A protease for 'middle-down' proteomics.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 22706673.
- Also identified by DOI 10.1038/nmeth.2074 and PMC identifier 3430368.
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Abstract
We developed a method for restricted enzymatic proteolysis using the outer membrane protease T (OmpT) to produce large peptides (>6.3 kDa on average) for mass spectrometry-based proteomics. Using this approach to analyze prefractionated high-mass HeLa proteins, we identified 3,697 unique peptides from 1,038 proteins. We demonstrated the ability of large OmpT peptides to differentiate closely related protein isoforms and to enable the detection of many post-translational modifications.
Medical subject headings
- Peptides
- Proteolysis
- Proteomics
- Serine Endopeptidases