NDLI: Sequence database searches via de novo peptide sequencing by tandem mass spectrometry.

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Sequence database searches via de novo peptide sequencing by tandem mass spectrometry.

Content Provider	Semantic Scholar
Author	Taylor, J. Ashley Johnson, R. S.
Copyright Year	1997
Abstract	A method is described for searching protein sequence databases using tandem mass spectra of tryptic peptides. The approach uses a de novo sequencing algorithm to derive a short list of possible sequence candidates which serve as query sequences in a subsequent homology-based database search routine. The sequencing algorithm employs a graph theory approach similar to previously described sequencing programs. In addition, amino acid composition, peptide sequence tags and incomplete or ambiguous Edman sequence data can be used to aid in the sequence determinations. Although sequencing of peptides from tandem mass spectra is possible, one of the frequently encountered difficulties is that several alternative sequences can be deduced from one spectrum. Most of the alternative sequences, however, are sufficiently similar for a homology-based sequence database search to be possible. Unfortunately, the available protein sequence database search algorithms (e.g. Blast or FASTA) require a single unambiguous sequence as input. Here we describe how the publicly available FASTA computer program was modified in order to search protein databases more effectively in spite of the ambiguities intrinsic in de novo peptide sequencing algorithms.
File Format	PDF HTM / HTML
DOI	10.1002/(SICI)1097-0231(19970615)11:9<1067::AID-RCM953>3.0.CO;2-L
PubMed reference number	9204580
Journal	Medline
Volume Number	11
Issue Number	9
Alternate Webpage(s)	https://eurekamag.com/pdf/009/009399400.pdf
Alternate Webpage(s)	https://doi.org/10.1002/%28SICI%291097-0231%2819970615%2911%3A9%3C1067%3A%3AAID-RCM953%3E3.0.CO%3B2-L
Journal	Rapid communications in mass spectrometry : RCM
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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