Toward achieving nonprotein based selective retrieval of cross-linked peptides in mass spectrometric analysis of protein complexes

ANYL 46

Funing Yan and Ruth H. Angeletti. Biochemistry, Albert Einstein College of Medicine, 1635 Poplar St, RM 241, Bronx, NY 10461
Identification of the protein-protein interactions within multi-protein complexes is crucial to understand their mechanisms. Unique affinity separation techniques coupled with cross-linking will directly minimize background contamination and improve MS signal/noise and sensitivity in mass spectrometry. In this work, functional cross-linkers were synthesized by using 5-hydroxy 2-nitrobenzyl alcohol and 2-mercaptosuccinic acid as the starting materials. The linker will be react with model proteins such as Hemoglobin and tubulin dimers and then produce protein-protein cross-linkings in the complexes. The photo cleavable cross-linkers were designed to anchor/detach the cross-linked peptides by modified beads. In the future, the special protein-protein interactions in the interested parasites, T. gondii and C. parvum, will be investigated. (Supported by NIH/NIAID contract HHSN266200400054C)

 

General Posters
7:00 PM-9:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Analytical Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007