Structure-Activity Study of a-N-Methylated SHU9119 Analogues, hMC4R/TNF-a Antagonists, and Mutational Studies of the Melanocyte Stimulating Hormone Receptor
AuthorZingsheim, Morgan Robert
Committee ChairHruby, Victor J.
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PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractThe human melanocortin receptors (hMCRs) play a fundamental role in human behavior such as satiety, feeding, sexual and more. A set of SHU9119 peptide derivatives were studied for their structure-activity relationships. These peptides contained a sequential a-N-methylation amino acid scan.A second set of peptide derivatives intended to be used to create TNF-a; inhibition, via the melanocortin receptors. These peptides were shown to bind to all of the hMCR receptors, and only exhibit cAMP stimulation at hMC1R/hMC5R.The data from both of the sets of compounds illustrate that small changes in the stereochemistry of the SH9119 and TNF-a; derivatives cause drastic changes in the binding and the agonistic/antagonist properties of the compounds.This thesis determined the effect that hMC1R mutations have on the binding and cAMP response of well characterized ligands. This study ruled out 9 different residues for being the required for the cAMP response of the hMC1R.
Degree ProgramBiochemistry & Molecular Biophysics