This domain is found in the Telomerase protein component 1 (TEP1) and it contains an homology region to the telomerase associated protein from Tetrahymena p80 [1]. TEP1 is a component of the telomerase ribonucleoprotein complex and is thought to be responsible for catalysing the addition of new telomeres to chromosomes. TEP1 is also a component of the vault particle, a cytoplasmic ribonucleoprotein complex, in which it is required for vault RNA stability and its association with the vault particle [2]. This domain is localised between the TROVE (Pfam:PF05731) and DUF4062 (Pfam:PF13271) domains.

1: A mammalian telomerase-associated protein. Harrington L, McPhail T, Mar V, Zhou W, Oulton R, Bass MB, Arruda I, Robinson MO; Science. 1997;275:973-977. PMID:9020079

2: The Telomerase/vault-associated protein TEP1 is required for vault RNA stability and its association with the vault particle. Kickhoefer VA, Liu Y, Kong LB, Snow BE, Stewart PL, Harrington L, Rome LH; J Cell Biol. 2001;152:157-164. PMID:11149928