LysNDeNovo: An algorithm enabling de novo sequencing of Lys‐N generated peptides fragmented by electron transfer dissociation
peer-reviewed · PROTEOMICS · 2010
| Date | 2010-03-01 |
| Type | peer-reviewed |
| Venue | PROTEOMICS |
| Publisher | Wiley |
| Contribution | algorithm |
| DOI | 10.1002/pmic.200900405 |
| Citations (OpenAlex) | 9 |
Abstract
Recently, we introduced a novel proteomics method employing a metalloendopeptidase with Lys-N specificity to produce proteolytic peptides. Fragmentation spectra generated by electron transfer dissociation, for a large proportion of the Lys-N proteolytic peptides, were found to be dominated by extensive series of c-type ions. Taking advantage of this unique spectral property, we developed an algorithm, LysNDeNovo, to facilitate de novo sequencing of these peptides. LysNDeNovo contains simple and naive heuristics to demonstrate a proof of concept, i.e. that Lys-N peptide electron transfer dissociation spectra are perfectly suited for de novo interpretation. A stringent “golden” dataset of peptides identified by conventional database search algorithms was taken to validate the performance of LysNDeNovo. The results on this dataset indicate that LysNDeNovo was able to confidently identify a considerable proportion (42%), without requiring any prior genome or protein sequences. Results of similar quantity and quality could also be obtained on a much more extensive experimental dataset, illustrating the potential for higher throughput de novo sequencing using these methods.
Methods and tools
- LysNDeNovo: Heuristic de novo sequencing for Lys-N peptides fragmented by ETD, exploiting their long c-ion series.
Cites (8)
- Spectral Dictionaries: Integrating de novo Peptide Sequencing with Database Search of Tandem Mass Spectra (2009) crossref
- De Novo Peptide Sequencing and Identification with Precision Mass Spectrometry (2007) crossref
- Performance Evaluation of Existing De Novo Sequencing Algorithms (2006) crossref
- Proteomics-Grade de Novo Sequencing Approach (2005) crossref
- PepNovo: de novo peptide sequencing via probabilistic network modeling (2005) crossref
- PEAKS: powerful software for peptide de novo sequencing by tandem mass spectrometry (2003) crossref
- Peptide and protein de novo sequencing by mass spectrometry (2003) crossref
- De novo peptide sequencing via tandem mass spectrometry (1999) crossref
Cited by (4)
- Combining De Novo Peptide Sequencing Algorithms, A Synergistic Approach to Boost Both Identifications and Confidence in Bottom-up Proteomics (2017) crossref
- Neutron-encoded Signatures Enable Product Ion Annotation From Tandem Mass Spectra (2013) both
- Database independent proteomics analysis of the ostrich and human proteome (2012) crossref
- An antibody-based biomarker discovery method by mass spectrometry sequencing of complementarity determining regions (2011) both