This protein plays a regulatory role in both positive and negative T cell selection during late thymocyte development. The protein functions through T-cell antigen receptor signaling, and is necessary for proper lineage commitment and maturation of T-cells.[8] Changes in THEMIS gene expression due to the rs138300818 variant promote the development of early-onset type 1 diabetes.[9]
THEMIS is an acronym for thymocyte-expressed molecule involved in selection. Themis is also the name of a Titan in Greek mythology who weighed the fates of humans, an apt choice since the protein is important in deciding the fate of the T cell during development.[10]
Harrington JJ, Sherf B, Rundlett S, Jackson PD, Perry R, Cain S, et al. (May 2001). "Creation of genome-wide protein expression libraries using random activation of gene expression". Nature Biotechnology. 19 (5): 440–445. doi:10.1038/88107. PMID11329013. S2CID25064683.