ID B4SH00_PELPB Unreviewed; 798 AA.
AC B4SH00;
DT 23-SEP-2008, integrated into UniProtKB/TrEMBL.
DT 23-SEP-2008, sequence version 1.
DT 27-MAR-2024, entry version 101.
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 OrderedLocusNames=Ppha_2842 {ECO:0000313|EMBL:ACF44988.1};
OS Pelodictyon phaeoclathratiforme (strain DSM 5477 / BU-1).
OC Bacteria; Chlorobiota; Chlorobiia; Chlorobiales; Chlorobiaceae;
OC Chlorobium/Pelodictyon group; Pelodictyon.
OX NCBI_TaxID=324925 {ECO:0000313|EMBL:ACF44988.1, ECO:0000313|Proteomes:UP000002724};
RN [1] {ECO:0000313|EMBL:ACF44988.1, ECO:0000313|Proteomes:UP000002724}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 5477 / BU-1 {ECO:0000313|Proteomes:UP000002724};
RG US DOE Joint Genome Institute;
RA Lucas S., Copeland A., Lapidus A., Glavina del Rio T., Dalin E., Tice H.,
RA Bruce D., Goodwin L., Pitluck S., Schmutz J., Larimer F., Land M.,
RA Hauser L., Kyrpides N., Mikhailova N., Liu Z., Li T., Zhao F., Overmann J.,
RA Bryant D.A., Richardson P.;
RT "Complete sequence of Pelodictyon phaeoclathratiforme BU-1.";
RL Submitted (JUN-2008) 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}.
CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_00952}.
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DR EMBL; CP001110; ACF44988.1; -; Genomic_DNA.
DR RefSeq; WP_012509456.1; NC_011060.1.
DR AlphaFoldDB; B4SH00; -.
DR STRING; 324925.Ppha_2842; -.
DR KEGG; pph:Ppha_2842; -.
DR eggNOG; COG0550; Bacteria.
DR eggNOG; COG0551; Bacteria.
DR HOGENOM; CLU_002929_4_3_10; -.
DR OrthoDB; 9804262at2; -.
DR Proteomes; UP000002724; 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 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; 3.
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; 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; PF01396; zf-C4_Topoisom; 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 SUPFAM; SSF57783; Zinc beta-ribbon; 3.
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:UP000002724};
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 13..123
FT /note="Toprim"
FT /evidence="ECO:0000259|PROSITE:PS50880"
FT REGION 173..178
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT ACT_SITE 309
FT /note="O-(5'-phospho-DNA)-tyrosine intermediate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 43
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 149
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 153
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 165
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 311
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 514
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
SQ SEQUENCE 798 AA; 89281 MW; 1B91AC776D1B57AD CRC64;
MASKPSTPSA RNRTLIVVES PSKAKTINKY LGDKYTVFAS VGHIKDLPKK EIGLDFDHHY
EPRYEIIPGK EKVVHQLKKL AAEADSILIA TDPDREGEAI AWHISKEIGV TSKPVSRVLF
NEITKTAIIA AIQAPRQIDD RLVRSQQTRQ GLDKIVGYKI SPFLWNVVLR GLSAGRVQSV
ALRLICEREA EISRFQIQEY WSIAAEFVTA GKESFKARLI RFEGDKPEIA NQKQAEALAA
LIRKGNFAVR EIAPRVQQRK QPLPFTTSLL QQAASNQLGF GSKKTMGVAQ QLYEGIDLGK
EGTTGLITYM RTDSTRIGEE AIAEARSYIN QQFGKEYIGF GGAAKPGKNA QDAHEAIRPT
SIFNKPDQVK PYLSADQFKL YELIWKRFLA SMMSAAKIEQ TRVDVEDSAS KFLFRATGSR
VLFPGFMRVY DDQKELDYEA QTSTKEEVEK ELTVKLPERL AVNEPLALDD LDQKQSFTRP
PARYSEATLV KDLDHFGIGR PSTYASIFST LQDRRYVELE KKKIVPTELG KDVSLILVAN
FPDLFNVDFT AFMENELDKV ASGEDEYEKV LDSFYKPLEA VLHLRKSNPI VPQNSEPVTC
EKCGEGLMVV KWTANGKFFG CSCYPKCKNI KAISNNKAKP VDSAILCPSC KEGHMLLRSG
RFGTFLACSG YPKCNTLLNL NKQRHIEPMK TPPVLTTLLC PKCGSPLYLR SGKRGLWLGC
SKFPKCKGRL AWSTLDEKAQ HHWEAIMAEH QKAHPTVQLT MIDGKAVPMT IPVDEIILKA
EEAGLITSPS EEIVEITP
//
