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2GAI

Structure of Full Length Topoisomerase I from Thermotoga maritima in triclinic crystal form

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
A0007059biological_processchromosome segregation
A0008270molecular_functionzinc ion binding
A0016853molecular_functionisomerase activity
A0046872molecular_functionmetal ion binding
A0140226molecular_functionRNA topoisomerase activity
B0003677molecular_functionDNA binding
B0003916molecular_functionDNA topoisomerase activity
B0003917molecular_functionDNA topoisomerase type I (single strand cut, ATP-independent) activity
B0006265biological_processDNA topological change
B0007059biological_processchromosome segregation
B0008270molecular_functionzinc ion binding
B0016853molecular_functionisomerase activity
B0046872molecular_functionmetal ion binding
B0140226molecular_functionRNA topoisomerase activity
Functional Information from PROSITE/UniProt
site_idPS00396
Number of Residues23
DetailsTOPO_IA_1 Topoisomerase (Topo) IA-type active site signature. QqLYEgvetkdghiaf.ITYmRTD
ChainResidueDetails
AGLN270-ASP292

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues42
DetailsZinc finger: {"description":"C4-type"}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues10
DetailsRegion: {"description":"Interaction with DNA","evidences":[{"source":"HAMAP-Rule","id":"MF_00952","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues2
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 Residues4
DetailsBinding site: {"evidences":[{"source":"HAMAP-Rule","id":"MF_00952","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues16
DetailsSite: {"description":"Interaction with DNA","evidences":[{"source":"HAMAP-Rule","id":"MF_00952","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues4
DetailsAnnotated By Reference To The Literature 1ecl
ChainResidueDetails
AHIS334
AASP84
ATYR288
AGLU12

site_idCSA2
Number of Residues4
DetailsAnnotated By Reference To The Literature 1ecl
ChainResidueDetails
BHIS334
BASP84
BTYR288
BGLU12

243531

PDB entries from 2025-10-22

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