Is predicted to encode a protein with the following domains: Heat shock chaperonin-binding; Tetratricopeptide repeat; Tetratricopeptide repeat 1; TPR repeat; STI1 domain; and Tetratricopeptide-like helical domain superfamily. Is an ortholog of C. elegans sti-1. In C. elegans, sti-1 is involved in determination of adult lifespan; reproduction; and response to heat.