The C.elegans Notch pathway, involved in the control of growth, differentiation and patterning in animal development, relies on either of the receptors GLP-1 or LIN-12 [1]. Both these receptors promote signalling by the recruitment of LAG-3 to target promoters, where it then acts as a transcriptional activator. LAG-3 works as a ternary complex together with the DNA binding protein, LAG-1 [1,2]. Its N-terminal region adopts an elongated kinked helix that is required for complex assembly [2].

1: LAG-3 is a putative transcriptional activator in the C. elegans Notch pathway. Petcherski AG, Kimble J; Nature. 2000;405:364-368. PMID:10830967

2: Crystal structure of the CSL-Notch-Mastermind ternary complex bound to DNA. Wilson JJ, Kovall RA; Cell. 2006;124:985-996. PMID:16530045