View source for 4r94


==Structure of the nickase domain of NS1 from MVM complexed with magnesium==
<StructureSection load='4r94' size='340' side='right'caption='[[4r94]], [[Resolution|resolution]] 1.67&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4r94]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Murine_minute_virus_strain_MVM_prototype Murine minute virus strain MVM prototype]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4R94 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4R94 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]] 1.668&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></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=4r94 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4r94 OCA], [https://pdbe.org/4r94 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4r94 RCSB], [https://www.ebi.ac.uk/pdbsum/4r94 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4r94 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/NS1_MUMIP NS1_MUMIP] Multifunctional protein that plays an essential role in viral DNA replication. Inhibits the host cell cycle during the G1/S transition, the S-phase, and the G2/M transition. These arrests may provide essential cellular factors for viral DNA replication. Interacts specifically with the viral DNA origin of replication and plays a direct role in DNA replication. Participates in the transcriptional regulation of several promoters including the viral p38 promoter that regulates the expression of VP1 and VP2 transcripts. Promotes apoptosis in host cell.<ref>PMID:11602746</ref> <ref>PMID:21295324</ref> <ref>PMID:7636987</ref> <ref>PMID:9188601</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Members of the Parvoviridae family all encode a non-structural protein 1 (NS1) that directs replication of single-stranded viral DNA, packages viral DNA into capsid, and serves as a potent transcriptional activator. Here we report the X-ray structure of the minute virus of mice (MVM) NS1 N-terminal domain at 1.45A resolution, showing that sites for dsDNA binding, ssDNA binding and cleavage, nuclear localization, and other functions are integrated on a canonical fold of the histidine-hydrophobic-histidine superfamily of nucleases, including elements specific for this Protoparvovirus but distinct from its Bocaparvovirus or Dependoparvovirus orthologs. High resolution structural analysis reveals a nickase active site with an architecture that allows highly versatile metal ligand binding. The structures support a unified mechanism of replication origin recognition for homotelomeric and heterotelomeric parvoviruses, mediated by a basic-residue-rich hairpin and an adjacent helix in the initiator proteins and by tandem tetranucleotide motifs in the replication origins.

Structures of minute virus of mice replication initiator protein N-terminal domain: Insights into DNA nicking and origin binding.,Tewary SK, Liang L, Lin Z, Lynn A, Cotmore SF, Tattersall P, Zhao H, Tang L Virology. 2014 Dec 17;476C:61-71. doi: 10.1016/j.virol.2014.11.022. PMID:25528417<ref>PMID:25528417</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4r94" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Murine minute virus strain MVM prototype]]
[[Category: Liang L]]
[[Category: Tang L]]
[[Category: Zhao H]]