CTDSP1, Recombinant, Human, aa1-260, His-tag (Carboxy-terminal Domain RNA Polymerase II Polypeptide

Carboxy-terminal domain, RNA polymerase II, polypeptide A phosphatase 1, also known as CTDSP1, is a class 2C phosphatase with activity dependent on the conserved DxD motif. CTDSP1 preferentially catalyzes the dephosphorylation of 'Ser-5' within the tandem 7 residues repeats in the C-terminal domain (CTD) of the largest RNA polymerase II subunit POLR2A. Also it negatively regulates RNA polymerase II transcription, possibly by controlling the transition from initiation/capping to processive transcript elongation. Source: Recombinant corresponding to aa1-260 from human CTDSP1, fused to His-tag at N-terminus expressed in E.coli. AA Sequence: MGSSHHHHHH SSGLVPRGSH MDSSAVITQI SKEEARGPLR GKGDQKSAAS QKPRSRGILH SLFCCVCRDD GEALPAHSGA PLLVEENGAI PKTPVQYLLP EAKAQDSDKI CVVIDLDETL HSSFKPVNN ADFIIPVEID GVVHQVYVLK RPHVDEFLQR MGELFECVLF TASLAKYADP VADLLDKWGA FRARLFRESC VFHRGNYVKD LSRLGRDLRR VLILDNSPAS YVFHPDNAVP VASWFDNMSD TELHDLLPFF EQLSRVDDVY SVLRQPRPGS, Molecular Weight: ~31.2kD (280aa), confirmed by MALDI-TOF, Enzyme Activity: Not determined. This product is recommended for use in applications that do not require a catalytically active form of the protein. Storage and Stability: May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for at least 6 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.