Human GTF2F1 knockout HEK-293T cell lysate

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GTF2F1 also known as General Transcription Factor IIF Subunit 1 plays an important role in transcription initiation. It weighs around 55 kDa and is expressed in various cell types across human tissues. GTF2F1 acts as a part of the transcription preinitiation complex that interacts with RNA polymerase II. This protein consists of distinct domains that mediate its role in facilitating the recruitment of RNA polymerase II to specific gene promoters.

Biological function summary

The General Transcription Factor IIF Subunit 1 (GTF2F1) functions as part of the transcription machinery specifically as a component of the transcription factor IIF (TFIIF) complex. It contributes to the stabilization and proper function of RNA polymerase II during transcription initiation and reinitiation. The TFIIF complex includes other subunits such as GTF2F2 that work together to manage transcription accuracy and processivity. This complex binds to DNA and RNA polymerase II impacting how transcription is executed across the genome.

Pathways

GTF2F1 participates in the RNA polymerase II transcription initiation pathway which is central to the synthesis of mRNA from DNA templates. This pathway involves several other general transcription factors like TFIID. GTF2F1 also influences the positive transcription elongation factor b (P-TEFb) pathway which helps regulate transcription elongation by phosphorylating the RNA polymerase II C-terminal domain. Through these pathways GTF2F1 indirectly associates with numerous gene expression regulatory mechanisms.

Abnormal function or expression of GTF2F1 connects to cancer and neurodegenerative diseases. In cancer dysregulation in transcription may lead to uncontrolled cell proliferation. Other proteins such as TFIID and TFIIB also interact within this context affecting the transcription regulatory landscape. In neurodegenerative diseases disrupted gene expression involving GTF2F1 and its associated complexes may contribute to disease progression linking transcription inaccuracies to cell dysfunction and death.