Structural elucidation of N-terminal post-translational modifications by mass spectrometry: Application to chicken enolase and the α- and β-subunits of bovine mitochondrial F 1 -ATPase
Analytical Biochemistry, ISSN: 0003-2697, Vol: 169, Issue: 2, Page: 217-226
1988
- 7Citations
- 5Captures
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Metrics Details
- Citations7
- Citation Indexes7
- CrossRef7
- Captures5
- Readers5
Article Description
Peptides generated from enzymatic hydrolysis of chicken enolase and the α- and β-subunits of bovine F 1 -ATPase were analyzed by mass spectrometry to determine the nature of their modified N-termini. In the case of chicken enolase, a peptide was isolated from a Staphlococcus aureus proteinase digest by HPLC and analyzed directly by fast atom bombardment mass spectrometry (FABMS). In conjunction with mass spectral evidence obtained from the methyl ester derivative and a secondary tryptic peptide, a structure is proposed containing an N -acetyl serine at the N-terminus. The α-subunit of bovine mitochondrial ATPase was chromatographed by HPLC after S. aureus proteinase digestion and a single peak was analyzed on the basis of predicted retention times. A M r 716 was determined by FABMS and pyrrolidone carboxylic acid was deduced on the basis of its amino acid composition and partial Edman sequence data. The β-subunit of ATPase produced a series of closely eluting peaks on HPLC after limited digestion with trypsin of the α 2 β 2 complex. These peptides were analyzed by both Edman degradation and FABMS. These data showed the N-terminus to be frayed with N-terminal sequences beginning in pyro-Glu-Ala-Ser, Gln-Ala-Ser, Glu-Ala-Ser, Ala-Ser, and Ser but with no N -acetyl-Ser as was previously thought.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/0003269788902771; http://dx.doi.org/10.1016/0003-2697(88)90277-1; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0023905318&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/2898218; https://linkinghub.elsevier.com/retrieve/pii/0003269788902771; http://dx.doi.org/10.1016/0003-2697%2888%2990277-1; https://dx.doi.org/10.1016/0003-2697%2888%2990277-1
Elsevier BV
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