Serine/arginine (SR)-type shuttling mRNA binding protein GBP2

UniProtKB accession:  P25555

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UniProtKB description:  Binds to intron-containing transcripts and is involved in quality control for the export of spliced mRNAs from the nucleus (PubMed:14769921, PubMed:24452287). Binds to pre-mRNAs until splicing is completed or until faulty mRNAs are degraded. On correctly spliced mRNAs, GBP2 and HRB1 recruit MEX67 to allow nuclear export. On faulty mRNAs, GBP2 and HRB1 associate with the TRAMP complex that guides those pre-mRNAs to the exosome for degradation (PubMed:24452287). Binds single-stranded telomeric sequences of the type (TG[1-3])n in vitro (PubMed:7800479). Influences the localization of RAP1 in the nuclei (PubMed:7777547). Involved in modulating telomere length (PubMed:12519786).