ID A0A0A0EJX5_9RHOB Unreviewed; 885 AA.
AC A0A0A0EJX5;
DT 07-JAN-2015, integrated into UniProtKB/TrEMBL.
DT 07-JAN-2015, sequence version 1.
DT 27-MAR-2024, entry version 44.
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=ATO9_05410 {ECO:0000313|EMBL:KGM49462.1};
OS Pseudooceanicola atlanticus.
OC Bacteria; Pseudomonadota; Alphaproteobacteria; Rhodobacterales;
OC Paracoccaceae; Pseudooceanicola.
OX NCBI_TaxID=1461694 {ECO:0000313|EMBL:KGM49462.1, ECO:0000313|Proteomes:UP000030004};
RN [1] {ECO:0000313|EMBL:KGM49462.1, ECO:0000313|Proteomes:UP000030004}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=22II-s11g {ECO:0000313|EMBL:KGM49462.1,
RC ECO:0000313|Proteomes:UP000030004};
RX PubMed=25663028; DOI=10.1007/s10482-015-0398-2;
RA Lai Q., Li G., Liu X., Du Y., Sun F., Shao Z.;
RT "Pseudooceanicola atlanticus gen. nov. sp. nov., isolated from surface
RT seawater of the Atlantic Ocean and reclassification of Oceanicola
RT batsensis, Oceanicola marinus, Oceanicola nitratireducens, Oceanicola
RT nanhaiensis, Oceanicola antarcticus and Oceanicola flagellatus, as
RT Pseudooceanicola batsensis comb. nov., Pseudooceanicola marinus comb. nov.,
RT Pseudooceanicola nitratireducens comb. nov., Pseudooceanicola nanhaiensis
RT comb. nov., Pseudooceanicola antarcticus comb. nov., and Pseudooceanicola
RT flagellatus comb. nov.";
RL Antonie Van Leeuwenhoek 107:1065-1074(2015).
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:KGM49462.1}.
CC ---------------------------------------------------------------------------
CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC ---------------------------------------------------------------------------
DR EMBL; AQQX01000002; KGM49462.1; -; Genomic_DNA.
DR RefSeq; WP_043746353.1; NZ_AQQX01000002.1.
DR AlphaFoldDB; A0A0A0EJX5; -.
DR STRING; 1461694.ATO9_05410; -.
DR eggNOG; COG0550; Bacteria.
DR eggNOG; COG1754; Bacteria.
DR OrthoDB; 9804262at2; -.
DR Proteomes; UP000030004; Unassembled WGS sequence.
DR GO; GO:0005694; C:chromosome; IEA:InterPro.
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; 3.30.65.10; Bacterial Topoisomerase I, domain 1; 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; IPR013498; Topo_IA_Znf.
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 Pfam; PF01396; zf-C4_Topoisom; 1.
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 SUPFAM; SSF57783; Zinc beta-ribbon; 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:UP000030004};
KW Topoisomerase {ECO:0000256|ARBA:ARBA00023029, ECO:0000256|HAMAP-
KW Rule:MF_00952}; Zinc {ECO:0000256|ARBA:ARBA00022833};
KW Zinc-finger {ECO:0000256|ARBA:ARBA00022771}.
FT DOMAIN 1..116
FT /note="Toprim"
FT /evidence="ECO:0000259|PROSITE:PS50880"
FT REGION 166..171
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT REGION 630..650
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 666..686
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 768..793
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 834..885
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 839..868
FT /note="Basic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT ACT_SITE 296
FT /note="O-(5'-phospho-DNA)-tyrosine intermediate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 31
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 142
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 146
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 158
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 298
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 490
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
SQ SEQUENCE 885 AA; 98444 MW; 66473328DDCEC7FA CRC64;
MPVVVVESPA KAKTINKYLG SDYTVLASYG HVRDLPPKDG SVDPEHEFDM KWEVASDSKK
HVKAIADALK DDNALILATD PDREGEAISW HLEEALRNRK AIKKDTPVSR VVFNAITKNA
VTEAMQNPRQ VDSDLVEAYL ARRALDYLVG FNLSPVLWRK LPGAKSAGRV QSVCLRLIVE
REMEIEAFRA REYWSVKALL ATPRGQEFEA RLTILGGKKL DRYDIADSTA AELAVQAITS
RDLTVQSVEA KPASRNPSPP FMTSTLQQEA SRKFGMGARQ TMQAAQRLYE AGHITYMRTD
GIDMAPEAVE ACRAAIGDRF GKEYVPGSAR VYKNKAKNAQ EAHECIRPTD MTADADGLRL
TEADQKKLYD LIWKRTLACQ MESARLERTT VDITSRDEQV GLRATGQVVL FDGFLRIYEE
GRDDVVDDDD KRLPQISQGD KMDKRSITPE QHFTQPPPRY TEATLVKRME ELGIGRPSTY
ASIVTTIQDR GYVRKDKNRL FPEDKGRLVT AFLENYFRRY VEYDFTADLE GELDDVSAGD
RDYKDVLNRF WRDFSAAISE TSELRITEVL EKINEVLEPH LFPPNEEGTD PRICPNCGEG
RLSMRTARSG GAFIGCSNYP ECRYTRPFGP PDPEAEASAI PPEGKLLGED EGDEIRVFKG
RFGPYVQRGP VTEENKKPPR QSVPKDWVPE DLTLEQGVML LTLPRLIGTH PEDGVNVWAN
IGRYGPYIKH ADTTSDRGGT NANLDGIDEV WTVGMNRAVQ LLAEKVASRG RRGQPATPIR
ELGEHPDAGG PVNVYDGKYG PYVKWDKINA TIPDTVEVDA LTLGQAVELI AERAAKSGKK
APAKKKAPAK KTATKKTAAK KTTAKKTTAK KPAAKTTAKK ADDAE
//
