Q9PEV8 (TOP1_XYLFA) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
DNA topoisomerase 1
EC=5.99.1.2

Alternative name(s):
DNA topoisomerase I
Omega-protein
Relaxing enzyme
Swivelase
Untwisting enzyme

Gene names

Name:	topA
Ordered Locus Names:	XF_0920

Organism

Xylella fastidiosa [Complete proteome] [HAMAP]

Taxonomic identifier

2371 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Xanthomonadales › Xanthomonadaceae › Xylella

Protein attributes

Sequence length	815 AA.
Sequence status	Complete.
Protein existence	Inferred from homology

General annotation (Comments)

Function	Releases the supercoiling and torsional tension of DNA introduced during the DNA replication and transcription by transiently cleaving and rejoining one strand of the DNA duplex. Introduces a single-strand break via transesterification at a target site in duplex DNA. The scissile phosphodiester is attacked by the catalytic tyrosine of the enzyme, resulting in the formation of a DNA-(5'-phosphotyrosyl)-enzyme intermediate and the expulsion of a 3'-OH DNA strand. The free DNA strand than undergoes passage around the unbroken strand thus removing DNA supercoils. Finally, in the religation step, the DNA 3'-OH attacks the covalent intermediate to expel the active-site tyrosine and restore the DNA phosphodiester backbone By similarity.
Catalytic activity	ATP-independent breakage of single-stranded DNA, followed by passage and rejoining.
Subunit structure	Monomer By similarity.
Sequence similarities	Belongs to the type IA topoisomerase family. Contains 1 Toprim domain.

Ontologies

Keywords
Ligand	ATP-binding DNA-binding Nucleotide-binding
Molecular function	Isomerase Topoisomerase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	DNA topological change Inferred from electronic annotation. Source: InterPro
Cellular component	chromosome Inferred from electronic annotation. Source: InterPro
Molecular function	ATP binding Inferred from electronic annotation. Source: UniProtKB-KW DNA topoisomerase type I activity Inferred from electronic annotation. Source: EC
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 815	815	DNA topoisomerase 1		PRO_0000145172
Regions
	Domain	3 – 115	113	Toprim
Sites
	Active site	308	1	O-(5'-phospho-DNA)-tyrosine intermediate By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q9PEV8 [UniParc]. Last modified October 1, 2000. Version 1. Checksum: 65BC01306E1EB1C5	FASTA	815	91,803
	10 20 30 40 50 60 MPKHLLIVES PAKAKTINKY LGKDFTVLAS YGHVRDLVPK EGAVDPENGF AMRYDLIDKN 70 80 90 100 110 120 EKHVEAITKA AKTADSIYLA TDPDREGEAI SWHISEILKE RGLLKDKPMQ RIVFTEITPR 130 140 150 160 170 180 AIKEAIQKPR MIASDLVDAQ QARRALDYLV GFNLSPVLWR KVQRGLSAGR VQSPALRMIV 190 200 210 220 230 240 EREEEIEAFI TREYWSIHAE CAHPAQHFSA KLIKLDGQKF EQFTITDSDT AAAAQRRIQQ 250 260 270 280 290 300 VAQGRLHITD VTNKERKRRP APPFITSTLQ QEASRKLGFT TRKTMQIAQK LYEGIALGEE 310 320 330 340 350 360 GSVGLITYMR TDSVNLSLDA LSEIRDIIAR DYGTNALPDK PNVYTTKSKN AQEAHEAVRP 370 380 390 400 410 420 TSALRTPTQV APYLSNEEHR LYELVWKRAV ASQMIPAILN TTSVDLAAGN EHVFRATGTT 430 440 450 460 470 480 VVVQGFLAVY EEGKDNKNAE DDDEGRKLPV MKTGENVPLE RILTEQHFTQ PPPRYTEAAL 490 500 510 520 530 540 VKALEEYGIG RPSTYASIIQ TLLFRKYVDM EGRSFRPTDI GRAVSKFLAS HFTRYVDYDF 550 560 570 580 590 600 TAHLEDELDA ISRGEEEWIP LMKKFWVPFK ELVEDKKDSL DKTDAGSVRL LGIDPTSGKE 610 620 630 640 650 660 VSGRIGRFGP MVQIGTVDDE EKPRFASLRP NQSIYSISLE EAIELFKMPR VLGEDQSQQV 670 680 690 700 710 720 SVGIGRFGPF AKRGSTYVSL KSEDDPYTID LARATFLINE KEEIARNRII KNFENSQIQV 730 740 750 760 770 780 LNGRFGPYIS DGKLNGKIPK DREPASLTLE EAQQLLIDTG KPARKNFSTK KTATKNETRK 790 800 810 QTTKKRTTDA KATKKVSDKP VKKQIKKRIA PNITE

References

[1]

"The genome sequence of the plant pathogen Xylella fastidiosa." Simpson A.J.G., Reinach F.C., Arruda P., Abreu F.A., Acencio M., Alvarenga R., Alves L.M.C., Araya J.E., Baia G.S., Baptista C.S., Barros M.H., Bonaccorsi E.D., Bordin S., Bove J.M., Briones M.R.S., Bueno M.R.P., Camargo A.A., Camargo L.E.A. , Carraro D.M., Carrer H., Colauto N.B., Colombo C., Costa F.F., Costa M.C.R., Costa-Neto C.M., Coutinho L.L., Cristofani M., Dias-Neto E., Docena C., El-Dorry H., Facincani A.P., Ferreira A.J.S., Ferreira V.C.A., Ferro J.A., Fraga J.S., Franca S.C., Franco M.C., Frohme M., Furlan L.R., Garnier M., Goldman G.H., Goldman M.H.S., Gomes S.L., Gruber A., Ho P.L., Hoheisel J.D., Junqueira M.L., Kemper E.L., Kitajima J.P., Krieger J.E., Kuramae E.E., Laigret F., Lambais M.R., Leite L.C.C., Lemos E.G.M., Lemos M.V.F., Lopes S.A., Lopes C.R., Machado J.A., Machado M.A., Madeira A.M.B.N., Madeira H.M.F., Marino C.L., Marques M.V., Martins E.A.L., Martins E.M.F., Matsukuma A.Y., Menck C.F.M., Miracca E.C., Miyaki C.Y., Monteiro-Vitorello C.B., Moon D.H., Nagai M.A., Nascimento A.L.T.O., Netto L.E.S., Nhani A. Jr., Nobrega F.G., Nunes L.R., Oliveira M.A., de Oliveira M.C., de Oliveira R.C., Palmieri D.A., Paris A., Peixoto B.R., Pereira G.A.G., Pereira H.A. Jr., Pesquero J.B., Quaggio R.B., Roberto P.G., Rodrigues V., de Rosa A.J.M., de Rosa V.E. Jr., de Sa R.G., Santelli R.V., Sawasaki H.E., da Silva A.C.R., da Silva A.M., da Silva F.R., Silva W.A. Jr., da Silveira J.F., Silvestri M.L.Z., Siqueira W.J., de Souza A.A., de Souza A.P., Terenzi M.F., Truffi D., Tsai S.M., Tsuhako M.H., Vallada H., Van Sluys M.A., Verjovski-Almeida S., Vettore A.L., Zago M.A., Zatz M., Meidanis J., Setubal J.C. Nature 406:151-159(2000) [PubMed: 10910347] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: 9a5c.

+

Additional computationally mapped references.

Cross-references

Sequence databases
EMBL GenBank DDBJ	AE003849 Genomic DNA. Translation: AAF83730.1.
PIR	B82746.
RefSeq	NP_298210.1. NC_002488.3.
3D structure databases
ProteinModelPortal	Q9PEV8.
ModBase	Search...
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	1126456.
GenomeReviews	Gene locus XF_0920 in contig AE003849_GR.
KEGG	xfa:XF0920.
NMPDR	fig|160492.1.peg.917.
PATRIC	24131894. VBIXylFas578_0986.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	HBG512935.
OMA	KKVMPRL.
ProtClustDB	PRK08780.
Enzyme and pathway databases
BioCyc	XFAS160492:XF0920-MONOMER.
Family and domain databases
InterPro	IPR000380. Topo_IA. IPR003601. Topo_IA_2. IPR023406. Topo_IA_AS. IPR013497. Topo_IA_cen. IPR013824. Topo_IA_cen_sub1. IPR013825. Topo_IA_cen_sub2. IPR023405. Topo_IA_core_domain. IPR003602. Topo_IA_DNA-bd. IPR005733. TopoI_bac-type. IPR006171. Toprim_domain. [Graphical view]
Gene3D	G3DSA:1.10.460.10. Topo_IA_cen_sub1. 2 hits. G3DSA:2.70.20.10. Topo_IA_cen_sub2. 2 hits.
KO	K03168.
PANTHER	PTHR11390. Topo_IA. 1 hit.
Pfam	PF01131. Topoisom_bac. 1 hit. PF01751. Toprim. 1 hit. [Graphical view]
PRINTS	PR00417. PRTPISMRASEI.
SMART	SM00437. TOP1Ac. 1 hit. SM00436. TOP1Bc. 1 hit. SM00493. TOPRIM. 1 hit. [Graphical view]
SUPFAM	SSF56712. Topo_IA_core. 1 hit.
TIGRFAMs	TIGR01051. TopA_bact. 1 hit.
PROSITE	PS00396. TOPOISOMERASE_I_PROK. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

TOP1_XYLFA

Accession

Primary (citable) accession number: Q9PEV8

Entry history

Integrated into UniProtKB/Swiss-Prot:	June 16, 2003
Last sequence update:	October 1, 2000
Last modified:	January 25, 2012
This is version 66 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program