Protein: ATP-dependent DNA helicase PIF1 (Q59RQ0)
Organism: Candida albicans (strain SC5314 / ATCC MYA-2876) (Yeast)
Function: 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. Involved in the maintenance of ribosomal (rDNA). Required for efficient fork arrest at the replication fork barrier within rDNA. Involved in the maintenance of mitochondrial (mtDNA). Required to maintain mtDNA under conditions that introduce dsDNA breaks in mtDNA, either preventing or repairing dsDNA breaks. May inhibit replication progression to allow time for repair. May have a general role in chromosomal replication by affecting Okazaki fragment maturation. May have a role in conjunction with DNA2 helicase/nuclease in 5'-flap extension during Okazaki fragment processing
Subcellular location: Nucleus. Mitochondrion
Sequence: MLNANKSIIRLATYSIRNRIHHLRTLHSLNYINSRINIQDTNHIRPTCPCGSKQFMLESELDSALIEFLDNDDPFSDSEIKESDDLSKGQSHVYNGSPVTKNSILQIEKQQIQKSPRPTETNKRMQIRKDPDQNDNVDDDSLSSTFEFSDMDDDFMEALKAAEEITGNNTNCIKRTASTPLKKPIAKSMKNSSTPSKSAGKKYCKYIKTSSPSPSHYLIRESGSGVDILEGSPNKVQADNASPFRITSSFSSPSQIQNQGVGANPGPKSKAEQNVSSASQSSSPPMTVSQVRNPFKVPTQFRRNYSTRPITNQGSDTKKGNSHHTILLATQKPGVPFSNPSDRSYHKLEKTEGINEAQSEAKNVKPIILSNEQEYVLKQVLSGVSLFYTGSAGTGKSVLLRSIIKSLRDKYPKGVAVTASTGLAACNIGGITLHSFAGFGLGQGKVENLIKKIKRNKKAFTRWRETRVLIIDEISMVDGHLLNKLNEIAKNLRRNNRPFGGIQLVACGDFYQLPPVVKKTAHDGTELDDVEVFFAFESSAWKETIQRTITLKEIFRQKGDQRFINMLNNLRDGNVPDDTARDFCRLSRPLKCPEGIVPSELYATRYEVDMANSRKLNTIQGDVVVYNSVDTGILPEPQKTQVLTNFLAPQVLNLKVGAQVMCIKNFDDQLVNGTLGKVIDFVDRDTYMKSESKENPSTETSDEVSGLNDYIFNDFQKPKKVVKEDAPIAEQVLFTGQLSQKVEEESESSKRKSKLKDDLMKDYKNKKYPLVKFLLPDGITFRTVVVEPEQWTTEDEDGTVLVSRIQFPLILAWSLSIHKSQGQTLSKVVVDMKKIFENGQAYVALSRAVSRAGLQVLNFNRSKVASHRKVIEFYKNLSSHEKESRSGQQRLNFMQTSVKSVARAQI
InterPro domains: - IPR051055: PIF1 DNA helicase (family) [363-890]
- IPR010285: DNA helicase Pif1-like, DEAD-box helicase domain (domain) [369-579]
- IPR027417: P-loop containing nucleoside triphosphate hydrolase (homologous_superfamily) [341-877]
- IPR003593: AAA+ ATPase domain (domain) [382-685]
- IPR048293: DNA helicase PIF1/RRM3/pfh1 (family) [121-881]
- IPR049163: DNA helicase Pif1-like, 2B domain (domain) [642-681]
Interaction partners: - DNA repair and recombination protein RAD52
- DNA replication ATP-dependent helicase/nuclease DNA2
- Proliferating cell nuclear antigen
- DNA 3'-5' helicase
- Origin recognition complex subunit 5
- Flap endonuclease 1
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0003824 (catalytic activity), GO:0140657 (ATP-dependent activity), GO:0140640 (catalytic activity, acting on a nucleic acid), GO:0004386 (helicase activity), GO:0008094 (ATP-dependent activity, acting on DNA), GO:0140097 (catalytic activity, acting on DNA), GO:0003678 (DNA helicase activity)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0071840 (cellular component organization or biogenesis), GO:0044237 (cellular metabolic process), GO:0071704 (organic substance metabolic process), GO:0044238 (primary metabolic process), GO:0006807 (nitrogen compound metabolic process), GO:0016043 (cellular component organization), GO:0006725 (cellular aromatic compound metabolic process), GO:1901360 (organic cyclic compound metabolic process), GO:0034641 (cellular nitrogen compound metabolic process), GO:0006139 (nucleobase-containing compound metabolic process), GO:0044260 (cellular macromolecule metabolic process), GO:0043170 (macromolecule metabolic process), GO:0046483 (heterocycle metabolic process), GO:0006259 (DNA metabolic process), GO:0006996 (organelle organization), GO:0090304 (nucleic acid metabolic process), GO:0007005 (mitochondrion organization), GO:0006260 (DNA replication), GO:0032042 (mitochondrial DNA metabolic process), GO:0006264 (mitochondrial DNA replication), GO:0006261 (DNA-templated DNA replication), GO:0000002 (mitochondrial genome maintenance)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0005737 (cytoplasm), GO:0031974 (membrane-enclosed lumen), GO:0005657 (replication fork), GO:0005739 (mitochondrion), GO:0043233 (organelle lumen), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0043596 (nuclear replication fork), GO:0043228 (non-membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle), GO:0070013 (intracellular organelle lumen), GO:0043232 (intracellular non-membrane-bounded organelle), GO:0031981 (nuclear lumen), GO:0005694 (chromosome), GO:0005634 (nucleus), GO:0000228 (nuclear chromosome)