ID A0A384DCH6_URSMA Unreviewed; 281 AA.
AC A0A384DCH6;
DT 07-NOV-2018, integrated into UniProtKB/TrEMBL.
DT 07-NOV-2018, sequence version 1.
DT 27-MAR-2024, entry version 24.
DE RecName: Full=DNA polymerase {ECO:0000256|RuleBase:RU366014};
DE EC=2.7.7.7 {ECO:0000256|RuleBase:RU366014};
GN Name=POLB {ECO:0000313|RefSeq:XP_008704514.1};
OS Ursus maritimus (Polar bear) (Thalarctos maritimus).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC Eutheria; Laurasiatheria; Carnivora; Caniformia; Ursidae; Ursus.
OX NCBI_TaxID=29073 {ECO:0000313|Proteomes:UP000261680, ECO:0000313|RefSeq:XP_008704514.1};
RN [1] {ECO:0000313|RefSeq:XP_008704514.1}
RP IDENTIFICATION.
RC TISSUE=Whole blood {ECO:0000313|RefSeq:XP_008704514.1};
RG RefSeq;
RL Submitted (NOV-2023) to UniProtKB.
CC -!- FUNCTION: DNA polymerase that functions in several pathways of DNA
CC repair. Involved in base excision repair (BER) responsible for repair
CC of lesions that give rise to abasic (AP) sites in DNA. Also contributes
CC to DNA double-strand break repair by non-homologous end joining and
CC homologous recombination. Has both template-dependent and template-
CC independent (terminal transferase) DNA polymerase activities. Has also
CC a 5'-deoxyribose-5-phosphate lyase (dRP lyase) activity.
CC {ECO:0000256|RuleBase:RU366014}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=2'-deoxyribonucleotide-(2'-deoxyribose 5'-phosphate)-2'-
CC deoxyribonucleotide-DNA = a 3'-end 2'-deoxyribonucleotide-(2,3-
CC dehydro-2,3-deoxyribose 5'-phosphate)-DNA + a 5'-end 5'-monophospho-
CC 2'-deoxyribonucleoside-DNA + H(+); Xref=Rhea:RHEA:66592, Rhea:RHEA-
CC COMP:13180, Rhea:RHEA-COMP:16897, Rhea:RHEA-COMP:17067,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:136412, ChEBI:CHEBI:157695,
CC ChEBI:CHEBI:167181; EC=4.2.99.18;
CC Evidence={ECO:0000256|ARBA:ARBA00024490};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 2'-deoxyribonucleoside 5'-triphosphate + DNA(n) =
CC diphosphate + DNA(n+1); Xref=Rhea:RHEA:22508, Rhea:RHEA-COMP:17339,
CC Rhea:RHEA-COMP:17340, ChEBI:CHEBI:33019, ChEBI:CHEBI:61560,
CC ChEBI:CHEBI:173112; EC=2.7.7.7;
CC Evidence={ECO:0000256|ARBA:ARBA00024632,
CC ECO:0000256|RuleBase:RU366014};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 5'-end 2'-deoxyribose-2'-deoxyribonucleotide-DNA = (2E,4S)-
CC 4-hydroxypenten-2-al-5-phosphate + a 5'-end 5'-monophospho-2'-
CC deoxyribonucleoside-DNA + H(+); Xref=Rhea:RHEA:76255, Rhea:RHEA-
CC COMP:13180, Rhea:RHEA-COMP:18657, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:136412, ChEBI:CHEBI:195194, ChEBI:CHEBI:195195;
CC Evidence={ECO:0000256|ARBA:ARBA00035582};
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|ARBA:ARBA00004496}.
CC Nucleus {ECO:0000256|ARBA:ARBA00004123, ECO:0000256|RuleBase:RU366014}.
CC -!- SIMILARITY: Belongs to the DNA polymerase type-X family.
CC {ECO:0000256|RuleBase:RU366014}.
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DR RefSeq; XP_008704514.1; XM_008706292.2.
DR AlphaFoldDB; A0A384DCH6; -.
DR GeneID; 103677058; -.
DR CTD; 5423; -.
DR OrthoDB; 49764at2759; -.
DR Proteomes; UP000261680; Unplaced.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0005634; C:nucleus; IEA:UniProtKB-SubCell.
DR GO; GO:0140078; F:class I DNA-(apurinic or apyrimidinic site) endonuclease activity; IEA:RHEA.
DR GO; GO:0003677; F:DNA binding; IEA:UniProtKB-UniRule.
DR GO; GO:0003887; F:DNA-directed DNA polymerase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0006281; P:DNA repair; IEA:UniProtKB-KW.
DR GO; GO:0006260; P:DNA replication; IEA:UniProtKB-KW.
DR CDD; cd00141; NT_POLXc; 1.
DR Gene3D; 1.10.150.20; 5' to 3' exonuclease, C-terminal subdomain; 1.
DR Gene3D; 3.30.460.10; Beta Polymerase, domain 2; 1.
DR Gene3D; 1.10.150.110; DNA polymerase beta, N-terminal domain-like; 1.
DR InterPro; IPR002054; DNA-dir_DNA_pol_X.
DR InterPro; IPR019843; DNA_pol-X_BS.
DR InterPro; IPR010996; DNA_pol_b-like_N.
DR InterPro; IPR028207; DNA_pol_B_palm_palm.
DR InterPro; IPR018944; DNA_pol_lambd_fingers_domain.
DR InterPro; IPR027421; DNA_pol_lamdba_lyase_dom_sf.
DR InterPro; IPR022312; DNA_pol_X.
DR InterPro; IPR002008; DNA_pol_X_beta-like.
DR InterPro; IPR003583; Hlx-hairpin-Hlx_DNA-bd_motif.
DR InterPro; IPR043519; NT_sf.
DR PANTHER; PTHR11276:SF42; DNA POLYMERASE BETA; 1.
DR PANTHER; PTHR11276; DNA POLYMERASE TYPE-X FAMILY MEMBER; 1.
DR Pfam; PF14792; DNA_pol_B_palm; 1.
DR Pfam; PF10391; DNA_pol_lambd_f; 1.
DR Pfam; PF14716; HHH_8; 1.
DR PRINTS; PR00869; DNAPOLX.
DR PRINTS; PR00870; DNAPOLXBETA.
DR SMART; SM00278; HhH1; 2.
DR SMART; SM00483; POLXc; 1.
DR SUPFAM; SSF47802; DNA polymerase beta, N-terminal domain-like; 1.
DR SUPFAM; SSF81301; Nucleotidyltransferase; 1.
DR SUPFAM; SSF81585; PsbU/PolX domain-like; 1.
DR PROSITE; PS00522; DNA_POLYMERASE_X; 1.
PE 3: Inferred from homology;
KW DNA damage {ECO:0000256|ARBA:ARBA00022763, ECO:0000256|RuleBase:RU366014};
KW DNA repair {ECO:0000256|ARBA:ARBA00023204, ECO:0000256|RuleBase:RU366014};
KW DNA replication {ECO:0000256|ARBA:ARBA00022705};
KW DNA synthesis {ECO:0000256|ARBA:ARBA00022634};
KW DNA-binding {ECO:0000256|ARBA:ARBA00023125};
KW DNA-directed DNA polymerase {ECO:0000256|ARBA:ARBA00022932,
KW ECO:0000256|RuleBase:RU366014}; Lyase {ECO:0000256|ARBA:ARBA00023239};
KW Methylation {ECO:0000256|ARBA:ARBA00022481};
KW Nucleotidyltransferase {ECO:0000256|RuleBase:RU366014};
KW Nucleus {ECO:0000256|ARBA:ARBA00023242, ECO:0000256|RuleBase:RU366014};
KW Reference proteome {ECO:0000313|Proteomes:UP000261680};
KW Sodium {ECO:0000256|ARBA:ARBA00023053};
KW Transferase {ECO:0000256|RuleBase:RU366014};
KW Ubl conjugation {ECO:0000256|ARBA:ARBA00022843}.
FT DOMAIN 10..280
FT /note="DNA-directed DNA polymerase X"
FT /evidence="ECO:0000259|SMART:SM00483"
FT DOMAIN 57..76
FT /note="Helix-hairpin-helix DNA-binding motif class 1"
FT /evidence="ECO:0000259|SMART:SM00278"
FT DOMAIN 98..117
FT /note="Helix-hairpin-helix DNA-binding motif class 1"
FT /evidence="ECO:0000259|SMART:SM00278"
FT REGION 253..281
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT ACT_SITE 72
FT /note="Nucleophile; Schiff-base intermediate with DNA; for
FT 5'-dRP lyase activity"
FT /evidence="ECO:0000256|PIRSR:PIRSR622312-50"
SQ SEQUENCE 281 AA; 31533 MW; 157A6F0A16159ECC CRC64;
MSKRKAPQET LNGGITDMLT ELANFEKNVN QAIHKYNAYR KAASVIAKYP HKIKSGAEAK
KLPGVGTKIA EKIDEFLATG KLRKLEKIRQ DDTSSSINFL TRVSGIGPSA ARKFVDEGIK
TLEDLRKNED KLNHHQRIGL KYFEDFEKRI PREEMLQMQD IVLNEVKKVD SEYIATVCGS
FRRGAESSGD MDVLLTHPSF TSESTKQPKL LHSVVEQLQK VHFITDTLSK GDTKFMESLE
SLCRWIVRKT SLTTSSGNTE NPRIGVNEAR SSQASSAQQE S
//
