ID Q6T422_GINCI Unreviewed; 522 AA.
AC Q6T422;
DT 05-JUL-2004, integrated into UniProtKB/TrEMBL.
DT 05-JUL-2004, sequence version 1.
DT 24-JAN-2024, entry version 82.
DE RecName: Full=DNA nucleotidylexotransferase {ECO:0000256|ARBA:ARBA00015018, ECO:0000256|PIRNR:PIRNR000817};
DE EC=2.7.7.31 {ECO:0000256|ARBA:ARBA00012435, ECO:0000256|PIRNR:PIRNR000817};
GN Name=TdT {ECO:0000313|EMBL:AAG53984.2};
OS Ginglymostoma cirratum (Nurse shark) (Squalus cirratus).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Chondrichthyes;
OC Elasmobranchii; Galeomorphii; Galeoidea; Orectolobiformes;
OC Ginglymostomatidae; Ginglymostoma.
OX NCBI_TaxID=7801 {ECO:0000313|EMBL:AAG53984.2};
RN [1] {ECO:0000313|EMBL:AAG53984.2}
RP NUCLEOTIDE SEQUENCE.
RX PubMed=11172027; DOI=10.1073/pnas.98.4.1775;
RA Rumfelt L.L., Avila D., Diaz M., Bartl S., McKinney E.C., Flajnik M.F.;
RT "A shark antibody heavy chain encoded by a nonsomatically rearranged VDJ is
RT preferentially expressed in early development and is convergent with
RT mammalian IgG.";
RL Proc. Natl. Acad. Sci. U.S.A. 98:1775-1780(2001).
RN [2] {ECO:0000313|EMBL:AAG53984.2}
RP NUCLEOTIDE SEQUENCE.
RX PubMed=14579105; DOI=10.1007/s00251-003-0608-3;
RA Bartl S., Miracle A.L., Rumfelt L.L., Kepler T.B., Mochon E., Litman G.W.,
RA Flajnik M.F.;
RT "Terminal deoxynucleotidyl transferases from elasmobranchs reveal
RT structural conservation within vertebrates.";
RL Immunogenetics 55:594-604(2003).
CC -!- FUNCTION: Template-independent DNA polymerase which catalyzes the
CC random addition of deoxynucleoside 5'-triphosphate to the 3'-end of a
CC DNA initiator. One of the in vivo functions of this enzyme is the
CC addition of nucleotides at the junction (N region) of rearranged Ig
CC heavy chain and T-cell receptor gene segments during the maturation of
CC B- and T-cells. {ECO:0000256|ARBA:ARBA00037135}.
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=2.7.7.31;
CC Evidence={ECO:0000256|ARBA:ARBA00024522,
CC ECO:0000256|PIRNR:PIRNR000817};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|ARBA:ARBA00001946,
CC ECO:0000256|PIRNR:PIRNR000817, ECO:0000256|PIRSR:PIRSR000817-1};
CC -!- SUBCELLULAR LOCATION: Nucleus {ECO:0000256|ARBA:ARBA00004123,
CC ECO:0000256|PIRNR:PIRNR000817}.
CC -!- SIMILARITY: Belongs to the DNA polymerase type-X family.
CC {ECO:0000256|ARBA:ARBA00008323, ECO:0000256|PIRNR:PIRNR000817}.
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DR EMBL; AY437557; AAG53984.2; -; mRNA.
DR AlphaFoldDB; Q6T422; -.
DR SMR; Q6T422; -.
DR GO; GO:0005634; C:nucleus; IEA:UniProtKB-SubCell.
DR GO; GO:0003677; F:DNA binding; IEA:UniProtKB-UniRule.
DR GO; GO:0003912; F:DNA nucleotidylexotransferase activity; IEA:UniProtKB-KW.
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:0006304; P:DNA modification; IEA:UniProtKB-KW.
DR GO; GO:0006281; P:DNA repair; IEA:InterPro.
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; 3.40.50.10190; BRCT domain; 1.
DR Gene3D; 1.10.150.110; DNA polymerase beta, N-terminal domain-like; 1.
DR Gene3D; 3.30.210.10; DNA polymerase, thumb domain; 1.
DR InterPro; IPR001357; BRCT_dom.
DR InterPro; IPR036420; BRCT_dom_sf.
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; IPR037160; DNA_Pol_thumb_sf.
DR InterPro; IPR022312; DNA_pol_X.
DR InterPro; IPR043519; NT_sf.
DR InterPro; IPR029398; PolB_thumb.
DR InterPro; IPR027292; TdT.
DR InterPro; IPR001726; TdT/Mu.
DR PANTHER; PTHR11276:SF21; DNA NUCLEOTIDYLEXOTRANSFERASE; 1.
DR PANTHER; PTHR11276; DNA POLYMERASE TYPE-X FAMILY MEMBER; 1.
DR Pfam; PF00533; BRCT; 1.
DR Pfam; PF14792; DNA_pol_B_palm; 1.
DR Pfam; PF14791; DNA_pol_B_thumb; 1.
DR Pfam; PF10391; DNA_pol_lambd_f; 1.
DR Pfam; PF14716; HHH_8; 1.
DR PIRSF; PIRSF000817; DNA_NT; 1.
DR PIRSF; PIRSF501175; TDT; 1.
DR PRINTS; PR00869; DNAPOLX.
DR PRINTS; PR00871; DNAPOLXTDT.
DR SMART; SM00292; BRCT; 1.
DR SMART; SM00483; POLXc; 1.
DR SUPFAM; SSF52113; BRCT domain; 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; PS50172; BRCT; 1.
DR PROSITE; PS00522; DNA_POLYMERASE_X; 1.
PE 2: Evidence at transcript level;
KW Magnesium {ECO:0000256|PIRNR:PIRNR000817, ECO:0000256|PIRSR:PIRSR000817-1};
KW Metal-binding {ECO:0000256|PIRNR:PIRNR000817,
KW ECO:0000256|PIRSR:PIRSR000817-1};
KW Nucleotidyltransferase {ECO:0000256|ARBA:ARBA00022695,
KW ECO:0000256|PIRNR:PIRNR000817};
KW Nucleus {ECO:0000256|ARBA:ARBA00023242, ECO:0000256|PIRNR:PIRNR000817};
KW Terminal addition {ECO:0000256|ARBA:ARBA00022639};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|PIRNR:PIRNR000817}.
FT DOMAIN 30..127
FT /note="BRCT"
FT /evidence="ECO:0000259|PROSITE:PS50172"
FT BINDING 340
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|PIRSR:PIRSR000817-1"
FT BINDING 342
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|PIRSR:PIRSR000817-1"
FT BINDING 446
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|PIRSR:PIRSR000817-1"
SQ SEQUENCE 522 AA; 59874 MW; 9C9FE469CA66121D CRC64;
MSLAGSLGGM GIIPKRKRQK VTEVCSSQSK HQVRFQDLTI FIVERKMGSS RRSFLMDLAR
KKGFRVEDVM SDSVTHIVTE NNSWDEIWDW IQNLKLLNAD KLKMLNISWF TDSMAAGKPV
EIEERHKLQV QKMLQSNSPL PPPVVTISQY ACQRRSTLNN RNKIFTDALE ILAENFEFNE
NESAYVAFAR ATSLLKSLPY TISKMAALDG LPCFGDQTRA IIEEILEDGV SSKVDDLLCD
EKYKARKLFT SVFGVGLKTA DKWYGQGFRT LEAVKASKDL KFTKMQKAGF LYYEDINNAV
TRPEAEAVAQ IIETIVHNYA PDAIVTLTGG FRRGKETGHD VDFLISCPET MDENFLRKIV
NKLDFRGLLL YYDMVEATFE KRKLSSQKYD AMDHFQKCFL ILKLNKALVK NRVLSMSSVS
AARPTDEGAE PEVKTQIKDW KAIRVDLVIV PTQQFAYALL GWTGSRQFER DLRRYTNHEK
SMILDNHGLY DRKKKIFLNA KTEEEIFAHL DLEYIEPWER NA
//
