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Full-Text Articles in Life Sciences
Stability And Activity Of Naturally Occurring Rgs2 Variants, Patrick Stockwell
Stability And Activity Of Naturally Occurring Rgs2 Variants, Patrick Stockwell
Electronic Thesis and Dissertation Repository
Regulator of G protein signaling protein 2 (RGS2) attenuates G Protein-Coupled Receptor (GPCR) signaling by promoting the hydrolysis of GTP in the activated Gα subunit to GDP, thereby governing many physiological and pathophysiological signals. However, how RGS2 itself is regulated remains to be elucidated. In this study, our principal goal was to discover the molecular mechanisms controlling RGS2 degradation and if altered degradation affects Gα signaling. RGS2 has four initiation sites (at residues 1, 5, 16, and 33), resulting in the existence of four distinct N-terminal initiation site variants. Additionally, there are naturally occurring mutations in this region at residues …
Hippocalcin Response To Calcium: Do Conserved Tryptophans – W30 Or W103 – Matter?, Sunkesula K. Sagar
Hippocalcin Response To Calcium: Do Conserved Tryptophans – W30 Or W103 – Matter?, Sunkesula K. Sagar
Graduate School of Biomedical Sciences Theses and Dissertations
Changes in intracellular calcium levels play a very important role in cell signaling, in turn, affecting neuronal functions such as memory, learning and cell death. A class of proteins called Neuronal Calcium Sensor (NCS) proteins serves to modulate the functioning of the neuronal cells in response to changes in calcium levels, and prevent neuronal apoptosis. Structurally, all NCS proteins have 4 calcium-binding EF hand motifs, although EF1 does not bind to calcium in many members. All NCS proteins have an acyl modification at the N- terminus – where a myristoyl group is added post-translationally. Hippocalcin (HPCA) is an NCS protein, …