ID A0A093R1W6_PHACA Unreviewed; 330 AA.
AC A0A093R1W6;
DT 26-NOV-2014, integrated into UniProtKB/TrEMBL.
DT 26-NOV-2014, sequence version 1.
DT 24-JAN-2024, entry version 29.
DE RecName: Full=DNA topoisomerase I {ECO:0000256|RuleBase:RU365101};
DE EC=5.6.2.1 {ECO:0000256|RuleBase:RU365101};
DE AltName: Full=DNA topoisomerase 1 {ECO:0000256|RuleBase:RU365101};
DE Flags: Fragment;
GN ORFNames=N336_06773 {ECO:0000313|EMBL:KFW90142.1};
OS Phalacrocorax carbo (Great cormorant) (Pelecanus carbo).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda;
OC Coelurosauria; Aves; Neognathae; Suliformes; Phalacrocoracidae;
OC Phalacrocorax.
OX NCBI_TaxID=9209 {ECO:0000313|EMBL:KFW90142.1, ECO:0000313|Proteomes:UP000053238};
RN [1] {ECO:0000313|EMBL:KFW90142.1, ECO:0000313|Proteomes:UP000053238}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=BGI_N336 {ECO:0000313|EMBL:KFW90142.1};
RA Zhang G., Li C.;
RT "Genome evolution of avian class.";
RL Submitted (APR-2014) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Releases the supercoiling and torsional tension of DNA
CC introduced during the DNA replication and transcription by transiently
CC cleaving and rejoining one strand of the DNA duplex. Introduces a
CC single-strand break via transesterification at the specific target site
CC 5'-[CT]CCTTp site in duplex DNA. The scissile phosphodiester is
CC attacked by the catalytic tyrosine of the enzyme, resulting in the
CC formation of a DNA-(3'-phosphotyrosyl)-enzyme intermediate and the
CC expulsion of a 5'-OH DNA strand. The free DNA strand then undergoes
CC passage around the unbroken strand thus removing DNA supercoils.
CC Finally, in the religation step, the DNA 5'-OH attacks the covalent
CC intermediate to expel the active-site tyrosine and restore the DNA
CC phosphodiester backbone. {ECO:0000256|RuleBase:RU365101}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=ATP-independent breakage of single-stranded DNA, followed by
CC passage and rejoining.; EC=5.6.2.1;
CC Evidence={ECO:0000256|ARBA:ARBA00000213,
CC ECO:0000256|RuleBase:RU365101};
CC -!- SIMILARITY: Belongs to the type IB topoisomerase family.
CC {ECO:0000256|ARBA:ARBA00006645, ECO:0000256|RuleBase:RU365101}.
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DR EMBL; KL425375; KFW90142.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A093R1W6; -.
DR Proteomes; UP000053238; Unassembled WGS sequence.
DR GO; GO:0005694; C:chromosome; IEA:InterPro.
DR GO; GO:0003677; F:DNA binding; IEA:UniProtKB-UniRule.
DR GO; GO:0003917; F:DNA topoisomerase type I (single strand cut, ATP-independent) activity; IEA:UniProtKB-UniRule.
DR GO; GO:0006265; P:DNA topological change; IEA:UniProtKB-UniRule.
DR CDD; cd00659; Topo_IB_C; 1.
DR Gene3D; 1.10.132.10; -; 1.
DR InterPro; IPR011010; DNA_brk_join_enz.
DR InterPro; IPR001631; TopoI.
DR InterPro; IPR018521; TopoI_AS.
DR InterPro; IPR025834; TopoI_C_dom.
DR InterPro; IPR014711; TopoI_cat_a-hlx-sub_euk.
DR InterPro; IPR014727; TopoI_cat_a/b-sub_euk.
DR InterPro; IPR013500; TopoI_cat_euk.
DR InterPro; IPR013499; TopoI_euk.
DR PANTHER; PTHR10290; DNA TOPOISOMERASE I; 1.
DR PANTHER; PTHR10290:SF1; DNA TOPOISOMERASE I, MITOCHONDRIAL; 1.
DR Pfam; PF14370; Topo_C_assoc; 1.
DR Pfam; PF01028; Topoisom_I; 1.
DR PRINTS; PR00416; EUTPISMRASEI.
DR SMART; SM00435; TOPEUc; 1.
DR SUPFAM; SSF56349; DNA breaking-rejoining enzymes; 1.
DR SUPFAM; SSF46596; Eukaryotic DNA topoisomerase I, dispensable insert domain; 1.
DR PROSITE; PS00176; TOPOISOMERASE_I_EUK; 1.
PE 3: Inferred from homology;
KW DNA-binding {ECO:0000256|ARBA:ARBA00023125, ECO:0000256|RuleBase:RU365101};
KW Isomerase {ECO:0000256|ARBA:ARBA00023235, ECO:0000256|RuleBase:RU365101};
KW Reference proteome {ECO:0000313|Proteomes:UP000053238};
KW Topoisomerase {ECO:0000256|ARBA:ARBA00023029,
KW ECO:0000256|RuleBase:RU365101}.
FT DOMAIN 1..302
FT /note="DNA topoisomerase I eukaryotic-type"
FT /evidence="ECO:0000259|SMART:SM00435"
FT REGION 223..244
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT NON_TER 1
FT /evidence="ECO:0000313|EMBL:KFW90142.1"
FT NON_TER 330
FT /evidence="ECO:0000313|EMBL:KFW90142.1"
SQ SEQUENCE 330 AA; 38394 MW; 7F2B772631151A4A CRC64;
QGEKDWQKYE VARRLKDVVH KIRAQYRTDW KSKEMKKRQR AVALYFIDKL ALRAGNEKEE
GETADTVGCC SLRVEHITLH PKLDGQDHVV EFDFLGKDSI RYYNKVSVEK PVFKNLQLFM
KNKDPADDLF DRLNTSILNR HLQSLMDGLT AKVFRTYNAS ITLQEQLKAL TNSEDNVAGK
LLSYNRANRA VAILCNHQRS TPKTFEKSMQ NLQTKIDAKK QQVEEAQQEL KKAEDEFEDT
QDDKAKANVE KKKKLLKRLE EQLAKLNVQA TDKEENKQIA LGTSKLNYLD PRISIAWCKK
FGVPIEKIYN KTQRDKFAWA IDMADEDFEF
//
