Product Description
LZCap GG (3'Acm) is a cap1 analog. The product is used for transcription with the initial sequence of 5'GG3', and the natural cap1 structure is produced by Cap1 transcription capping. US patent approved.
Components
Figures
below, the SP6 promoter (underlined) followed by the GG sequence can ef fectively initiate transcription.
Protocol
1. Thaw components required for the experim ent on ice. 2. Add RNase free water and NTPs to reaction tube. 3. Heat LZCap GG(3'Acm) aliquot for 15 min at 60°C. Cool at room temperature for 5 min. 4. Immediately add LZCap GG(3'Acm) to tube and vortex to mix. Spin briefly to collect liquid. 5. Add 10x Transcription Buffer and vortex. 6. Add DNA template a nd SP6 Enzyme Mix. 7. Mix the prepared reaction solution, spin briefly, and incubate at 37°C for 2-3 hours. If the transcript length is less than 100nt, increase the reaction time to 4-8 h.
Components
Notes
1) The SP6 enzyme mix we recommended to used is MEGAscri pt ® Kit(AM1330). 2) LZCap GG(3'Acm) is suitable for SP6 promoter transcription vector with 5 ‘GG 3’initiated sequences, which needs to be considered when constructing the vector. 3) The reagents, consumables and containers used in the experiment are free o f RNase contamination. 4) It is recommended to use a linearized DNA temp late for transcription. 5) When modified nucleotides were used in place of wild-type nucleotides, the final concentra tion of the reaction was unchanged. 6) Modified N1-Me-pUTP can be used in place of wild-type UTP. The mod ified N1-Me-pUTP reduces the immunogenicity of mRNA. Henovcom can also provide modified nucleotide N1-Me-pUTP (Cat. No.: HN1002). 7) If the PCR pro duct is used as the transcription initiation DNA template, the amount of DNA template can be reduced by half.
Storage
This product could be stored at -25~-15 ℃ for two years.
Precautions
For your safety and health, please wear personal protective equipment (PPE), such as laboratory coats and disposable gloves, when operating with this product. For research use only. F&Q 1. How do you design the LZCap? Enzymes have a relatively "specific" recognition of substrates. Therefore, when designing a new cap structure, on one hand, we need novel structural modifications for patent purposes, but on the other hand, we strive to maintain similarity with natural/known structures as much as possible. The natural structure has a ribose 3' OH, which can be modified (e.g., methylation). Based on this consideration, we chose to add a carbon at the 3' position for patent novelty, followed by an NH to mimic the hydrogen bonding of OH, and then an acetyl group to reduce the basicity of NH and enhance its hydrogen bonding capability. The activity of LzCap is better than methylat ed natural cap
, possibly due to increased hydrogen bonding. Compared to the methyl and methoxy groups, the acetyl amino group may also increase van der Waals interactions between the substrate (cap) and the initiating factor (enzyme). 2. Is the acetyl amino group stable? The acetyl amino group is already sufficiently stable. It is much more stable than the 7-methylated position and the phosphodiester bond, which are the least stable parts of the cap. Please contact us for more details about the LZCap licensing.