EKC/KEOPS complex subunit TPRKB (TPRKB)

Component of the EKC/KEOPS complex that is necessary for the creation of a threonylcarbamoyl set on adenosine at position 37 (t(6)A37) in tRNAs that read codons starting with adenine (PubMed:22912744, PubMed:28805828). The complex is probably involved in the transport of this threonylcarbamoyl moiety of threonylcarbamoyl-AMP (TC-AMP) to the N6 set of A37 (PubMed:22912744, PubMed:28805828).

TPRKB acts as an allosteric effector that modulates the t(6)A activity of the complex. TPRKB is not required for tRNA modification (PubMed:22912744, PubMed:28805828).