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6CQI

2.42A Crystal structure of Mycobacterium tuberculosis Topoisomerase I in complex with an oligonucleotide MTS2-11

Functional Information from GO Data
ChainGOidnamespacecontents
A0003677molecular_functionDNA binding
A0003916molecular_functionDNA topoisomerase activity
A0003917molecular_functionDNA topoisomerase type I (single strand cut, ATP-independent) activity
A0006265biological_processDNA topological change
Functional Information from PDB Data
site_idAC1
Number of Residues3
Detailsbinding site for residue FMT A 801
ChainResidue
AASP51
ALEU52
AARG54

site_idAC2
Number of Residues4
Detailsbinding site for residue FMT A 802
ChainResidue
AHIS48
AARG50
AASP51
AGLN164

site_idAC3
Number of Residues6
Detailsbinding site for residue GOL A 803
ChainResidue
ATRP603
APHE607
ASER618
AVAL619
AARG576
APHE582

site_idAC4
Number of Residues4
Detailsbinding site for residue ACT A 804
ChainResidue
AARG50
ATYR83
ATRP121
AGLU125

site_idAC5
Number of Residues2
Detailsbinding site for residue ACT A 805
ChainResidue
AASP76
ALYS626

site_idAC6
Number of Residues2
Detailsbinding site for residue ACT A 806
ChainResidue
ASER317
ALYS552

Functional Information from PROSITE/UniProt
site_idPS00396
Number of Residues15
DetailsTOPO_IA_1 Topoisomerase (Topo) IA-type active site signature. QrLYEngy.........ITYmRTD
ChainResidueDetails
AGLN332-ASP346

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues124
DetailsDomain: {"description":"Toprim","evidences":[{"source":"HAMAP-Rule","id":"MF_00952","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues5
DetailsRegion: {"description":"Interaction with DNA","evidences":[{"source":"HAMAP-Rule","id":"MF_00952","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues1
DetailsActive site: {"description":"O-(5'-phospho-DNA)-tyrosine intermediate","evidences":[{"source":"PROSITE-ProRule","id":"PRU01383","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues2
DetailsBinding site: {"evidences":[{"source":"HAMAP-Rule","id":"MF_00952","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues8
DetailsSite: {"description":"Interaction with DNA","evidences":[{"source":"HAMAP-Rule","id":"MF_00952","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

240971

PDB entries from 2025-08-27

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