Sel1-like repeats are tetratricopeptide repeat sequences originally identified in a Caenorhabditis elegans receptor molecule which is a key negative regulator of the Notch pathway [1]. Mammalian homologues have since been identified although these mainly pancreatic proteins have yet to have a function assigned.
Luthy L, Grutter MG, Mittl PR.
The crystal structure of Helicobacter cysteine-rich protein C at 2.0 A resolution: similar peptide-binding sites in TPR and SEL1-like repeat proteins.
J. Mol. Biol. 340 2004 829-41
[PubMed: 15223324] http://dx.doi.org/10.1016/j.jmb.2004.04.055
Luthy L, Grutter MG, Mittl PR.
The crystal structure of Helicobacter pylori cysteine-rich protein B reveals a novel fold for a penicillin-binding protein.
J. Biol. Chem. 277 2002 10187-93
[PubMed: 11777911] http://dx.doi.org/10.1074/jbc.M108993200