Is predicted to encode a protein with the following domains: STI1 domain; Tetratricopeptide-like helical domain superfamily; Heat shock chaperonin-binding; TPR repeat; Tetratricopeptide repeat; and Tetratricopeptide repeat 1. 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.