Reviewed, UniProtKB/Swiss-Prot Q87AQ6 (TOP1_XYLFT)

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
    Untwisting enzyme
    Swivelase

Gene names

Name:	topA
Ordered Locus Names:	PD_1767

Organism

Xylella fastidiosa (strain Temecula1 / ATCC 700964) [Complete proteome] [HAMAP]

Taxonomic identifier

183190 [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	The reaction catalyzed by topoisomerases leads to the conversion of one topological isomer of DNA to another.
Catalytic activity	ATP-independent breakage of single-stranded DNA, followed by passage and rejoining.
Subunit structure	Monomer By similarity.
Miscellaneous	When a topoisomerase transiently breaks a DNA backbone bond, it simultaneously forms a protein-DNA link, in which a tyrosyl oxygen in the enzyme is joined to a DNA phosphorus at one end of the enzyme-severed DNA strand.
Sequence similarities	Belongs to the prokaryotic type I/III 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 DNA unwinding during replication 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_0000145173
Regions
	Domain	3 – 115	113	Toprim
Sites
	Active site	308	1	For DNA cleavage activity By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q87AQ6-1 [UniParc]. Last modified June 16, 2003. Version 1. Checksum: 2F23C4675BEA8363	FASTA	815	91,802
	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 CTHPAQHFSA KLIKLDGKKF EQFTITDSDT AAAAQRRIQQ 250 260 270 280 290 300 AAQGRLHITD 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 LYELVWKRTV 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 GRAVSKFLSS HFTQYVDYDF 550 560 570 580 590 600 TAHLEDELDA ISRGEEEWIP LMKKFWVPFK ELVEDKKDSL DKTDAGSVRL LGIDPTSGKE 610 620 630 640 650 660 VSARIGRFGP MVQIGTVDDE EKPRFASLRP NQSIYSISLE EAIELFKMPR VLGEDQSQQV 670 680 690 700 710 720 SVGIGRFGPF AKRGSTYVSL KSEDDPYTID LARATLLINE KEEIARNRII KDFENSQIQV 730 740 750 760 770 780 LNGRFGPYIS DGKLNGKIPK DREPASLTLE EAQQLLINTG KPARKNFSTK KTATKNETRK 790 800 810 QTTKKRTTDA KATKKVSDKP VKKQIKKRIA PNITQ

References

[1]

"Comparative analyses of the complete genome sequences of Pierce's disease and citrus variegated chlorosis strains of Xylella fastidiosa." Van Sluys M.A., de Oliveira M.C., Monteiro-Vitorello C.B., Miyaki C.Y., Furlan L.R., Camargo L.E.A., da Silva A.C.R., Moon D.H., Takita M.A., Lemos E.G.M., Machado M.A., Ferro M.I.T., da Silva F.R., Goldman M.H.S., Goldman G.H., Lemos M.V.F., El-Dorry H., Tsai S.M. , Carrer H., Carraro D.M., de Oliveira R.C., Nunes L.R., Siqueira W.J., Coutinho L.L., Kimura E.T., Ferro E.S., Harakava R., Kuramae E.E., Marino C.L., Giglioti E., Abreu I.L., Alves L.M.C., do Amaral A.M., Baia G.S., Blanco S.R., Brito M.S., Cannavan F.S., Celestino A.V., da Cunha A.F., Fenille R.C., Ferro J.A., Formighieri E.F., Kishi L.T., Leoni S.G., Oliveira A.R., Rosa V.E. Jr., Sassaki F.T., Sena J.A.D., de Souza A.A., Truffi D., Tsukumo F., Yanai G.M., Zaros L.G., Civerolo E.L., Simpson A.J.G., Almeida N.F. Jr., Setubal J.C., Kitajima J.P. J. Bacteriol. 185:1018-1026(2003) [PubMed: 12533478] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBL GenBank DDBJ	AE009442 Genomic DNA. Translation: AAO29601.1.
RefSeq	NP_779952.1.
3D structure databases
SMR	Q87AQ6. Positions 3-569, 4-614.
ModBase	Search...
Protein-protein interaction databases
STRING	Q87AQ6.
Genome annotation databases
GeneID	1143109.
GenomeReviews	Gene locus PD_1767 in contig AE009442_GR.
KEGG	xft:PD1767.
Organism-specific databases
CMR	Search...
Phylogenomic databases
eggNOG	COG0550.
HOGENOM	HBG512935.
OMA	YGPYLKK.
Enzyme and pathway databases
BioCyc	XFAS183190:PD_1767-MONOMER.
Family and domain databases
InterPro	IPR003601. Topo_IA_2. IPR013497. Topo_IA_cen. IPR013824. Topo_IA_cen_sub1. IPR013826. Topo_IA_cen_sub3. IPR000380. Topo_IA_core. IPR003602. Topo_IA_DNA_bd. IPR005733. TopoI_bac. IPR006154. Toprim_dom_subgr. IPR006171. Toprim_domain. [Graphical view]
Gene3D	G3DSA:1.10.460.10. Topo_IA_cen_sub1. 2 hits. G3DSA:1.10.290.10. Topo_IA_cen_sub3. 1 hit.
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]
TIGRFAMs	TIGR01051. topA_bact. 1 hit.
PROSITE	PS00396. TOPOISOMERASE_I_PROK. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

TOP1_XYLFT

Accession

Primary (citable) accession number: Q87AQ6

Entry history

Integrated into UniProtKB/Swiss-Prot:	June 16, 2003
Last sequence update:	June 16, 2003
Last modified:	February 9, 2010
This is version 46 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)