De Novo Sequencing
De Novo Sequencing — The determination of a peptide's amino acid sequence directly from mass spectrometry fragmentation data without relying on database matching.
What Is De Novo Sequencing?
De novo sequencing determines a peptide's amino acid sequence directly from its MS/MS fragmentation spectrum without relying on a protein database. De novo sequencing is essential for identifying novel peptides, AMPs from natural sources, and peptides from organisms without sequenced genomes.
Method
- Mass differences: Consecutive b- or y-ion mass differences correspond to individual amino acid residue masses
- Software: PEAKS, Novor, pNovo automate de novo interpretation of MS/MS spectra
- Validation: Synthetic peptide of proposed sequence must match retention time and MS/MS of natural peptide
Frequently Asked Questions
What is De Novo Sequencing?
The determination of a peptide's amino acid sequence directly from mass spectrometry fragmentation data without relying on database matching.
Why is De Novo Sequencing important in peptide research?
De Novo Sequencing is a fundamental concept in analytical as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.
Authority Sources
- De Novo Sequencing on Wikipedia
- Search De Novo Sequencing on PubChem (NIH)
- Research articles on ScienceDirect