RNA Removal Remains a Critical Step in Molecular Biology
RNA contamination can interfere with many downstream molecular biology workflows, including genomic DNA isolation, plasmid purification, PCR, sequencing, and protein purification. Removing RNA efficiently is therefore an essential step for obtaining high-quality DNA samples and ensuring reliable experimental results.
Among the many ribonucleases discovered in nature, RNase A remains one of the most widely used enzymes due to its exceptional stability, broad reaction conditions, and highly efficient degradation of single-stranded RNA (ssRNA).
Traditionally, RNase A has been isolated from bovine pancreas, a source that has supported molecular biology research for decades. However, as research workflows become increasingly standardized—and especially in regulated or sensitive applications—animal-derived enzymes present several limitations, including batch-to-batch variability, trace biological contaminants, and animal-origin concerns.
Recombinant expression provides a cleaner, more consistent alternative.
What Is Recombinant RNase A?
Yeasen Recombinant RNase A (Cat#10418ES) is produced through recombinant yeast expression, followed by highly controlled purification. Unlike conventionally purified bovine pancreatic RNase A, this recombinant enzyme is manufactured without animal-derived materials while maintaining comparable RNA digestion performance.
RNase A specifically hydrolyzes phosphodiester bonds adjacent to pyrimidine nucleotides (cytosine and uracil), making it highly effective for degrading single-stranded RNA while leaving DNA intact.
Because the enzyme is recombinant, it also minimizes the risk of unwanted contaminants commonly associated with biological tissue extraction.
Why Choose Recombinant RNase A?
Compared with conventional animal-derived RNase A, recombinant production offers several important advantages.
|
Feature |
Yeasen Recombinant RNase A |
|
Expression System |
Recombinant yeast |
|
Animal-Origin Components |
None |
|
Residual DNA/RNA |
None detected |
|
DNase Contamination |
None detected |
|
Protease Contamination |
None detected |
|
Recommended Working Concentration |
10–20 μg/mL |
|
Target Substrate |
Single-stranded RNA |
Key benefits include:
- Animal-origin free, reducing concerns associated with tissue-derived enzymes
- No detectable DNase, protease, or nucleic acid contamination
- Efficient and specific degradation of single-stranded RNA
- Compatible with a wide range of molecular biology reaction systems
- Excellent lot-to-lot consistency through recombinant manufacturing
Performance Validation
- Comparable RNA Digestion Efficiency
To evaluate digestion performance, 500 ng of standard RNA was treated with either bovine pancreatic RNase A or Yeasen Recombinant RNase A (1 μg enzyme).
Following a 5-minute digestion, agarose gel electrophoresis demonstrated that the recombinant enzyme exhibited RNA degradation efficiency comparable to conventional bovine RNase A.
Result: Equivalent RNA digestion performance while eliminating animal-derived materials.
- No Detectable DNase Activity
DNA integrity is critical during genomic DNA and plasmid preparation.
To verify DNase contamination, 500 ng DNA was incubated with Recombinant RNase A under standard digestion conditions. The DNA remained completely intact after incubation, indicating:
- No detectable DNase contamination
- High specificity toward RNA
- Safe use in DNA purification workflows
- Purity ≥90%
High purity contributes to consistent enzyme performance and minimizes background contaminants in sensitive downstream applications. Bovine pancreatic RNase A and recombinant RNase A (10418ES) were analyzed by SDS-PAGE; the results showed that the purity of recombinant RNase A (10418ES) was ≥90%.
- Broad Temperature Compatibility
RNase A is well known for its exceptional thermal stability.
Enzyme activity was evaluated across reaction temperatures ranging from 15°C to 70°C.
The recombinant enzyme maintained catalytic activity throughout this range and reached maximum activity at approximately 60°C, providing excellent flexibility for diverse experimental workflows.
- Excellent Storage Stability
Long-term stability is another important consideration for routine laboratory use.
Enzyme activity was monitored after storage at 25°C and 37°C for up to four months.
|
Storage Temperature |
Initial |
1 Week |
1 Month |
4 Months |
|
25°C (Kunitz units/mL) |
635 |
624 |
616 |
632 |
|
37°C (Kunitz units/mL) |
635 |
601 |
612 |
603 |
The enzyme retained more than 95% of its initial activity throughout the study, demonstrating outstanding stability under elevated storage temperatures.
Related Product
|
Name |
Cat. No. |
Size |
|
Recombinant RNase A (Liquid，DNase-Free ) |
10418ES01/05/10 |
1 mL 5 mL 10 mL |