Rabbit POLR2A Polyclonal Antibody | anti-POLR2A antibody

POLR2A Antibody

Cat. Num. AAA307659

• Gene Names: POLR2A; RPB1; RPO2; POLR2; POLRA; RPBh1; RPOL2; RpIILS; hsRPB1; hRPB220
• Reactivity: Human, Mouse, Rat
• Applications: Immunofluorescence, Immunohistochemistry, Western Blot
• Purity: Antibodies were purified by affinity purification using immunogen.
• Synonyms: POLR2A, Antibody; POLR2A Antibody; RPB1; RPO2; POLR2; POLRA; RPBh1; anti-POLR2A antibody

• Host: Rabbit
• Reactivity: Human, Mouse, Rat
• Clonality: Polyclonal
• Specificity: The antibody detects endogenous level of total POLR2A protein.
• Purity/Purification: Antibodies were purified by affinity purification using immunogen.
• Form/Format: Supplied at 1.0mg/mL in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
• Concentration: 1.0 mg/ml (varies by lot)
• Sequence Length: 1970

• Applicable Applications for anti-POLR2A antibody: IF (Immunofluorescence), IHC (Immunohistochemistry), WB (Western Blot)
• Immunogen Type: Recombinant Protein
• Immunogen Description: Recombinant protein of human POLR2A.
• Target Name: POLR2A
• Preparation and Storage: Store at -20 degree C

IF (Immunofluorescence)

(Immunofluorescence analysis of HepG2 cell using POLR2A antibody. Blue: DAPI for nuclear staining.)

WB (Western Blot)

(Western blot analysis of extracts of HeLa cell lines, using POLR2A antibody.)

Related Product Information for anti-POLR2A antibody

RNA polymerase II (RNAPII) is a large multi-protein complex that functions as a DNA-dependent RNA polymerase, catalyzing the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates (1). The largest subunit, RNAPII subunit B1 (Rpb1), also known as RNAPII subunit A (POLR2A), contains a unique heptapeptide sequence (Tyr1,Ser2,Pro3,Thr4,Ser5,Pro6,Ser7), which is repeated up to 52 times in the carboxy-terminal domain (CTD) of the protein (1). This CTD heptapeptide repeat is subject to multiple post-translational modifications, which dictate the functional state of the polymerase complex. Phosphorylation of the CTD during the active transcription cycle integrates transcription with chromatin remodeling and nascent RNA processing by regulating the recruitment of chromatin modifying enzymes and RNA processing proteins to the transcribed gene (1). During transcription initiation, RNAPII contains a hypophosphorylated CTD and is recruited to gene promoters through interactions with DNA-bound transcription factors and the Mediator complex (1). The escape of RNAPII from gene promoters requires phosphorylation at Ser5 by CDK7, the catalytic subunit of transcription factor IIH (TFIIH) (2). Phosphorylation at Ser5 mediates the recruitment of RNA capping enzymes, in addition to histone H3 Lys4 methyltransferases, which function to regulate transcription initiation and chromatin structure (3,4). After promoter escape, RNAPII proceeds down the gene to an intrinsic pause site, where it is halted by the negative elongation factors NELF and DSIF (5). At this point, RNAPII is unstable and frequently aborts transcription and dissociates from the gene. Productive transcription elongation requires phosphorylation at Ser2 by CDK9, the catalytic subunit of the positive transcription elongation factor P-TEFb (6). Phosphorylation at Ser2 creates a stable transcription elongation complex and facilitates recruitment of RNA splicing and polyadenylation factors, in addition to histone H3 Lys36 methyltransferases, which function to promote elongation-compatible chromatin (7,8).

Product Categories/Family for anti-POLR2A antibody

Total protein Ab

NCBI and Uniprot Product Information

• NCBI GI #: 4505939
• NCBI GeneID: 5430
• NCBI Accession #: NP_000928.1
• NCBI GenBank Nucleotide #: NM_000937.4
• UniProt Accession #: P24928; Q6NX41; A6NN93; B9EH88
• Molecular Weight: 63,641 Da
• NCBI Official Full Name: DNA-directed RNA polymerase II subunit RPB1
• NCBI Official Synonym Full Names: polymerase (RNA) II (DNA directed) polypeptide A, 220kDa
• NCBI Official Symbol: POLR2A
• NCBI Official Synonym Symbols: RPB1; RPO2; POLR2; POLRA; RPBh1; RPOL2; RpIILS; hsRPB1; hRPB220
• NCBI Protein Information: DNA-directed RNA polymerase II subunit RPB1
• UniProt Protein Name: DNA-directed RNA polymerase II subunit RPB1
• UniProt Gene Name: POLR2A
• UniProt Synonym Gene Names: POLR2; RNA polymerase II subunit B1
• UniProt Entry Name: RPB1_HUMAN