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- W1993382008 abstract "An enzyme which catalyzes the addition of a single UMP residue from UTP to the 3'-end of an RNA primer and which is referred to as terminal uridylyl transferase (TUT) has been extensively purified from the membrane fraction of vigna unguiculata leaves. The purification procedure involved (i) solubilization by cation depletion (ii) DEAE-Sepharose CL-6B column chromatography (iii) affinity chromatography of poly(U)-Sepharose 4B and (iv) glycerol gradient centrifugation. The molecular weight of the native enzyme was approximately 50,000 as determined by velocity sedimentation. Under conditions that were optimal for UMP-incorporation (5 mM Mg2+, low salt, 30 degrees C) TUT displayed a marked specificity for UTP as substrate, was unable to incorporate deoxyribonucleoside triphosphates and required a single-stranded oligo- or polyribonucleotide as primer. When oligoA20, tRNAasp of E. coli or alfalfa mosaic virus RNA 4 were used as primers at various substrate to primer ratio's, the vast majority of the product appeared to consist of primer molecules elongated with a single UMP residue as shown by polyacrylamide gelelectrophoresis and nearest neighbour analysis. We believe TUT to be a novel enzyme which has not been reported before and which may be a feasible tool in RNA sequencing as it enables the specific 3'-terminal labeling of RNA molecules." @default.
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- W1993382008 date "1981-01-01" @default.
- W1993382008 modified "2023-10-13" @default.
- W1993382008 title "Terminal uridylyl transferase of Vigna unguiculata: purification and characterization of an enzyme catalyzing the addition of a single UMP residue to the 3′-end of an RNA primer" @default.
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- W1993382008 doi "https://doi.org/10.1093/nar/9.11.2433" @default.
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