ID A0A0X1S0L6_9BACL Unreviewed; 695 AA.
AC A0A0X1S0L6;
DT 13-APR-2016, integrated into UniProtKB/TrEMBL.
DT 13-APR-2016, sequence version 1.
DT 27-MAR-2024, entry version 39.
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 ECO:0000313|EMBL:AMA64300.1};
GN ORFNames=ASO14_2162 {ECO:0000313|EMBL:AMA64300.1};
OS Kurthia sp. 11kri321.
OC Bacteria; Bacillota; Bacilli; Bacillales; Planococcaceae; Kurthia.
OX NCBI_TaxID=1750719 {ECO:0000313|EMBL:AMA64300.1, ECO:0000313|Proteomes:UP000058129};
RN [1] {ECO:0000313|EMBL:AMA64300.1, ECO:0000313|Proteomes:UP000058129}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=11kri321 {ECO:0000313|EMBL:AMA64300.1,
RC ECO:0000313|Proteomes:UP000058129};
RA Zhang Y., Guo Z.;
RL Submitted (NOV-2015) to the EMBL/GenBank/DDBJ databases.
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}.
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DR EMBL; CP013217; AMA64300.1; -; Genomic_DNA.
DR RefSeq; WP_068454908.1; NZ_CP013217.1.
DR AlphaFoldDB; A0A0X1S0L6; -.
DR STRING; 1750719.ASO14_2162; -.
DR KEGG; kur:ASO14_2162; -.
DR PATRIC; fig|1750719.3.peg.2108; -.
DR OrthoDB; 9804262at2; -.
DR Proteomes; UP000058129; Chromosome.
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 GO; GO:0006351; P:DNA-templated transcription; IEA:InterPro.
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; 2.
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; IPR001529; DNA-dir_RNA_pol_M/15kDasu.
DR InterPro; IPR000380; Topo_IA.
DR InterPro; IPR003601; Topo_IA_2.
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; 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; PF02150; RNA_POL_M_15KD; 1.
DR Pfam; PF01131; Topoisom_bac; 1.
DR Pfam; PF01751; Toprim; 1.
DR Pfam; PF01396; zf-C4_Topoisom; 2.
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; 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:UP000058129};
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 3..121
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 300
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 148
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 302
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 494
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
SQ SEQUENCE 695 AA; 79422 MW; 003DDCD63E553C67 CRC64;
MSDYLVIVES PAKAKTIERY LGKKYKVKAS IGHVRDLPRS QTGIDTENNY EPRYITIRGK
GPVLQELKTA AKKAKKIYLA ADPDREGEAI AWHLATALNI DIESDCRVVF NEITKDAIKE
SFKHPRPIDL DLVDAQQARR ILDRLVGYNI SPLLWKKVKK GLSAGRVQSI ALRLIIDREN
EIKNFQPEEY WSIEASFEKG KKVFDAAFYG TTSDKIKLTN EAEVQNILKQ IKGEDFEVTK
VLKRERKRNA APSFTTSSLQ QEAARKLNFR AKKTMMLAQQ LYEGIDLGKK AGGIVGLITY
MRTDSTRISE TAKKEAHEYI LENYGEEYTT PVEQQAKKSE KAQDAHEAIR PTSTMRHPDT
LKTVLSRDQL RLYRLIWERF IASQMASAVL DTVTADLQNG DLLFRATGSQ VKFPGFMKVY
IEGSDDQKEE KSKDKLLPPM EQGDLVKTVE IEPKQHFTQP PPRFSEARLV KTLEELGIGR
PSTYAPTLDT IQKRGYVTLE TKRFVPTELG EIVHSLVLEF FSDIVNIEFT AKMENDLDLI
EEGQKQWVEV IDEFYKDFEK DLKHAEVAME KVEIKDEPAG EDCELCGHPM VFKLGRYGKF
MACSNFPECR NTKAIVKEIG VKCPTCKEGE IVERKSKTKR IFYGCNRYPD CDFVSWDKPI
SRPCPKCNEM LVEKKIKKGV QIQCTSCDYK EEPTQ
//
