This application requests continued support for an ongoing program of study on the physicochemical and biological properties of proteins and peptides in solution with emphasis on their interaction with each other and with small molecules. Both experimental and theoretical research projects are proposed. The two experimental projects are: (1) A combined CD-NMR study of the solution conformation of the Bradykinin-like agonists and antagonists: (D-Phe7)-, (Thi5,8)-, and (Thi5,8,D-Phe7)-bradykinin, where Thi is Beta-2-thienylalanine. The first analog is an agonist or an antagonist depending on the tissue; the second is a super agonist; and the third is a good antagonist. Elucidation and comparison of their solution conformation is essential for eventual understanding of their biological activities. (2) A study of the binding of subdomains of the 4 kDa C-terminal moiety of tubulin by MAP-2. Peptides corresponding to short discrete aminoacid sequences within the Alpha- and Beta-chain of the C-terminal moiety will be synthesized by the solid-phase method of Merrifield. The binding of each of these peptides to MAP-2 will be quantitated by sedimentation analysis in the Airfuge using radiolabeled peptide as a tracer. It is anticipated that the results may indicate which sequence might confer preferential binding of the Alpha-chain of tubulin to MAP-2. Our theoretical calculations on the mass transport of interacting macromolecules will be continued and extended to include: (1) The broad-zone Sephadex filtration of the myoglobin-ovalbumin system in order to answer certain questions raised by published experimental results on this model, complexing system; (2) The small-zone gel chromatography of systems in which the binding of a peptide (or other ligand) promoters dimerization of a protein, in order to provide the basis for estimating binding constants in systems such as MAP2-4 kDa C-terminal peptide fragment of tubulin; and (3) zone electrophoresis of hybridizing enzymes with kinetic control.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM028793-37
Application #
3276090
Study Section
Biophysics and Biophysical Chemistry B Study Section (BBCB)
Project Start
1981-06-01
Project End
1991-05-31
Budget Start
1988-06-01
Budget End
1989-05-31
Support Year
37
Fiscal Year
1988
Total Cost
Indirect Cost
Name
University of Colorado Denver
Department
Type
Schools of Medicine
DUNS #
065391526
City
Aurora
State
CO
Country
United States
Zip Code
80045
Cann, J R (1993) Theoretical studies on the mobility-shift behavior of binary protein-DNA complexes. Electrophoresis 14:669-79
Winzor, D J; Munro, P D; Cann, J R (1991) Experimental and theoretical studies of rate constant evaluation for the solute-matrix interaction in affinity chromatography. Anal Biochem 194:54-63
Yang, S N; Wolska-Klis, M M; Cann, J R (1991) Gel electrophoresis of reacting macromolecules. Rate-limited self-association. Anal Biochem 196:192-8
Cann, J R (1990) Analysis of the gel electrophoresis of looped protein-DNA complexes by computer simulation. J Mol Biol 216:1067-75
Appu Rao, A G; Cann, J R; Stewart, J M et al. (1990) Evidence of neuropeptide bivalency in the interaction of substance P with cerebroside sulfate. Int J Pept Protein Res 35:258-62
Cann, J R (1989) Phenomenological theory of gel electrophoresis of protein-nucleic acid complexes. J Biol Chem 264:17032-40
Rao, A G; Stewart, J M; Vavrek, R J et al. (1989) A fluorometric study of the interaction of bradykinin with lipids. Biochim Biophys Acta 997:278-83
Werner, W E; Cann, J R; Schachman, H K (1989) Boundary spreading in sedimentation velocity experiments on partially liganded aspartate transcarbamoylase. A ligand-mediated isomerization. J Mol Biol 206:231-7
Cann, J R; Rao, A G; Winzor, D J (1989) Numerical and experimental demonstrations of the need for caution in the use of zonal gel chromatography for characterizing ligand interactions with small acceptors. Arch Biochem Biophys 270:173-83
Cann, J R; York, E J; Stewart, J M et al. (1988) Small zone gel chromatography of interacting systems: theoretical and experimental evaluation of elution profiles for kinetically controlled macromolecule-ligand reactions. Anal Biochem 175:462-73

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