Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Young, John K.

Committee Member

Armbrust, Kevin

Committee Member

Saebo, Svein

Date of Degree

12-13-2008

Document Type

Graduate Thesis - Open Access

Major

Chemistry

Degree Name

Master of Science

College

College of Arts and Sciences

Department

Department of Chemistry

Abstract

Extremophiles are the organisms that survive in environments which are inhospitable to other creatures. This thesis made an attempt to understand the enviromental effects, in particular saline, on enzyme structure by using three dimensional NMR. The enzyme DHFR1 from halophile Haloferaxi volcanii is complexed with its coactor NADPH, and the saline effects on the complex are studied by comparison with its apoenzyme, hvDHFR1. Backbone chemical shift assignments of the hvDHFR1:NADPH complex were attained which can be functional (along with future work) in understanding the effect of salts on enzyme structure, function, and flexibility. A total of 27 amino acids were found to show a significant change upon binding of NADPH and their positions were identified on enzyme complex. The secondary structure of hvDHFR1:NADPH is also predicted and overall global structure is found to be similar with the crystal structure of hvDHFR1 with few changes.

URI

https://hdl.handle.net/11668/17102

Comments

NMR||NADPH||hvDHFR1

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