CTDSP1, Recombinant, Human, aa1-260, His-Tag (Carboxy-terminal Domain RNA Polymerase II Polypeptide A Small Phosphatase 1, Nuclear LIM Interactor-interacting Factor 3, NLI-interacting Factor 3, NLI-IF, NIF3, NLIIF)
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.
Source
Recombinant, E. coli
Form
Supplied as a liquid in 20mM Tris-HCl buffer, pH 8.0, 1mM DTT, 0.1M sodium chloride, 20% glycerol.
Important Note
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.
