Active Site

Structures: DNA topoisomerase I, active site (IPR018521)


The Protein Data Bank (PDB) is a repository for the 3-D structural data of large biological molecules, such as proteins and nucleic acids.

1k4t  1a41  1rrj  1seu  1sc7  1rr8  1tl8  1t8i  1k4s  1r49  1a36  1a35  1ej9  1a31  1lpq  1nh3 


CATH is a hierarchical classification of protein model structures. 


The Structural Classification of Proteins (SCOP) database is a largely manual classification of protein structural domains based on similarities of their amino acid sequences and three-dimensional structures.

d.163.1.2  a.2.8.1