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5c3i

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'''Unreleased structure'''
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==Crystal structure of the quaternary complex of histone H3-H4 heterodimer with chaperone ASF1 and the replicative helicase subunit MCM2==
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<StructureSection load='5c3i' size='340' side='right' caption='[[5c3i]], [[Resolution|resolution]] 3.50&Aring;' scene=''>
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The entry 5c3i is ON HOLD until Paper Publication
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== Structural highlights ==
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<table><tr><td colspan='2'>[[5c3i]] is a 24 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5C3I OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5C3I FirstGlance]. <br>
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Authors: Wang, H., Wang, M., Yang, N., Xu, R.M.
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</td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=UNK:UNKNOWN'>UNK</scene></td></tr>
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<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA_helicase DNA helicase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.4.12 3.6.4.12] </span></td></tr>
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Description: Crystal structure of the quaternary complex of histone H3-H4 heterodimer with chaperone ASF1 and the replicative helicase subunit MCM2
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<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=5c3i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5c3i OCA], [http://www.rcsb.org/pdb/explore.do?structureId=5c3i RCSB], [http://www.ebi.ac.uk/pdbsum/5c3i PDBsum]</span></td></tr>
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[[Category: Unreleased Structures]]
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</table>
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== Function ==
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[[http://www.uniprot.org/uniprot/MCM2_HUMAN MCM2_HUMAN]] Acts as component of the MCM2-7 complex (MCM complex) which is the putative replicative helicase essential for 'once per cell cycle' DNA replication initiation and elongation in eukaryotic cells. The active ATPase sites in the MCM2-7 ring are formed through the interaction surfaces of two neighboring subunits such that a critical structure of a conserved arginine finger motif is provided in trans relative to the ATP-binding site of the Walker A box of the adjacent subunit. The six ATPase active sites, however, are likely to contribute differentially to the complex helicase activity. Required for the entry in S phase and for cell division.<ref>PMID:8175912</ref> [[http://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>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: DNA helicase]]
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[[Category: Wang, H]]
[[Category: Wang, M]]
[[Category: Wang, M]]
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[[Category: Xu, R.M]]
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[[Category: Xu, R M]]
[[Category: Yang, N]]
[[Category: Yang, N]]
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[[Category: Wang, H]]
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[[Category: Asf1]]
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[[Category: Chaperone]]
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[[Category: Histone]]
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[[Category: Mcm protein]]
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[[Category: Replication]]

Revision as of 14:44, 29 July 2015

Crystal structure of the quaternary complex of histone H3-H4 heterodimer with chaperone ASF1 and the replicative helicase subunit MCM2

5c3i, resolution 3.50Å

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