Can Vaccinia Capping Enzyme Work on Short RNAs?
Can Vaccinia Capping Enzyme Work on Short RNAs? Experimental Insights and Cleanup Strategies for 15nt–27nt Transcripts Experimental Insights and Cleanup Strategies for 15nt–27nt Transcripts When working with synthetic or transcribed RNAs, one common question arises: can very short RNA molecules—like 15 to 27 nucleotides—be efficiently capped using Vaccinia Capping Enzyme ? Although the literature and most protocols mention a minimum of 25nt, recent data and internal experiments suggest there’s more flexibility than previously thought. What’s the Minimum Length Required for Vaccinia Capping Enzyme? Traditionally, it's accepted that at least 25nt of RNA is needed for the enzyme to bind effectively and catalyze the addition of a 5′ cap ( Luo & Shuman, 1993 ). NEB’s internal tests, however, showed successful capping of 27mer RNAs , and even some 23nt RNAs in published studies reacted successfully. Th...