Domain

Structures: NAC domain (IPR003441)

PDBe

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

3ulx  4dul  1ut4  1ut7 

CATH

CATH is a hierarchical classification of protein model structures.

3.30.310.150 

SCOP

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.

b.143.1.1