Annotations: 8XAK

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B [auth C]	PF21530	DNA helicase Pif1, 2B domain (Pif1_2B_dom)	DNA helicase Pif1, 2B domain	Pif1 is a DNA helicase conserved from bacteria to humans. It suppresses both G-quadruplex-associated DNA damage and telomere lengthening. In budding yeast, it exists in two forms, nuclear and mitochondrial forms. Its nuclear form inhibits telomerase, ...	Pif1 is a DNA helicase conserved from bacteria to humans. It suppresses both G-quadruplex-associated DNA damage and telomere lengthening. In budding yeast, it exists in two forms, nuclear and mitochondrial forms. Its nuclear form inhibits telomerase, while its mitochondrial is involved in repair and recombination of mitochondrial DNA. These proteins belong to the helicase superfamily 1 (SF1) and contain RecA-like domains (1A and 2A) which, together with two additional domains, 1B and 2B, form the helicase core [1,2]. This entry represents domain 2B, which adopts a SH3-like fold.	Domain
A, B [auth C]	PF05970	PIF1-like helicase (PIF1)	PIF1-like helicase	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth D], D [auth B]	DNA (34-MER)	-	-	-
A, B [auth C]	ATP-dependent DNA helicase PIF1	nucleic acid conformation isomerase activity isomerase activity DNA helicase activity catalytic activity, acting on a nucleic acid helicase activity ATP-dependent activity ATP-dependent activity, acting on DNA catalytic activity, acting on DNA 5'-3' DNA helicase activity catalytic activity macromolecular conformation isomerase activity sequence-specific DNA binding DNA binding binding nucleic acid conformation isomerase activity isomerase activity DNA helicase activity catalytic activity, acting on a nucleic acid helicase activity ATP-dependent activity ATP-dependent activity, acting on DNA catalytic activity, acting on DNA 5'-3' DNA helicase activity catalytic activity macromolecular conformation isomerase activity sequence-specific DNA binding DNA binding binding nucleic acid binding telomeric DNA binding G-quadruplex DNA binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding sequence-specific double-stranded DNA binding double-stranded DNA binding centromeric DNA binding pyrophosphatase activity ATP hydrolysis activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides enzyme regulator activity molecular function inhibitor activity molecular function regulator activity enzyme inhibitor activity telomerase inhibitor activity single-stranded DNA binding	nucleobase-containing compound metabolic process DNA replication metabolic process cellular process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process cellular component organization organelle organization chromosome organization cellular component organization or biogenesis DNA recombination mitotic recombination nucleobase-containing compound metabolic process DNA replication metabolic process cellular process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process cellular component organization organelle organization chromosome organization cellular component organization or biogenesis DNA recombination mitotic recombination telomere organization telomere maintenance telomere maintenance via recombination DNA-templated DNA replication DNA-templated DNA replication maintenance of fidelity replication fork reversal replication fork processing translesion synthesis cellular response to stimulus response to stimulus nucleobase-containing compound biosynthetic process DNA damage tolerance macromolecule biosynthetic process DNA synthesis involved in DNA replication nucleic acid biosynthetic process biosynthetic process cellular response to stress DNA damage response response to stress DNA biosynthetic process double-strand break repair double-strand break repair via break-induced replication recombinational repair double-strand break repair via homologous recombination DNA repair negative regulation of telomere maintenance regulation of cellular process negative regulation of biological process negative regulation of telomere maintenance via telomerase regulation of DNA biosynthetic process regulation of primary metabolic process RNA-templated DNA biosynthetic process telomere maintenance via telomere lengthening negative regulation of chromosome organization negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of biological process negative regulation of cellular component organization negative regulation of metabolic process regulation of chromosome organization regulation of telomere maintenance via telomere lengthening regulation of organelle organization negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process regulation of metabolic process negative regulation of DNA biosynthetic process regulation of DNA metabolic process regulation of telomere maintenance regulation of cellular component organization negative regulation of telomere maintenance via telomere lengthening negative regulation of cellular process negative regulation of macromolecule metabolic process regulation of biosynthetic process telomere maintenance via telomerase biological regulation regulation of macromolecule metabolic process regulation of telomere maintenance via telomerase negative regulation of organelle organization negative regulation of biosynthetic process negative regulation of DNA metabolic process	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane nucleus membrane-enclosed lumen intracellular membraneless organelle nucleolus intracellular organelle lumen organelle lumen membraneless organelle nuclear lumen replication fork chromosome nuclear replication fork nuclear chromosome site of double-strand break site of DNA damage

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B [auth C]	IPR051055	PIF1 DNA helicase	Family
A, B [auth C]	IPR049163	DNA helicase Pif1-like, 2B domain	Domain
A, B [auth C]	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A, B [auth C]	IPR010285	DNA helicase Pif1-like, DEAD-box helicase domain	Domain
A, B [auth C]	IPR048293	DNA helicase PIF1/RRM3/pfh1	Family

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.