Reviewed, UniProtKB/Swiss-Prot Q2FHI8 (TOP1_STAA3)

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:	SAUSA300_1143

Organism

Staphylococcus aureus (strain USA300) [Complete proteome] [HAMAP]

Taxonomic identifier

367830 [NCBI]

Taxonomic lineage

Bacteria › Firmicutes › Bacillales › Staphylococcus

Protein attributes

Sequence length	689 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
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 By similarity.
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 By similarity.
Sequence similarities	Belongs to the prokaryotic type I/III topoisomerase family.

Ontologies

Keywords
Domain	Repeat Zinc-finger
Ligand	ATP-binding DNA-binding Metal-binding Nucleotide-binding Zinc
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 zinc ion binding Inferred from electronic annotation. Source: UniProtKB-KW
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 689	689	DNA topoisomerase 1		PRO_0000285943
Regions
	Zinc finger	577 – 603	27	C4-type 1
	Zinc finger	617 – 645	29	C4-type 2
	Zinc finger	658 – 681	24	C4-type 3
Sites
	Active site	298	1	For DNA cleavage activity By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q2FHI8-1 [UniParc]. Last modified May 1, 2007. Version 2. Checksum: 1F28D3BC10BDADE1	FASTA	689	79,113
	10 20 30 40 50 60 MADNLVIVES PAKAKTIEKY LGKKYKVIAS MGHVRDLPRS QMGVDTEDNY EPKYITIRGK 70 80 90 100 110 120 GPVVKELKKH AKKAKNVFLA SDPDREGEAI AWHLSKILEL EDSKENRVVF NEITKDAVKE 130 140 150 160 170 180 SFKNPREIEM NLVDAQQARR ILDRLVGYNI SPVLWKKVKK GLSAGRVQSV ALRLVIDREN 190 200 210 220 230 240 EIRNFKPEEY WTIEGEFRYK KSKFNAKFLH YKNKPFKLKT KKDVEKITAA LDGDQFEITN 250 260 270 280 290 300 VTKKEKTRNP ANPFTTSTLQ QEAARKLNFK ARKTMMVAQQ LYEGIDLKKQ GTIGLITYMR 310 320 330 340 350 360 TDSTRISDTA KVEAKQYITD KYGESYTSKR KASGKQGDQD AHEAIRPSST MRTPDDMKSF 370 380 390 400 410 420 LTKDQYRLYK LIWERFVASQ MAPAILDTVS LDITQGDIKF RANGQTIKFK GFMTLYVETK 430 440 450 460 470 480 DDSDSEKENK LPKLEQGDKV TATQIEPAQH YTQPPPRYTE ARLVKTLEEL KIGRPSTYAP 490 500 510 520 530 540 TIDTIQKRNY VKLESKRFVP TELGEIVHEQ VKEYFPEIID VEFTVNMETL LDKIAEGDIT 550 560 570 580 590 600 WRKVIDGFFS SFKQDVERAE EEMEKIEIKD EPAGEDCEIC GSPMVIKMGR YGKFMACSNF 610 620 630 640 650 660 PDCRNTKAIV KSIGVKCPKC NDGDVVERKS KKNRVFYGCS KYPECDFISW DKPIGRDCPK 670 680 CNQYLVENKK GKTTQVICSN CDYKEAAQK

References

[1]

"Complete genome sequence of USA300, an epidemic clone of community-acquired meticillin-resistant Staphylococcus aureus." Diep B.A., Gill S.R., Chang R.F., Phan T.H., Chen J.H., Davidson M.G., Lin F., Lin J., Carleton H.A., Mongodin E.F., Sensabaugh G.F., Perdreau-Remington F. Lancet 367:731-739(2006) [PubMed: 16517273] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	CP000255 Genomic DNA. Translation: ABD21813.1. Different initiation.
RefSeq	YP_493840.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	3915296.
GenomeReviews	Gene locus SAUSA300_1143 in contig CP000255_GR.
KEGG	saa:SAUSA300_1143.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q2FHI8.
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. IPR013498. Topo_IA_Znf. IPR005733. TopoI_bac. IPR006171. Toprim_domain. IPR006154. Toprim_sub. [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. PF01396. zf-C4_Topoisom. 3 hits. [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_STAA3

Accession

Primary (citable) accession number: Q2FHI8

Entry history

Integrated into UniProtKB/Swiss-Prot:	May 1, 2007
Last sequence update:	May 1, 2007
Last modified:	June 16, 2009
This is version 25 of the entry and version 2 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

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