The oligosaccharide moieties of glycolipids and glycoproteins represent a diverse set of structures hypothesized to play roles in membrane surface reception, differentiation, and stabilization. Yet structural characterization of oligosaccharides has lagged behind that of other biological macromolecules, in part through the lack of suitable analytical methodology. It is the objective of this proposal to develop new methodology for the structural analysis of cell surface oligosaccharides and make preliminary application to constituent, monosaccharides, disaccharides, and higher oligomers. These applications will be carried out in ordered phases which bear analogy to biological membranes in an effort to elucidate not only conformation but surface association properties. The new methodology relies on the geometry dependence of quadrupole splittings in deuterium nmr spectra of molecules in magnetic field ordered liquid crystal environments. Multiple quantum nmr methods will be developed which allow assignment of quadruple doublets to specific sites in multiply labeled compounds. Algorithms for interpretation of these splittings in terms of molecular conformation will be developed. Information derived on preferred conformations and preferred modes of membrane association will be combined to improve an understanding of physiological and pathological processes dependent on recognition of membrane surface oligosaccharides.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM033225-03
Application #
3282658
Study Section
Biophysics and Biophysical Chemistry B Study Section (BBCB)
Project Start
1984-07-01
Project End
1987-06-30
Budget Start
1986-07-01
Budget End
1987-06-30
Support Year
3
Fiscal Year
1986
Total Cost
Indirect Cost
Name
Yale University
Department
Type
Schools of Arts and Sciences
DUNS #
082359691
City
New Haven
State
CT
Country
United States
Zip Code
06520
Gao, Qi; Chalmers, Gordon R; Moremen, Kelley W et al. (2017) NMR assignments of sparsely labeled proteins using a genetic algorithm. J Biomol NMR 67:283-294
Pederson, Kari; Chalmers, Gordon R; Gao, Qi et al. (2017) NMR characterization of HtpG, the E. coli Hsp90, using sparse labeling with 13C-methyl alanine. J Biomol NMR 68:225-236
Zhuo, You; Yang, Jeong-Yeh; Moremen, Kelley W et al. (2016) Glycosylation Alters Dimerization Properties of a Cell-surface Signaling Protein, Carcinoembryonic Antigen-related Cell Adhesion Molecule 1 (CEACAM1). J Biol Chem 291:20085-95
Chalmers, G; Glushka, J N; Foley, B L et al. (2016) Direct NOE simulation from long MD trajectories. J Magn Reson 265:1-9
Pederson, Kari; Mitchell, Daniel A; Prestegard, James H (2014) Structural characterization of the DC-SIGN-Lewis(X) complex. Biochemistry 53:5700-9
Frank, Martin; Walker, Ross C; Lanzilotta, William N et al. (2014) Immunoglobulin G1 Fc domain motions: implications for Fc engineering. J Mol Biol 426:1799-811
Barb, Adam W; Wang, Xu; Prestegard, James H (2013) Refolded recombinant Siglec5 for NMR investigation of complex carbohydrate binding. Protein Expr Purif 88:183-9
Barb, Adam W; Ho, Tienhuei Grace; Flanagan-Steet, Heather et al. (2012) Lanthanide binding and IgG affinity construct: potential applications in solution NMR, MRI, and luminescence microscopy. Protein Sci 21:1456-66
Barb, Adam W; Meng, Lu; Gao, Zhongwei et al. (2012) NMR characterization of immunoglobulin G Fc glycan motion on enzymatic sialylation. Biochemistry 51:4618-26
Barb, Adam W; Freedberg, DarĂ³n I; Battistel, Marcos D et al. (2011) NMR detection and characterization of sialylated glycoproteins and cell surface polysaccharides. J Biomol NMR 51:163-71

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