexameric complex that we propose may contribute to p27 regulation by facilitating recognition with SCF(SKP2). This 3D variability analysis further informed particle subtraction and local refinement approaches to enhance the local resolution of the complex. | ||
| + | |||
| + | Cryo-EM structure of SKP1-SKP2-CKS1 in complex with CDK2-cyclin A-p27KIP1.,Rowland RJ, Heath R, Maskell D, Thompson RF, Ranson NA, Blaza JN, Endicott JA, Noble MEM, Salamina M Sci Rep. 2023 Jul 3;13(1):10718. doi: 10.1038/s41598-023-37609-9. PMID:37400515<ref>PMID:37400515</ref> | ||
| + | |||
| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 8byl" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Current revision
Cryo-EM structure of SKP1-SKP2-CKS1 from the SCFSKP2 E3 ligase complex
| |||||||||||
