The THO complex plays a role in coupling transcription elongation to mRNA export. It is composed of subunits THP2, HPR1, THO2 and MFT1 [1].

1: A protein complex containing Tho2, Hpr1, Mft1 and a novel protein, Thp2, connects transcription elongation with mitotic recombination in Saccharomyces cerevisiae. Chavez S, Beilharz T, Rondon AG, Erdjument-Bromage H, Tempst P, Svejstrup JQ, Lithgow T, Aguilera A; EMBO J. 2000;19:5824-5834. PMID:11060033

2: The yeast THO complex and mRNA export factors link RNA metabolism with transcription and genome instability. Jimeno S, Rondon AG, Luna R, Aguilera A; EMBO J. 2002;21:3526-3535. PMID:12093753