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This volume in the Advances in Protein Chemistry series features cutting-edge articles on topics in protein chemistry. This volume includes chapters on the structural basis of effector regulation and signal termination in heterotrimeric GƒÑƒnƒnproteins; How do receptors activate G proteins; Some mechanistic insights into GPCR activation from detergent solubilized ternary complexes on beads; Activation of G protein coupled receptors; Kinetic analysis of g-protein-coupled receptor signaling using fluorescence resonance energy transfer in living cells; Regulation of Rho Guanine Nucleotide Exchange Factors (RhoGEFs) by G proteins.

This third volume in the trio covering G proteins, features integrated approaches to studying G proteins. Methods pertaining to signaling mechanisms are presented, including theoretical and modeling approaches, biochemistry and molecular biology, and cell biology and physiology. The techniques for studying the structure and function of G proteins are important not only to those with specific research interests in them, but also endocrinologists and pharmacologists conducting research on signaling mechanisms that are increasingly understood to interact with G proteins.

G Proteins is an introduction to one class of systems used for signal transduction at the cell surface, with emphasis on its utilization of a heterotrimeric GTP-binding protein (G protein) to mediate the transfer of information across the plasma membrane, from receptor to effector. Topics covered include the structure and function of G-protein a chains, ADP-ribosylation factor of adenylyl cyclase, and G protein-mediated effects on ionic channels. The organization of genes coding for G-protein a subunits in higher and lower eukaryotes is also discussed. This book is comprised of 25 chapters and begins with an overview of G proteins and their role in signal transduction. The next section focuses on the structural aspects of G proteins, with substantial emphasis on? subunits. The mechanism of G protein coupling to effector systems is also considered, using the hormone-regulated adenylyl cyclase and light-regulated cGMP phosphodiesterase as models. Subsequent chapters deal with receptors and effector systems, together with the cellular functions that may be regulated by heterotrimeric G proteins. In particular, the interaction of insulin with G proteins is discussed, along with receptor regulation of cell calcium and phospholipase C activity. This monograph should be useful to students and scientists interested in G proteins.