Investigations of macromolecules and small biomolecules by solution NMR: applications to the intracellular loop structure of the sodium-calcium exchanger and metabolite identification methods

Bibliographic Details
Main Author:	Yuan, Jiaqi
Language:	English
Published:	The Ohio State University / OhioLINK 2018
Subjects:	Chemistry
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=osu1542630633935356

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-osu15426306339353562021-08-03T07:08:53Z Investigations of macromolecules and small biomolecules by solution NMR: applications to the intracellular loop structure of the sodium-calcium exchanger and metabolite identification methods Yuan, Jiaqi Chemistry Biomolecules including macromolecules, such as proteins and nucleic acids, and small molecules, such as metabolites and natural products, play essential roles in biological systems. To better understand their biological functions, many studies have been done on biomolecular characterization and analysis. Among many techniques, solution nuclear magnetic resonance (NMR) spectroscopy is a powerful tool that has been widely applied to analyze molecules covering a wide size range. Solution NMR provides qualitative and quantitative information of molecules at atomic level detail, which makes it an ideal method to investigate biomolecules including proteins and metabolites.This dissertation focuses on applications of biomolecular NMR for both protein structure determination and metabolite identification. Chapter 1 gives an overview of the importance of proteins and metabolites. The general principles of protein structure determination and metabolomics studies by solution NMR are introduced. In Chapter 2, the application of solution NMR structure determination on the structural study of a Na<sup>+</sup>/Ca<sup>2+</sup> exchanger (NCX) intracellular loop protein is discussed in details. The study shows clear evidence that the N-terminal half of the intracellular loop is largely disordered with a structured region that forms a two-helix bundle (THB) domain. The work contributes toward the understanding of the regulatory mechanism of eukaryotic NCX protein. Chapter 3 is a summary of bead-based metabolomics sample simplification. The differential effects of bead treatment on specific metabolites in mixtures are further discussed in Chapters 4 and 5. The results show that ion-exchange resin bead treatment can substantially facilitate metabolite characterization by clustering of HSQC cross-peak amplitude changes and their assignment to individual molecules, including unknown metabolites with multiple spin systems (Chapter 4). Another treatment combines sodium periodite and hydrazide beads to remove carbohydrates from complex mixtures to significantly improve the unambiguous identification of metabolites that otherwise would be obscured by carbohydrate signals (Chapter 5). 2018 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1542630633935356 http://rave.ohiolink.edu/etdc/view?acc_num=osu1542630633935356 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Chemistry
spellingShingle	Chemistry Yuan, Jiaqi Investigations of macromolecules and small biomolecules by solution NMR: applications to the intracellular loop structure of the sodium-calcium exchanger and metabolite identification methods
author	Yuan, Jiaqi
author_facet	Yuan, Jiaqi
author_sort	Yuan, Jiaqi
title	Investigations of macromolecules and small biomolecules by solution NMR: applications to the intracellular loop structure of the sodium-calcium exchanger and metabolite identification methods
title_short	Investigations of macromolecules and small biomolecules by solution NMR: applications to the intracellular loop structure of the sodium-calcium exchanger and metabolite identification methods
title_full	Investigations of macromolecules and small biomolecules by solution NMR: applications to the intracellular loop structure of the sodium-calcium exchanger and metabolite identification methods
title_fullStr	Investigations of macromolecules and small biomolecules by solution NMR: applications to the intracellular loop structure of the sodium-calcium exchanger and metabolite identification methods
title_full_unstemmed	Investigations of macromolecules and small biomolecules by solution NMR: applications to the intracellular loop structure of the sodium-calcium exchanger and metabolite identification methods
title_sort	investigations of macromolecules and small biomolecules by solution nmr: applications to the intracellular loop structure of the sodium-calcium exchanger and metabolite identification methods
publisher	The Ohio State University / OhioLINK
publishDate	2018
url	http://rave.ohiolink.edu/etdc/view?acc_num=osu1542630633935356
work_keys_str_mv	AT yuanjiaqi investigationsofmacromoleculesandsmallbiomoleculesbysolutionnmrapplicationstotheintracellularloopstructureofthesodiumcalciumexchangerandmetaboliteidentificationmethods
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Investigations of macromolecules and small biomolecules by solution NMR: applications to the intracellular loop structure of the sodium-calcium exchanger and metabolite identification methods

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