The development of mass spectrometric methodology for the determination of various aspects of protein structure will be continued. A strategy for the determination of disulfide bridges in proteins is proposed that does not involve prior proteolytic digestion of the protein. It is based on the reaction of cyanide ion with -S-S- bonds accompanied by the cleavage of the peptide bond N-terminal to the cysteine so attached. Mass spectrometric molecular weight determination of the resulting fragments then permits the assignment of the disulfide bridges. The structure of thioredoxin h from wheat and that from the photosynthetic bacterium Chloroflexus will be determined, as well as that of the kidney stone formation inhibitor nephrocalcin. A major effort will be the development of methodology for the measurement of the type and frequency of replacement of one amino acid by another one during protein biosynthesis. These aberrant proteins will be present at very low abundance requiring a novel approach, such as tandem mass spectrometry carried out at high sensitivity. The results are expected to effect a better understanding of protein biosynthesis and may have practical significance for biotechnology.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Method to Extend Research in Time (MERIT) Award (R37)
Project #
5R37GM005472-37
Application #
2166076
Study Section
Metallobiochemistry Study Section (BMT)
Project Start
1977-01-01
Project End
1996-02-29
Budget Start
1995-01-01
Budget End
1996-02-29
Support Year
37
Fiscal Year
1995
Total Cost
Indirect Cost
Name
Massachusetts Institute of Technology
Department
Chemistry
Type
Schools of Arts and Sciences
DUNS #
City
Cambridge
State
MA
Country
United States
Zip Code
02139
Biemann, Klaus (2015) Structure Determination of Natural Products by Mass Spectrometry. Annu Rev Anal Chem (Palo Alto Calif) 8:1-19
Biemann, Klaus (2014) Laying the groundwork for proteomics: mass spectrometry from 1958 to 1988. J Proteomics 107:62-70