The objective of the overall research in this laboratory is centered on achieving as complete a description as possible for the structures of peptides, proteins, nucleic acids and their complexes in solution, principally by NMR spectroscopy. At present particular emphasis is being placed on developing approaches which allow the investigation of larger and complex systems as well as increase the precision which these solution structures can be obtained, studies aimed at correlating structure and function, and experiments aimed at investigating protein folding. Structures for several proteins have been determined and analyzed. These include the cytokine interleukin-4, and the complex of the DNA binding domain of the erythroid transcription factor GATA-1 with its specific DNA target site. These studies have exploited many novel 3D and 4D heteronuclear NMR experiments to dramatically increase spectral resolution and thereby resolve assignment ambiguities in larger proteins. The dynamics of the cytokine interleukin-8 have been explored. The contact surface of the IgG binding domain of Streptococcal G complexed with a human IgGFc has been identified. Finally, the folding pathway and kinetics of the all beta- sheet protein interleukin-1beta have been investigated.

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Louis, John M; Byeon, In-Ja L; Baxa, Ulrich et al. (2005) The GB1 amyloid fibril: recruitment of the peripheral beta-strands of the domain swapped dimer into the polymeric interface. J Mol Biol 348:687-98
Ding, Keyang; Gronenborn, Angela M (2004) Sensitivity-enhanced IPAP experiments for measuring one-bond 13C'-13Calpha and 13Calpha-1Halpha residual dipolar couplings in proteins. J Magn Reson 167:253-8
Ding, Keyang; Gronenborn, Angela M (2004) Protein Backbone 1H(N)-13Calpha and 15N-13Calpha residual dipolar and J couplings: new constraints for NMR structure determination. J Am Chem Soc 126:6232-3
Dangi, Bindi; Gronenborn, Angela M; Rosner, Judah L et al. (2004) Versatility of the carboxy-terminal domain of the alpha subunit of RNA polymerase in transcriptional activation: use of the DNA contact site as a protein contact site for MarA. Mol Microbiol 54:45-59
Ding, Keyang; Louis, John M; Gronenborn, Angela M (2004) Insights into conformation and dynamics of protein GB1 during folding and unfolding by NMR. J Mol Biol 335:1299-307
Byeon, In-Ja L; Louis, John M; Gronenborn, Angela M (2004) A captured folding intermediate involved in dimerization and domain-swapping of GB1. J Mol Biol 340:615-25
Katoh, Etsuko; Louis, John M; Yamazaki, Toshimasa et al. (2003) A solution NMR study of the binding kinetics and the internal dynamics of an HIV-1 protease-substrate complex. Protein Sci 12:1376-85
Barrientos, Laura G; Louis, John M; Ratner, Daniel M et al. (2003) Solution structure of a circular-permuted variant of the potent HIV-inactivating protein cyanovirin-N: structural basis for protein stability and oligosaccharide interaction. J Mol Biol 325:211-23
Dobrodumov, Anatoliy; Gronenborn, Angela M (2003) Filtering and selection of structural models: combining docking and NMR. Proteins 53:18-32
Ding, Keyang; Gronenborn, Angela M (2003) Sensitivity-enhanced 2D IPAP, TROSY-anti-TROSY, and E.COSY experiments: alternatives for measuring dipolar 15N-1HN couplings. J Magn Reson 163:208-14

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