The long-term objective of this proposal is to establish the foundation for a relatively small, inexpensive, but very powerful instrument for obtaining structural information from and molecular weights of high mass biomolecules. Specifically, the instrument will couple electrospray ionization with a quadrupole ion trap mass spectrometer. Electrospray ionization has been shown to be capable of producing highly charged ions from large biomolecules (MW > 104 Da). A quadrupole ion trap can be used to manipulate these ions both to provide molecular weights and to provide structural information. This work is devoted to optimizing the interface between the electrospray on source and the mass analyzer, exploring and optimizing instrumental techniques for mass/charge measurement, and performing fundamental research on the reactivities of the highly charged biomolecules in the ion trap environment. The latter work is designed to maximize both sensitivity and the amount of structural information obtained. This work will benefit the biomedical community by providing relatively low-cost means for making accurate molecular weight determinations and for obtaining structural information from a wide range of high mass molecules. The proposed instrument, due to its small size and low cost, would be much more accessible to researchers in the biomedical community than the much larger and more expensive instrumentation presently available.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
1R01GM045372-01A1
Application #
3304823
Study Section
Metallobiochemistry Study Section (BMT)
Project Start
1991-09-01
Project End
1994-08-31
Budget Start
1991-09-01
Budget End
1992-08-31
Support Year
1
Fiscal Year
1991
Total Cost
Indirect Cost
Name
Lockheed Martin Energy Systems, Inc.
Department
Type
DUNS #
City
Oak Ridge
State
TN
Country
United States
Zip Code
37831
Peng, Zhou; Pilo, Alice L; Luongo, Carl A et al. (2015) Gas-Phase Amidation of Carboxylic Acids with Woodward's Reagent K Ions. J Am Soc Mass Spectrom 26:1686-94
Pilo, Alice L; Bu, Jiexun; McLuckey, Scott A (2015) Transformation of [M + 2H](2+) Peptide Cations to [M - H](+), [M + H + O](+), and M(+•) Cations via Ion/Ion Reactions: Reagent Anions Derived from Persulfate. J Am Soc Mass Spectrom 26:1103-14
Gilbert, Joshua D; Prentice, Boone M; McLuckey, Scott A (2015) Ion/ion reactions with ""onium"" reagents: an approach for the gas-phase transfer of organic cations to multiply-charged anions. J Am Soc Mass Spectrom 26:818-25
Rojas-Betancourt, Stella; Stutzman, John R; Londry, Frank A et al. (2015) Gas-Phase Chemical Separation of Phosphatidylcholine and Phosphatidylethanolamine Cations via Charge Inversion Ion/Ion Chemistry. Anal Chem 87:11255-62
Peng, Zhou; McLuckey, Scott A (2015) C-terminal peptide extension via gas-phase ion/ion reactions. Int J Mass Spectrom 391:17-23
Gilbert, Joshua D; Fisher, Christine M; Bu, Jiexun et al. (2015) Strategies for generating peptide radical cations via ion/ion reactions. J Mass Spectrom 50:418-26
Peng, Zhou; McGee, William M; Bu, Jiexun et al. (2015) Gas phase reactivity of carboxylates with N-hydroxysuccinimide esters. J Am Soc Mass Spectrom 26:174-80
Pilo, Alice L; McLuckey, Scott A (2014) Oxidation of methionine residues in polypeptide ions via gas-phase ion/ion chemistry. J Am Soc Mass Spectrom 25:1049-57
McGee, William M; McLuckey, Scott A (2014) Efficient and directed peptide bond formation in the gas phase via ion/ion reactions. Proc Natl Acad Sci U S A 111:1288-92
McGee, William M; McLuckey, Scott A (2013) Gas Phase Dissociation Behavior of Acyl-Arginine Peptides. Int J Mass Spectrom 354-356:181-187

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