Protein: DNA polymerase nu (EC 2.7.7.7) (Q7Z5Q5)
Organism: Homo sapiens (Human)
Function: DNA polymerase with very low fidelity that catalyzes considerable misincorporation by inserting dTTP opposite a G template, and dGTP opposite a T template. Is the least accurate of the DNA polymerase A family (i.e. POLG, POLN and POLQ). Can perform accurate translesion DNA synthesis (TLS) past a 5S-thymine glycol. Can perform efficient strand displacement past a nick or a gap and gives rise to an amount of product similar to that on non-damaged template. Has no exonuclease activity. Error-prone DNA polymerase that preferentially misincorporates dT regardless of template sequence. May play a role in TLS during interstrand cross-link (ICL) repair. May be involved in TLS when genomic replication is blocked by extremely large major groove DNA lesions. May function in the bypass of some DNA-protein and DNA-DNA cross-links. May have a role in cellular tolerance to DNA cross-linking agents. Involved in the repair of DNA cross-links and double-strand break (DSB) resistance. Participates in FANCD2-mediated repair. Forms a complex with HELQ helicase that participates in homologous recombination (HR) repair and is essential for cellular protection against DNA cross-links.
Subcellular location: Nucleus {ECO:0000269|PubMed:12794064}.
Sequence: MENYEALVGFDLCNTPLSSVAQKIMSAMHSGDLVDSKTWGKSTETMEVINKSSVKYSVQLEDRKTQSPEKKDLKSLRSQTSRGSAKLSPQSFSVRLTDQLSADQKQKSISSLTLSSCLIPQYNQEASVLQKKGHKRKHFLMENINNENKGSINLKRKHITYNNLSEKTSKQMALEEDTDDAEGYLNSGNSGALKKHFCDIRHLDDWAKSQLIEMLKQAAALVITVMYTDGSTQLGADQTPVSSVRGIVVLVKRQAEGGHGCPDAPACGPVLEGFVSDDPCIYIQIEHSAIWDQEQEAHQQFARNVLFQTMKCKCPVICFNAKDFVRIVLQFFGNDGSWKHVADFIGLDPRIAAWLIDPSDATPSFEDLVEKYCEKSITVKVNSTYGNSSRNIVNQNVRENLKTLYRLTMDLCSKLKDYGLWQLFRTLELPLIPILAVMESHAIQVNKEEMEKTSALLGARLKELEQEAHFVAGERFLITSNNQLREILFGKLKLHLLSQRNSLPRTGLQKYPSTSEAVLNALRDLHPLPKIILEYRQVHKIKSTFVDGLLACMKKGSISSTWNQTGTVTGRLSAKHPNIQGISKHPIQITTPKNFKGKEDKILTISPRAMFVSSKGHTFLAADFSQIELRILTHLSGDPELLKLFQESERDDVFSTLTSQWKDVPVEQVTHADREQTKKVVYAVVYGAGKERLAACLGVPIQEAAQFLESFLQKYKKIKDFARAAIAQCHQTGCVVSIMGRRRPLPRIHAHDQQLRAQAERQAVNFVVQGSAADLCKLAMIHVFTAVAASHTLTARLVAQIHDELLFEVEDPQIPECAALVRRTMESLEQVQALELQLQVPLKVSLSAGRSWGHLVPLQEAWGPPPGPCRTESPSNSLAAPGSPASTQPPPLHFSPSFCL
InterPro domains: - IPR043502: DNA/RNA polymerase superfamily (homologous_superfamily) [419-855]
- IPR001098: DNA-directed DNA polymerase, family A, palm domain (domain) [448-853]
- IPR036397: Ribonuclease H superfamily (homologous_superfamily) [270-439]
- IPR040940: DNA polymerase nu, pseudo-exo domain (domain) [198-416]
- IPR002298: DNA polymerase A (family) [190-856]
Interaction partners: - Helicase POLQ-like
- DNA polymerase alpha catalytic subunit
- Fanconi anemia group D2 protein
- Proliferating cell nuclear antigen
- DNA-directed DNA/RNA polymerase mu
- Fanconi anemia group I protein
- Fanconi anemia group M protein
- Fanconi anemia group A protein
- E3 ubiquitin-protein ligase RAD18
- Fanconi-associated nuclease 1
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0003824 (catalytic activity), GO:0140640 (catalytic activity, acting on a nucleic acid), GO:0016740 (transferase activity), GO:0005515 (protein binding), GO:0140097 (catalytic activity, acting on DNA), GO:0016772 (transferase activity, transferring phosphorus-containing groups), GO:0034061 (DNA polymerase activity), GO:0016779 (nucleotidyltransferase activity), GO:0003887 (DNA-directed DNA polymerase activity)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0050896 (response to stimulus), GO:0009987 (cellular process), GO:0009058 (biosynthetic process), GO:0044237 (cellular metabolic process), GO:0006807 (nitrogen compound metabolic process), GO:0051716 (cellular response to stimulus), GO:0006950 (response to stress), GO:0071704 (organic substance metabolic process), GO:0044238 (primary metabolic process), GO:1901360 (organic cyclic compound metabolic process), GO:1901576 (organic substance biosynthetic process), GO:0006139 (nucleobase-containing compound metabolic process), GO:0046483 (heterocycle metabolic process), GO:0033554 (cellular response to stress), GO:0044249 (cellular biosynthetic process), GO:0006725 (cellular aromatic compound metabolic process), GO:0034641 (cellular nitrogen compound metabolic process), GO:0044260 (cellular macromolecule metabolic process), GO:0043170 (macromolecule metabolic process), GO:0009059 (macromolecule biosynthetic process), GO:1901362 (organic cyclic compound biosynthetic process), GO:0090304 (nucleic acid metabolic process), GO:0006974 (cellular response to DNA damage stimulus), GO:0019438 (aromatic compound biosynthetic process), GO:0018130 (heterocycle biosynthetic process), GO:0006259 (DNA metabolic process), GO:0044271 (cellular nitrogen compound biosynthetic process), GO:0034654 (nucleobase-containing compound biosynthetic process), GO:0071897 (DNA biosynthetic process), GO:0045005 (DNA-templated DNA replication maintenance of fidelity), GO:0006260 (DNA replication), GO:0006281 (DNA repair), GO:0006261 (DNA-templated DNA replication), GO:0000731 (DNA synthesis involved in DNA repair), GO:0006289 (nucleotide-excision repair), GO:0031297 (replication fork processing), GO:0019985 (translesion synthesis), GO:0070987 (error-free translesion synthesis)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0031974 (membrane-enclosed lumen), GO:0005654 (nucleoplasm), GO:0043229 (intracellular organelle), GO:0043233 (organelle lumen), GO:0043227 (membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle), GO:0070013 (intracellular organelle lumen), GO:0031981 (nuclear lumen), GO:0005634 (nucleus)