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  • P-ISSN 2233-4203
  • E-ISSN 2093-8950

Effects of Temperature and Acetonitrile on Microwave-Assisted Weak Acid Protein Hydrolysis

Mass Spectrometry Letters / Mass Spectrometry Letters, (P)2233-4203; (E)2093-8950
2018, v.9 no.2, pp.46-50
https://doi.org/10.5478/MSL.2018.9.2.46
Nam Mihyeon (Chungnam National University)
Lee Dabin (Chungnam National University)
Kim Yeoseon (Chungnam National University)
Kim Jeongkwon (Chungnam National University)
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Abstract

The effects of temperature and acetonitrile (ACN) concentration on microwave-assisted weak-acid hydrolysis of pro- teins were investigated. Myoglobin was hydrolyzed for 1 h using 2% formic acid and a microwave with different concentrations of ACN (0, 5, and 10%) at various temperatures (50, 60, 70, 80, 90, and 100 o C). The numbers of peptides identified with each concentration of ACN were the same for each temperature. The greatest number of peptides (18 total) was obtained with hydro- lysis at 100 o C, and 6 of these were a result of additional removal of aspartic acid at the C-terminus. Hydrolysis at 80 o C resulted in 13 peptides, of which only 1 was generated by the additional removal of aspartic acid, and 12 were observed with hydrolysis at 100 o C. Our results demonstrate that microwave-assisted weak-acid hydrolysis of proteins can be performed successfully at 80 o C, which could be beneficial for limiting side reactions and generating larger peptide sequences.

keywords
Microwave, MALDI, Acid hydrolysis, Acetonitrile, Temperature


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Submission Date
2018-02-21
Revised Date
2018-03-03
Accepted Date
2018-03-12
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