View source for 7lo0


==Structure of human ASF1a in complex with a TLK2 peptide==
<StructureSection load='7lo0' size='340' side='right'caption='[[7lo0]], [[Resolution|resolution]] 2.71&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7lo0]] is a 24 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=7LO0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7LO0 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.71&#8491;</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=7lo0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7lo0 OCA], [https://pdbe.org/7lo0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7lo0 RCSB], [https://www.ebi.ac.uk/pdbsum/7lo0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7lo0 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ASF1A_HUMAN ASF1A_HUMAN] Histone chaperone that facilitates histone deposition and histone exchange and removal during nucleosome assembly and disassembly. Cooperates with chromatin assembly factor 1 (CAF-1) to promote replication-dependent chromatin assembly and with HIRA to promote replication-independent chromatin assembly. Required for the formation of senescence-associated heterochromatin foci (SAHF) and efficient senescence-associated cell cycle exit.<ref>PMID:10759893</ref> <ref>PMID:11897662</ref> <ref>PMID:12842904</ref> <ref>PMID:14718166</ref> <ref>PMID:15621527</ref> <ref>PMID:16151251</ref> <ref>PMID:15664198</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Tousled-like kinases (TLKs) are nuclear serine-threonine kinases essential for genome maintenance and proper cell division in animals and plants. A major function of TLKs is to phosphorylate the histone chaperone proteins ASF1a and ASF1b to facilitate DNA replication-coupled nucleosome assembly, but how TLKs selectively target these critical substrates is unknown. Here, we show that TLK2 selectivity towards ASF1 substrates is achieved in two ways. First, the TLK2 catalytic domain recognizes consensus phosphorylation site motifs in the ASF1 C-terminal tail. Second, a short sequence at the TLK2 N-terminus docks onto the ASF1a globular N-terminal domain in a manner that mimics its histone H3 client. Disrupting either catalytic or non-catalytic interactions through mutagenesis hampers ASF1 phosphorylation by TLK2 and cell growth. Our results suggest that the stringent selectivity of TLKs for ASF1 is enforced by an unusual interaction mode involving mutual recognition of a short sequence motifs by both kinase and substrate.

Tousled-like kinase 2 targets ASF1 histone chaperones through client mimicry.,Simon B, Lou HJ, Huet-Calderwood C, Shi G, Boggon TJ, Turk BE, Calderwood DA Nat Commun. 2022 Feb 8;13(1):749. doi: 10.1038/s41467-022-28427-0. PMID:35136069<ref>PMID:35136069</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7lo0" style="background-color:#fffaf0;"></div>

==See Also==
*[[Anti-silencing factor 3D structures|Anti-silencing factor 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Boggon TJ]]
[[Category: Calderwood D]]
[[Category: Simon B]]
[[Category: Turk BE]]