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1A41

TYPE 1-TOPOISOMERASE CATALYTIC FRAGMENT FROM VACCINIA VIRUS

Functional Information from GO Data
ChainGOidnamespacecontents
A0003677molecular_functionDNA binding
A0003917molecular_functionDNA topoisomerase type I (single strand cut, ATP-independent) activity
A0006265biological_processDNA topological change
Functional Information from PDB Data
site_idAC1
Number of Residues5
DetailsBINDING SITE FOR RESIDUE SO4 A 1
ChainResidue
AARG84
ALYS257
ASER268
ASER270
ALYS271

Functional Information from PROSITE/UniProt
site_idPS00176
Number of Residues19
DetailsTOPO_IB_1 Topoisomerase (Topo) IB-type active site signature. EvvghtpSISKraYMattI
ChainResidueDetails
AGLU261-ILE279

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues1
DetailsACT_SITE: O-(3'-phospho-DNA)-tyrosine intermediate => ECO:0000255|PROSITE-ProRule:PRU01382, ECO:0000255|PROSITE-ProRule:PRU10130, ECO:0000269|PubMed:15755148
ChainResidueDetails
ATYR274

site_idSWS_FT_FI2
Number of Residues1
DetailsSITE: Involved in religation => ECO:0000250|UniProtKB:P32989
ChainResidueDetails
AASP168

Catalytic Information from CSA
site_idMCSA1
Number of Residues5
DetailsM-CSA 232
ChainResidueDetails
AARG130attractive charge-charge interaction, electrostatic stabiliser, hydrogen bond donor, proton acceptor, proton donor, proton relay
ALYS167attractive charge-charge interaction, electrostatic stabiliser, hydrogen bond donor, proton acceptor, proton donor, proton relay
AARG223attractive charge-charge interaction, electrostatic stabiliser, hydrogen bond donor
AHIS265electrostatic stabiliser, hydrogen bond donor
ATYR274hydrogen bond acceptor, hydrogen bond donor, nucleofuge, nucleophile, proton acceptor, proton donor

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PDB entries from 2024-04-24

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