The proposed research will develop new methodologies utilizing mass spectrometry for examining protein structure, which is the key to understanding protein function and critical for a molecular level understanding of virtually every disease. This research will enable facile new experiments for studying protein folding and verifying native protein folds, etc... Particular emphasis will be placed on examination of natively unfolded proteins, a reclusive class of molecules related to many neurological diseases and cancer. These goals will be achieved by experiments utilizing noncovalent mass tags designed to respond to the chemical availability of select amino acid side chains on protein surfaces. By facilitating access to protein structure via simple yet sensitive experiments which can be carried out in less than a day, human health will be benefited in diverse ways. More specifically, this technique will be used to study the mechanism by which alpha-synuclein improper aggregates which is implicated in diseases such as Parkinson's and Alzheimer's.

Public Health Relevance

The successful treatment of diseases which are linked to protein aggregation such as Parkinson's and Alzheimer's will be greatly aided by tools that reveal molecular level information about protein structure. The completion of this work will enable researchers to explore protein structure at a molecular level in a simple and rapid fashion.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM084106-02
Application #
7945317
Study Section
Enabling Bioanalytical and Biophysical Technologies Study Section (EBT)
Program Officer
Edmonds, Charles G
Project Start
2009-09-30
Project End
2012-08-31
Budget Start
2010-09-01
Budget End
2012-08-31
Support Year
2
Fiscal Year
2010
Total Cost
$285,078
Indirect Cost
Name
University of California Riverside
Department
Chemistry
Type
Schools of Earth Sciences/Natur
DUNS #
627797426
City
Riverside
State
CA
Country
United States
Zip Code
92521
Tao, Yuanqi; Julian, Ryan R (2013) Factors that influence competitive intermolecular solvation of protonated groups in peptides and proteins in the gas phase. J Am Soc Mass Spectrom 24:1634-40
Tao, Yuanqi; Julian, Ryan R (2012) Examining protein surface structure in highly conserved sequence variants with mass spectrometry. Biochemistry 51:1796-802
Hamdy, Omar M; Julian, Ryan R (2012) Reflections on charge state distributions, protein structure, and the mystical mechanism of electrospray ionization. J Am Soc Mass Spectrom 23:1-6
Moore, Benjamin N; Hamdy, Omar; Julian, Ryan R (2012) Protein structure evolution in liquid DESI as revealed by selective noncovalent adduct protein probing. Int J Mass Spectrom 330-332:220-225
Sun, Qingyu; Tyler, Robert C; Volkman, Brian F et al. (2011) Dynamic interchanging native states of lymphotactin examined by SNAPP-MS. J Am Soc Mass Spectrom 22:399-407
Liao, Puhong; Langloss, Brian W; Johnson, Amber M et al. (2010) Two-component control of guest binding in a self-assembled cage molecule. Chem Commun (Camb) 46:4932-4
Diedrich, Jolene K; Julian, Ryan R (2010) Site-selective fragmentation of peptides and proteins at quinone-modified cysteine residues investigated by ESI-MS. Anal Chem 82:4006-14
Ly, Tony; Julian, Ryan R (2010) Elucidating the tertiary structure of protein ions in vacuo with site specific photoinitiated radical reactions. J Am Chem Soc 132:8602-9
Sun, Qingyu; Yin, Sheng; Loo, Joseph A et al. (2010) Radical directed dissociation for facile identification of iodotyrosine residues using electrospray ionization mass spectrometry. Anal Chem 82:3826-33