Merck

Endonuclease

Endonuclease

Endonuclease enzymes are used to reduce the level of nucleic acid contamination in bioprocessing workflows and research applications by cleaving DNA and RNA into smaller fragments. While a wide variety of natural sources are available, these endonuclease formulations can pose a challenge, however, as they may contain protease activity and viral contaminants.

Benzonase® endonuclease, a genetically engineered nuclease from Serratia marcescens, eliminates the risk of using naturally derived endonucleases and can degrade all forms of DNA and RNA. When used under appropriate reaction conditions, Benzonase® endonuclease will degrade all forms of DNA and RNA (single stranded, double stranded, linear, and circular) to oligonucleotides of approximately three to five base pairs in length. It has an exceptionally high level of specific activity without any detectable proteolytic activity.

With some manufacturing templates, use of a salt concentration above physiological levels (200mM NaCl) can be beneficial. Benzonase® Salt Tolerant endonuclease enables use of salt concentrations from 200mM to 1000mM NaCl for the midstream lysis and DNA digestion step during adeno-associated virus (AAV) vector production. This new addition to the Benzonase® portfolio is compatible with all tested detergents including Deviron® detergents, which are an alternative to Triton™ X-100.

Learn more about bioprocessing and research applications of Benzonase® endonuclease.



Bioprocessing Applications

Benzonase® endonuclease is well-suited for stringent bioprocessing applications. It degrades nucleic acids well below the 200 base pair fragment size required by the World Health Organization (WHO) and US Food and Drug Administration (FDA), is released under GMP IPE-PQG conditions, and has a Drug Master File in place with the FDA which can be cited in regulatory filings.

It is effective across a wide range of operating conditions and applications including:

  • Purification of viral vaccines and viral vector vaccines
  • Purification of cell and gene therapies
  • Purification of oncolytic viruses
  • Removal of DNA and RNA from proteins and other biologicals
  • Removal of host cell DNA

Three versions of IPEG PQG GMP Benzonase® endonuclease are available to meet different manufacturing needs. All are part of the Emprove® program that facilitates preparation of documents for regulatory submissions (Table 1).

Benzonase® endonucleases are prepared in the E. coli W3110 expression system and pose a minimal risk of viral contamination.

  • Benzonase® endonuclease Emprove® Expert
  • Benzonase® endonuclease Safety Plus Emprove® Expert is produced in a chemically defined medium and each batch is tested for the absence of adventitious viruses and mycoplasma.
  • Benzonase® Salt Tolerant endonuclease is also produced in a chemically defined media and each batch is tested for mycoplasma; on demand testing for adventitious viruses is available.

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Research Applications

Benzonase® endonuclease can be used for a variety of research applications including:

  • Removal of host DNA from microbiome samples
  • Improvement of microbial taxa identification for microbiome studies
  • Prevention of clumping during vaccine research
  • Reduction of lysate viscosity during recombinant protein extraction workflows, leading to improve yield of the target protein

A variety of high purity, high concentration Benzonase® endonuclease options are available.

Benzonase® endonuclease is also available packaged with protein extraction reagents to further facilitate workflows.


Technical Information

Table 1.Comparison of the benefits of Benzonase® endonuclease Safety Expert, Benzonase® endonuclease Emprove® Expert and Benzonase® endonuclease Plus Emprove®.

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