title: The impact of X-ray crystallography and NMR on intracellular calcium signal transduction by EF-hand proteins: crossing the threshold from structure to biology and medicine.
abstract: The use of x-ray crystallography and solution nuclear magnetic resonance (NMR) spectroscopy has revolutionized our understanding of the transduction of intracellular calcium signals into cellular responses. Indeed, the ability to cross a critical threshold from basic descriptive structural biochemistry to real-world applications in therapeutics and biotechnology now looms on the experimental horizon. The ~500 atomic resolution structures determined by x-ray and NMR approaches and deposited in the Protein Data Bank, many of which are of complexes of EF-hand proteins with peptide fragments of cellular targets, have yielded an extremely thorough description for how EF-hand proteins respond to the binding of calcium. Although this database of structures is a powerful structural tool to describe EF-hand protein function, it is limited in its ability to have a significant impact on biology and medicine because the structural effects on the downstream target are not determined. The opportunity that now lies before us is to extend this EF-hand-centric structural information so that the alterations in the target proteins are defined and the structural basis for functional consequences downstream is understood.
authors.affiliation: Department of Biochemistry, Center for Structural Biology, Vanderbilt University, Nashville, TN 37232-8725, USA. walter.chazin@vanderbilt.edu
authors.forename: Walter J
authors.initials: WJ
authors.lastname: Chazin
mesh_terms: D002118:Calcium / Q000378:metabolism*; D002135:Calcium-Binding Proteins / Q000378:metabolism*; D018360:Crystallography, X-Ray; D020832:EF Hand Motifs; D008958:Models, Molecular; D019906:Nuclear Magnetic Resonance, Biomolecular; D015398:Signal Transduction
chemical_list: D002135:Calcium-Binding Proteins; D002118:Calcium