THOC7
Function
Component of the THO subcomplex of the TREX complex which is thought to couple mRNA transcription, processing and nuclear export, and which specifically associates with spliced mRNA and not with unspliced pre-mRNA (PubMed:15833825, PubMed:15998806, PubMed:17190602). Required for efficient export of polyadenylated RNA (PubMed:23222130). Plays a key structural role in the oligomerization of the THO-DDX39B complex (PubMed:33191911). TREX is recruited to spliced mRNAs by a transcription-independent mechanism, binds to mRNA upstream of the exon-junction complex (EJC) and is recruited in a splicing- and cap-dependent manner to a region near the 5' end of the mRNA where it functions in mRNA export to the cytoplasm via the TAP/NXF1 pathway (PubMed:15833825, PubMed:15998806, PubMed:17190602).
(Microbial infection) The TREX complex is essential for the export of Kaposi's sarcoma-associated herpesvirus (KSHV) intronless mRNAs and infectious virus production.
Sequence Similarities
Belongs to the THOC7 family.
Cellular localization
- Cytoplasm
- Nucleus
- Nucleus speckle
- Interaction with THOC5 is required for nuclear localization.
Alternative names
NIF3L1BP1, THOC7, THO complex subunit 7, Functional spliceosome-associated protein 24, Ngg1-interacting factor 3-like protein 1-binding protein 1, hTREX30, fSAP24, NIF3L1-binding protein 1