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Class I topoisomerase

PDB ID: 1A36

Class I topoisomerases bind to DNA and release tension caused by winding or unwinding of the double helix. This structure includes the enzyme and a short piece of DNA captured before the cleavage reaction that relaxes the DNA.

Read the Molecule of the Month article on Topoisomerases .
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Length: 22
Type:
dna
Length: 22
Type:
dna
Length: 591
Type:
protein
 
 
 
 

Reference

PDB ID: 1A36 , Pubmed

A model for the mechanism of human topoisomerase I.

Stewart, L., Redinbo, M.R., Qiu, X., Hol, W.G., Champoux, J.J.

Journal: (1998) Science 279: 1534-1541


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