Reviewed, UniProtKB/Swiss-Prot P0A620 (TOP1_MYCTU)

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:	Rv3646c, MT3749
ORF Names:	MTCY15C10.06

Organism

Mycobacterium tuberculosis [Complete proteome] [HAMAP]

Taxonomic identifier

1773 [NCBI]

Taxonomic lineage

Bacteria › Actinobacteria › Actinobacteridae › Actinomycetales › Corynebacterineae › Mycobacteriaceae › Mycobacterium › Mycobacterium tuberculosis complex

Protein attributes

Sequence length	934 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.
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.

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 – 934	934	DNA topoisomerase 1		PRO_0000145159
Sites
	Active site	342	1	For DNA cleavage activity By similarity
Experimental info
	Sequence conflict	1	1	M → MERGAQL Ref.3
	Sequence conflict	53 – 61	9	PRAASDVPA → RGPRRCTR in AAC44599. Ref.3
	Sequence conflict	255 – 281	27	RDFDS…ATALA → AISTRWARCAKATKSLCSTR GARPRWP in AAC44599. Ref.3
	Sequence conflict	369 – 372	4	EYVA → GVRR in AAC44599. Ref.3
	Sequence conflict	797	1	G → V in AAC44599. Ref.3
	Sequence conflict	853 – 895	43	PLREL…DDVAS → ACASWEQIRRRASQWSSRTA DSGRTSPTVRPMPACVRATT WLP Ref.3

Sequences

	Sequence		Length	Mass (Da)
	P0A620-1 [UniParc]. Last modified March 15, 2005. Version 1. Checksum: B29E2C17897781BA	FASTA	934	102,336
	10 20 30 40 50 60 MADPKTKGRG SGGNGSGRRL VIVESPTKAR KLASYLGSGY IVESSRGHIR DLPRAASDVP 70 80 90 100 110 120 AKYKSQPWAR LGVNVDADFE PLYIISPEKR STVSELRGLL KDVDELYLAT DGDREGEAIA 130 140 150 160 170 180 WHLLETLKPR IPVKRMVFHE ITEPAIRAAA EHPRDLDIDL VDAQETRRIL DRLYGYEVSP 190 200 210 220 230 240 VLWKKVAPKL SAGRVQSVAT RIIVARERDR MAFRSAAYWD ILAKLDASVS DPDAAPPTFS 250 260 270 280 290 300 ARLTAVAGRR VATGRDFDSL GTLRKGDEVI VLDEGSATAL AAGLDGTQLT VASAEEKPYA 310 320 330 340 350 360 RRPYPPFMTS TLQQEASRKL RFSAERTMSI AQRLYENGYI TYMRTDSTTL SESAINAART 370 380 390 400 410 420 QARQLYGDEY VAPAPRQYTR KVKNAQEAHE AIRPAGETFA TPDAVRRELD GPNIDDFRLY 430 440 450 460 470 480 ELIWQRTVAS QMADARGMTL SLRITGMSGH QEVVFSATGR TLTFPGFLKA YVETVDELVG 490 500 510 520 530 540 GEADDAERRL PHLTPGQRLD IVELTPDGHA TNPPARYTEA SLVKALEELG IGRPSTYSSI 550 560 570 580 590 600 IKTIQDRGYV HKKGSALVPS WVAFAVTGLL EQHFGRLVDY DFTAAMEDEL DEIAAGNERR 610 620 630 640 650 660 TNWLNNFYFG GDHGVPDSVA RSGGLKKLVG INLEGIDARE VNSIKLFDDT HGRPIYVRVG 670 680 690 700 710 720 KNGPYLERLV AGDTGEPTPQ RANLSDSITP DELTLQVAEE LFATPQQGRT LGLDPETGHE 730 740 750 760 770 780 IVAREGRFGP YVTEILPEPA ADAAAAAQGV KKRQKAAGPK PRTGSLLRSM DLQTVTLEDA 790 800 810 820 830 840 LRLLSLPRVV GVDPASGEEI TAQNGRYGPY LKRGNDSRSL VTEDQIFTIT LDEALKIYAE 850 860 870 880 890 900 PKRRGRQSAS APPLRELGTD PASGKPMVIK DGRFGPYVTD GETNASLRKG DDVASITDER 910 920 930 AAELLADRRA RGPAKRPARK AARKVPAKKA AKRD

References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	"Deciphering the biology of Mycobacterium tuberculosis from the complete genome sequence." Cole S.T., Brosch R., Parkhill J., Garnier T., Churcher C.M., Harris D.E., Gordon S.V., Eiglmeier K., Gas S., Barry C.E. III, Tekaia F., Badcock K., Basham D., Brown D., Chillingworth T., Connor R., Davies R.M., Devlin K. , Feltwell T., Gentles S., Hamlin N., Holroyd S., Hornsby T., Jagels K., Krogh A., McLean J., Moule S., Murphy L.D., Oliver S., Osborne J., Quail M.A., Rajandream M.A., Rogers J., Rutter S., Seeger K., Skelton S., Squares S., Squares R., Sulston J.E., Taylor K., Whitehead S., Barrell B.G. Nature 393:537-544(1998) [PubMed: 9634230] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC 25618 / H37Rv.
[2]	"Whole-genome comparison of Mycobacterium tuberculosis clinical and laboratory strains." Fleischmann R.D., Alland D., Eisen J.A., Carpenter L., White O., Peterson J.D., DeBoy R.T., Dodson R.J., Gwinn M.L., Haft D.H., Hickey E.K., Kolonay J.F., Nelson W.C., Umayam L.A., Ermolaeva M.D., Salzberg S.L., Delcher A., Utterback T.R. , Weidman J.F., Khouri H.M., Gill J., Mikula A., Bishai W., Jacobs W.R. Jr., Venter J.C., Fraser C.M. J. Bacteriol. 184:5479-5490(2002) [PubMed: 12218036] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: CDC 1551 / Oshkosh.
[3]	"Cloning, expression, purification and characterization of DNA topoisomerase I of Mycobacterium tuberculosis." Yang F.D., Lu G., Rubin H. Gene 178:63-69(1996) [PubMed: 8921893] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 1-895. Strain: ATCC 35801 / TMC 107 / Erdman.
+	Additional computationally mapped references.

Cross-references

Sequence databases
EMBLGenBankDDBJ	BX842583 Genomic DNA. Translation: CAB08843.1. AE000516 Genomic DNA. Translation: AAK48109.1. U40159 Genomic DNA. Translation: AAC44599.1.
PIR	G70563.
RefSeq	NP_218163.1. NP_338295.1.
3D structure databases
HSSP	HSSP built from PDB template 1ECL based on UniProtKB P06612.
ModBase	Search...
Genome annotation databases
GeneID	885608. 922741.
GenomeReviews	Gene locus MT3749 in contig AE000516_GR. Gene locus Rv3646c in contig AL123456_GR.
KEGG	mtc:MT3749. mtu:Rv3646c.
TIGR	MT3749.
Organism-specific databases
TubercuList	Rv3646c.
Phylogenomic databases
HOGENOM	P0A620.
OMA	TGQVVKF.
Enzyme and pathway databases
BRENDA	5.99.1.2. 809.
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_MYCTU

Accession

Primary (citable) accession number: P0A620
Secondary accession number(s): O08383, Q59567

Entry history

Integrated into UniProtKB/Swiss-Prot:	March 15, 2005
Last sequence update:	March 15, 2005
Last modified:	November 3, 2009
This is version 30 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)