Abstract
During transcription of protein coding genes by RNA Polymerase II the mRNA is processed and packaged into an mRNP. Among the proteins binding cotranscriptionally to the mRNP are mRNA export factors. One of the protein complexes thus coupling transcription to mRNA export is the TREX complex. However, despite the fact that TREX was identified and characterized about a decade ago, it had remained enigmatic how TREX is recruited to genes. The conserved Prp19 complex (Prp19C) has long been known for its function in splicing. We recently identified Prp19C to be essential for a second step in gene expression namely TREX occupancy at transcribed genes, answering this long-standing question but also raising new ones.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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DNA Repair
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DNA Repair Enzymes / metabolism*
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Exodeoxyribonucleases / metabolism*
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Humans
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Membrane Transport Proteins / metabolism
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Nuclear Proteins / metabolism*
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Nucleocytoplasmic Transport Proteins / metabolism
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RNA Polymerase II / metabolism
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RNA Splicing
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RNA Splicing Factors
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RNA, Messenger / metabolism*
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RNA-Binding Proteins / metabolism
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Saccharomyces cerevisiae / metabolism
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Saccharomyces cerevisiae Proteins / metabolism*
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Spliceosomes / metabolism*
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Transcription, Genetic
Substances
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MEX67 protein, S cerevisiae
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Membrane Transport Proteins
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Mtr2 protein, S cerevisiae
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Nuclear Proteins
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Nucleocytoplasmic Transport Proteins
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PRP19 protein, S cerevisiae
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RNA Splicing Factors
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RNA, Messenger
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RNA-Binding Proteins
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Saccharomyces cerevisiae Proteins
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RNA Polymerase II
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Exodeoxyribonucleases
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DNA Repair Enzymes
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PRPF19 protein, human