The function of TCF25 (TCF25 ribosome quality control complex subunit, ENSG00000141002) is as follows. Component of the ribosome quality control complex (RQC), a ribosome-associated complex that mediates ubiquitination and extraction of incompletely synthesized nascent chains for proteasomal degradation (PubMed:30244831). In the RQC complex, required to promote formation of 'Lys-48'-linked polyubiquitin chains during ubiquitination of incompletely synthesized proteins by LTN1 (PubMed:30244831). May negatively regulate the calcineurin-NFAT signaling cascade by suppressing the activity of transcription factor NFATC4 (By similarity). May play a role in cell death control (By similarity). {ECO:0000250|UniProtKB:A0A8I6ASZ5, ECO:0000250|UniProtKB:Q8R3L2, ECO:0000269|PubMed:30244831}.