Tryp-N: A Thermostable Protease for the Production of N-terminal Argininyl and Lysinyl Peptides

Wilson, J.P., Ipsaro, J. J., Del Giudice, S.N., Turna, N. S., Gauss, C. M., Dusenbury, K.H., Marquart, K., Rivera, K. D., Pappin, D. J. (March 2020) Tryp-N: A Thermostable Protease for the Production of N-terminal Argininyl and Lysinyl Peptides. J Proteome Res, 19 (4). pp. 1459-1469. ISSN 1535-3893 (Public Dataset)

DOI: 10.1021/acs.jproteome.9b00713


Bottom-up proteomics is a mainstay in protein identification and analysis. These studies typically employ proteolytic treatment of biological samples to generate suitably sized peptides for tandem mass spectrometric (MS) analysis. In MS, fragmentation of peptides is largely driven by charge localization. Consequently, peptides with basic centers exclusively on their N-termini produce mainly b-ions. Thus, it was long ago realized that proteases that yield such peptides would be valuable proteomic tools for achieving simplified peptide fragmentation patterns and peptide assignment. Work by several groups has identified such proteases, however, structural analysis of these suggested that enzymatic optimization was possible. We therefore endeavored to find enzymes that could provide enhanced activity and versatility while maintaining specificity. Using these previously described proteases as informatic search templates, we discovered and then characterized a thermophilic metalloprotease with N-terminal specificity for arginine and lysine. This enzyme, dubbed Tryp-N, affords many advantages including improved thermostability, solvent and detergent tolerance, and rapid digestion time.

Item Type: Paper
Subjects: bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification
CSHL Authors:
Communities: CSHL Cancer Center Program > Cellular Communication in Cancer Program
CSHL labs > Pappin lab
Depositing User: Adrian Gomez
Date: March 2020
Date Deposited: 02 Apr 2020 19:27
Last Modified: 29 Jun 2021 17:59
PMCID: PMC7842235
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