ID R9H3G6_9SPHI Unreviewed; 781 AA.
AC R9H3G6;
DT 24-JUL-2013, integrated into UniProtKB/TrEMBL.
DT 24-JUL-2013, sequence version 1.
DT 27-MAR-2024, entry version 46.
DE RecName: Full=DNA topoisomerase 1 {ECO:0000256|HAMAP-Rule:MF_00952};
DE EC=5.6.2.1 {ECO:0000256|HAMAP-Rule:MF_00952};
DE AltName: Full=DNA topoisomerase I {ECO:0000256|HAMAP-Rule:MF_00952};
GN Name=topA {ECO:0000256|HAMAP-Rule:MF_00952};
GN ORFNames=ADIARSV_1022 {ECO:0000313|EMBL:EOR95709.1};
OS Arcticibacter svalbardensis MN12-7.
OC Bacteria; Bacteroidota; Sphingobacteriia; Sphingobacteriales;
OC Sphingobacteriaceae; Arcticibacter.
OX NCBI_TaxID=1150600 {ECO:0000313|EMBL:EOR95709.1, ECO:0000313|Proteomes:UP000014174};
RN [1] {ECO:0000313|EMBL:EOR95709.1, ECO:0000313|Proteomes:UP000014174}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=MN12-7 {ECO:0000313|EMBL:EOR95709.1,
RC ECO:0000313|Proteomes:UP000014174};
RX PubMed=23846277;
RA Shivaji S., Ara S., Prasad S., Manasa B.P., Begum Z., Singh A.,
RA Kumar Pinnaka A.;
RT "Draft Genome Sequence of Arcticibacter svalbardensis Strain MN12-7T, a
RT Member of the Family Sphingobacteriaceae Isolated from an Arctic Soil
RT Sample.";
RL Genome Announc. 1:E00484-13(2013).
CC -!- FUNCTION: Releases the supercoiling and torsional tension of DNA, which
CC is introduced during the DNA replication and transcription, by
CC transiently cleaving and rejoining one strand of the DNA duplex.
CC Introduces a single-strand break via transesterification at a target
CC site in duplex DNA. The scissile phosphodiester is attacked by the
CC catalytic tyrosine of the enzyme, resulting in the formation of a DNA-
CC (5'-phosphotyrosyl)-enzyme intermediate and the expulsion of a 3'-OH
CC DNA strand. The free DNA strand then undergoes passage around the
CC unbroken strand, thus removing DNA supercoils. Finally, in the
CC religation step, the DNA 3'-OH attacks the covalent intermediate to
CC expel the active-site tyrosine and restore the DNA phosphodiester
CC backbone. {ECO:0000256|HAMAP-Rule:MF_00952}.
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, ECO:0000256|HAMAP-
CC Rule:MF_00952};
CC -!- SUBUNIT: Monomer. {ECO:0000256|HAMAP-Rule:MF_00952}.
CC -!- SIMILARITY: Belongs to the type IA topoisomerase family.
CC {ECO:0000256|ARBA:ARBA00009446, ECO:0000256|HAMAP-Rule:MF_00952}.
CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_00952}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:EOR95709.1}.
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DR EMBL; AQPN01000043; EOR95709.1; -; Genomic_DNA.
DR RefSeq; WP_016194266.1; NZ_AQPN01000043.1.
DR AlphaFoldDB; R9H3G6; -.
DR STRING; 1150600.ADIARSV_1022; -.
DR PATRIC; fig|1150600.3.peg.1004; -.
DR eggNOG; COG0550; Bacteria.
DR OrthoDB; 9804262at2; -.
DR Proteomes; UP000014174; Unassembled WGS sequence.
DR GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR GO; GO:0003917; F:DNA topoisomerase type I (single strand cut, ATP-independent) activity; IEA:UniProtKB-UniRule.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0006265; P:DNA topological change; IEA:UniProtKB-UniRule.
DR CDD; cd00186; TOP1Ac; 1.
DR CDD; cd03363; TOPRIM_TopoIA_TopoI; 1.
DR Gene3D; 3.40.50.140; -; 1.
DR Gene3D; 1.10.460.10; Topoisomerase I, domain 2; 1.
DR Gene3D; 2.70.20.10; Topoisomerase I, domain 3; 1.
DR Gene3D; 1.10.290.10; Topoisomerase I, domain 4; 1.
DR HAMAP; MF_00952; Topoisom_1_prok; 1.
DR InterPro; IPR000380; Topo_IA.
DR InterPro; IPR003601; Topo_IA_2.
DR InterPro; IPR023406; Topo_IA_AS.
DR InterPro; IPR013497; Topo_IA_cen.
DR InterPro; IPR013824; Topo_IA_cen_sub1.
DR InterPro; IPR013825; Topo_IA_cen_sub2.
DR InterPro; IPR013826; Topo_IA_cen_sub3.
DR InterPro; IPR023405; Topo_IA_core_domain.
DR InterPro; IPR003602; Topo_IA_DNA-bd_dom.
DR InterPro; IPR005733; TopoI_bac-type.
DR InterPro; IPR028612; Topoisom_1_IA.
DR InterPro; IPR025589; Toprim_C_rpt.
DR InterPro; IPR006171; TOPRIM_domain.
DR InterPro; IPR034149; TOPRIM_TopoI.
DR NCBIfam; TIGR01051; topA_bact; 1.
DR PANTHER; PTHR42785:SF1; DNA TOPOISOMERASE; 1.
DR PANTHER; PTHR42785; DNA TOPOISOMERASE, TYPE IA, CORE; 1.
DR Pfam; PF01131; Topoisom_bac; 1.
DR Pfam; PF01751; Toprim; 1.
DR Pfam; PF13368; Toprim_C_rpt; 3.
DR PRINTS; PR00417; PRTPISMRASEI.
DR SMART; SM00437; TOP1Ac; 1.
DR SMART; SM00436; TOP1Bc; 1.
DR SMART; SM00493; TOPRIM; 1.
DR SUPFAM; SSF56712; Prokaryotic type I DNA topoisomerase; 1.
DR PROSITE; PS00396; TOPOISOMERASE_I_PROK; 1.
DR PROSITE; PS50880; TOPRIM; 1.
PE 3: Inferred from homology;
KW DNA-binding {ECO:0000256|ARBA:ARBA00023125, ECO:0000256|HAMAP-
KW Rule:MF_00952};
KW Isomerase {ECO:0000256|ARBA:ARBA00023235, ECO:0000256|HAMAP-Rule:MF_00952};
KW Magnesium {ECO:0000256|ARBA:ARBA00022842};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723};
KW Reference proteome {ECO:0000313|Proteomes:UP000014174};
KW Topoisomerase {ECO:0000256|ARBA:ARBA00023029, ECO:0000256|HAMAP-
KW Rule:MF_00952}.
FT DOMAIN 3..113
FT /note="Toprim"
FT /evidence="ECO:0000259|PROSITE:PS50880"
FT REGION 163..168
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT ACT_SITE 285
FT /note="O-(5'-phospho-DNA)-tyrosine intermediate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 33
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 139
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 140
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 143
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 155
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 287
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 482
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
SQ SEQUENCE 781 AA; 88438 MW; F18D728B6244AB12 CRC64;
MAKNLLIVES PAKAKTIEGY LGSDFMVRSS YGHIRDLVKT DDAIDVNNNF TQRYEVPADK
KAVVSELKKL AKEAEMVWLA SDEDREGEAI SWHLFETLGL KDEKTKRIVF HEITKPAILK
AIDSPRTIDY NLVYAQQARR VLDRLVGFEL SPILWKKVKP SLSAGRVQSV AVRLIVERER
EINKFTPIAA YKVTAIFSTD KAKEIFKAEL PDRFDTEAEA TDFLNACMDA TYKVTSVESK
PTKRNPSAPF TTSTLQQEAS RKLGFSVSRT MLIAQKLYES GKITYMRTDS VNLSDTALEA
ATNEINNAYG EKYHQHRKYK TKSAGAQEAH EAIRPTYFDV HSIDGDASEK RLYELIWKRS
IASQMSEAQF EKTIAKINIS TRKENFTANG EVMKFDGFLK VYMESVDDDL EQDVNLDEDA
DNALLPPLTK DQSLVNQEIK ATERYSRPPA RYTEASLVKK LEELGIGRPS TYAPTISTVQ
NRGYVLKEDR EGKSRNFNVL TLAKSTVVKD IKTEITGAEK SKLFPTDIGA VVNDFLVQHF
KGIVDFHFTA SVEKEFDEIA NGLKDWTEML KAFYSPFHAE VENTLLNAEK ARGERDLGEE
PGTGKKVSVR IGRYGPFVQI GDTEGEEKPR YASLRSGQMI ETITMDEAME LFRLPKVVGV
FEEKDMTVAI GRFGPYVRHN SIFHSLPKGV DPHSVTEEAC IEIIKEKRQK DAEKLIKTFD
EDPTVKILNG RWGPYIEYGK ANVKIPKDKE ASELTYEEVK VLFEAFEKEP KKATKKFAKK
K
//
