Rabenosyn-5 (Rbsn) is a multivalent effector with interacts with the Rab family.Rsbn contains distinct Rab4 and Rab5 binding sites within residues 264-500 and 627-784 respectively [1]. Rab proteins are GTPases involved in the regulation of all stages of membrane trafficking [1].

1: Structural basis of family-wide Rab GTPase recognition by rabenosyn-5. Eathiraj S, Pan X, Ritacco C, Lambright DG; Nature. 2005;436:415-419. PMID:16034420