| Modification Notes |
WD-repeats are motifs that are found in a variety of proteins and are characterized by a conserved core of 40-60 amino acids, which commonly form a tertiary propeller structure. While proteins that contain WD-repeats participate in a wide range of cellular functions, they are generally involved in regulatory mechanisms involving signal transduction, apoptosis, transcriptional regulation, cell cycle control. WD repeats serve as sites for protein-protein interaction and some seem to mediate the assembly of protein complexes. With 9 WD repeats, WDR7 (WD repeat-containing protein 7), also known as TGF-beta resistance-associated protein (TRAG) and Rabconnectin-3 beta, is a 1490 amino acid protein that is abundantly expressed in brain and colocalizes with rabconnectin-3 on synaptic vesicles. Unlike rabconnectin-3, WDR7 binds directly to Rab3 GDP/GTP exchange protein and may therefore play a role in cell proliferation and survival. There are two isoforms of WDR7 that are produced as a result of alternative splicing events. |