| Class a: All alpha proteins [46456] (289 folds) | 
| Fold a.256: RUN domain-like [140740] (1 superfamily) multihelical; 3-helical bundle similar to one half of the DEATH domain fold is flanked by two alpha-hairpins forming a four-helical bundle; the axes of the three-helical and four-helical bundles are aproximately orthogonal to each other  | 
Superfamily a.256.1: RUN domain-like [140741] (1 family) ![]()  | 
| Family a.256.1.1: RUN domain [140742] (2 proteins) Pfam PF02759  | 
| Protein Rap2 interacting protein X (RUFY3) [140743] (1 species) | 
| Mouse (Mus musculus) [TaxId:10090] [140744] (2 PDB entries) Uniprot Q9D394 65-231  | 
| Domain d2cxfa1: 2cxf A:83-249 [131004] | 
| Domain d2cxla1: 2cxl A:83-247 [131011] automatically matched to 2CXF A:83-249  | 
Timeline for Protein Rap2 interacting protein X (RUFY3) from a.256.1.1: RUN domain: