Polynucleotide kinase that can phosphorylate the 5-hydroxyl groups of double-stranded RNA (dsRNA), single-stranded RNA (ssRNA), double stranded DNA (dsDNA) and double-stranded DNA:RNA hybrids. dsRNA is phosphorylated more efficiently than dsDNA, and the RNA component of a DNA:RNA hybrid is phosphorylated more efficiently than the DNA component. Plays a role in both tRNA splicing and mRNA 3-end formation. Component of the tRNA splicing endonuclease complex: phosphorylates the 5-terminus of the tRNA 3-exon during tRNA splicing, this phosphorylation event is a prerequisite for the subsequent ligation of the two exon halves and the production of a mature tRNA. Its role in tRNA splicing and maturation is required for cerebellar development. Component of the pre-mRNA cleavage complex II (CF-II), which seems to be required for mRNA 3-end formation. Also phosphorylates the 5-terminus of exogenously introduced short interfering RNAs (siRNAs), which is a necessary prerequisite for their incorporation into the RNA-induced silencing complex (RISC). However, endogenous siRNAs and microRNAs (miRNAs) that are produced by the cleavage of dsRNA precursors by dicer1 already contain a 5-phosphate group, so this protein may be dispensible for normal RNA-mediated gene silencing. Source: Recombinant protein corresponding to aa1-439 from Xenopus laevis Polyribonucleotide 5-hydroxyl-kinase Clp1, fused to 6X His-Tag at N-terminal, expressed in E.coli. Molecular Weight: ~54.3kD Amino Acid Sequence: MSSEDLSAPGPSAPDSSWSSTGPSTKFELERETELRLEVEGTDPVRVELVSGLAEVFGTELTRNKKYTFPPGSRAAIFTWHGCTVQLWGSPDMAYVSRDTPMLLYLNTQVGLEQMRVQAEREGERGPRVLVAGPSDVGKSTLCRLLLNYAVRRGRRPTLVELDVGQGSVSVPGTMGALCVERPADVEEGFSAQAPLVYHFGSTTPGTNIKLYNKLTSRLAHVFNLRCDSNRRASVSGCLINTCGWVKGSGYQALIHAASAFEVDVVLVLDQERLYNDLLRDLPHFVRTLLLPKSGGASERSKECRRESRDQRVREYFYGPRGSLYPHAFEIKFSEVRVYKVGAPTIPDSCLPLGMSQEDNQLKLVPVTPGRDMAHHLLSVVPLDGGSAEEGIEERSVAGFIVITGVDTERQTLTLLSPAPRPLPKCVLLIMDIRFMDLK Storage and Stability: Lyophilized and reconstituted products are stable for 6 months after receipt at -20C. Reconstitute with sterile ddH2O. Aliquot to avoid repeated freezing and thawing. Store at -20C. 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.
Supplied as a lyophilized powder from 20mM Tris-HCl, 0.5M sodium chloride, pH 8.0, 6% trehalose. Reconstitute with sterile ddH2O to a concentration of 0.1-1mg/ml.
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