Thermo Fisher Scientific POLR2A Polyclonal Antibody

Applications and Tested Dilution

Product Specifications

Product Specific Information

This antibody detects endogenous levels of total POLR2A.

Target Information

DNA-directed RNA polymerase II subunit RPB1 (POLR2A) is a DNA-dependent RNA polymerase that catalyzes the transcription of DNA into RNA using ribonucleoside triphosphates as substrates. POLR2A is the largest subunit and a catalytic component of RNA polymerase II, responsible for synthesizing mRNA precursors and many functional non-coding RNAs.

It forms the polymerase active center together with the second largest subunit. Pol II is the central component of the basal RNA polymerase II transcription machinery, composed of mobile elements that move relative to each other. RPB1 is part of the core element with the central large cleft, the clamp element that opens and closes the cleft, and the jaws that grab the incoming DNA template.

At the start of transcription, a single-stranded DNA template strand of the promoter is positioned within the central active site cleft of Pol II. A bridging helix emanates from RPB1 and crosses the cleft near the catalytic site, promoting translocation of Pol II by acting as a ratchet that moves the RNA-DNA hybrid through the active site by switching from straight to bent conformations during nucleotide addition. Transcription elongation is influenced by the phosphorylation status of the C-terminal domain (CTD) of Pol II’s largest subunit (RPB1), which serves as a platform for assembly of factors regulating transcription initiation, elongation, termination, and mRNA processing.

Regulation of gene expression depends on the balance between methylation and acetylation levels of CTD-lysines.

For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.