6hph: Difference between revisions

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==Crystal structure of human Pif1 helicase in complex with AMP-PNP==
==Crystal structure of human Pif1 helicase in complex with AMP-PNP==
<StructureSection load='6hph' size='340' side='right' caption='[[6hph]], [[Resolution|resolution]] 1.13&Aring;' scene=''>
<StructureSection load='6hph' size='340' side='right'caption='[[6hph]], [[Resolution|resolution]] 1.13&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[6hph]] is a 1 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=6HPH OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6HPH FirstGlance]. <br>
<table><tr><td colspan='2'>[[6hph]] is a 1 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=6HPH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6HPH FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ANP:PHOSPHOAMINOPHOSPHONIC+ACID-ADENYLATE+ESTER'>ANP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></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]] 1.13&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[6hpq|6hpq]], [[6hpt|6hpt]], [[6hpv|6hpv]]</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ANP:PHOSPHOAMINOPHOSPHONIC+ACID-ADENYLATE+ESTER'>ANP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PIF1, C15orf20 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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=6hph FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6hph OCA], [https://pdbe.org/6hph PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6hph RCSB], [https://www.ebi.ac.uk/pdbsum/6hph PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6hph ProSAT]</span></td></tr>
<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>
<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=6hph FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6hph OCA], [http://pdbe.org/6hph PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6hph RCSB], [http://www.ebi.ac.uk/pdbsum/6hph PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6hph ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/PIF1_HUMAN PIF1_HUMAN]] DNA-dependent ATPase and 5'-3' DNA helicase required for the maintenance of both mitochondrial and nuclear genome stability. Efficiently unwinds G-quadruplex (G4) DNA structures and forked RNA-DNA hybrids. Resolves G4 structures, preventing replication pausing and double-strand breaks (DSBs) at G4 motifs. Involved in the maintenance of telomeric DNA. Inhibits telomere elongation, de novo telomere formation and telomere addition to DSBs via catalytic inhibition of telomerase. Reduces the processivity of telomerase by displacing active telomerase from DNA ends. Releases telomerase by unwinding the short telomerase RNA/telomeric DNA hybrid that is the intermediate in the telomerase reaction. Possesses an intrinsic strand annealing activity.[HAMAP-Rule:MF_03176]<ref>PMID:16522649</ref> <ref>PMID:17172855</ref> <ref>PMID:17827721</ref> <ref>PMID:18835853</ref> <ref>PMID:19700773</ref> <ref>PMID:20524933</ref> <ref>PMID:23657261</ref>
[https://www.uniprot.org/uniprot/PIF1_HUMAN PIF1_HUMAN] DNA-dependent ATPase and 5'-3' DNA helicase required for the maintenance of both mitochondrial and nuclear genome stability. Efficiently unwinds G-quadruplex (G4) DNA structures and forked RNA-DNA hybrids. Resolves G4 structures, preventing replication pausing and double-strand breaks (DSBs) at G4 motifs. Involved in the maintenance of telomeric DNA. Inhibits telomere elongation, de novo telomere formation and telomere addition to DSBs via catalytic inhibition of telomerase. Reduces the processivity of telomerase by displacing active telomerase from DNA ends. Releases telomerase by unwinding the short telomerase RNA/telomeric DNA hybrid that is the intermediate in the telomerase reaction. Possesses an intrinsic strand annealing activity.[HAMAP-Rule:MF_03176]<ref>PMID:16522649</ref> <ref>PMID:17172855</ref> <ref>PMID:17827721</ref> <ref>PMID:18835853</ref> <ref>PMID:19700773</ref> <ref>PMID:20524933</ref> <ref>PMID:23657261</ref>  
<div style="background-color:#fffaf0;">
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
== Publication Abstract from PubMed ==
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</div>
</div>
<div class="pdbe-citations 6hph" style="background-color:#fffaf0;"></div>
<div class="pdbe-citations 6hph" style="background-color:#fffaf0;"></div>
==See Also==
*[[Helicase 3D structures|Helicase 3D structures]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: DNA helicase]]
[[Category: Homo sapiens]]
[[Category: Human]]
[[Category: Large Structures]]
[[Category: Antson, A A]]
[[Category: Antson AA]]
[[Category: Bax, B D]]
[[Category: Bax BD]]
[[Category: Dehghani-Tafti, S]]
[[Category: Dehghani-Tafti S]]
[[Category: Levdikov, V M]]
[[Category: Levdikov VM]]
[[Category: Sanders, C M]]
[[Category: Sanders CM]]
[[Category: 5'-3' dna helicase]]
[[Category: Dna repair]]
[[Category: Duplex unwinding]]
[[Category: Hydrolase]]
[[Category: Pif1]]
[[Category: Telomere maintenance]]

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