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EXPANDING THE SCOPE OF HETEROGENEOUS BACKBONE DESIGNS TO INCLUDE SINGLE- AND MULTI-DOMAIN ZINC FINGER PROTEINS

George, Kelly (2019) EXPANDING THE SCOPE OF HETEROGENEOUS BACKBONE DESIGNS TO INCLUDE SINGLE- AND MULTI-DOMAIN ZINC FINGER PROTEINS. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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Abstract

Polymers with specific folded conformations — termed “foldamers” — lend themselves to a range of potential applications in therapeutic development and biomedical and material sciences. One promising approach to foldamer design is to incorporate a combination of unnatural building blocks that retain a peptide’s natural side chains while altering the backbone upon which the side chains are displayed. This creates a peptide variant with a heterogenous backbone and native-like folds and functions.
The focus of this dissertation is on recent work towards expanding the scope of heterogeneous backbone design strategies and consists of two main goals. The first goal is to mimic the tertiary structure of a single zinc finger domain (the third finger of Specificity protein 1, Sp1-3). This expands design strategies past simple tertiary structures and presents dynamic challenges such as retaining a precise metal coordination site. Data shown here indicate that appropriately designed alterations can allow for a tertiary structure that is superior to that of the native backbone in the context of folded stability and native ligand binding.
The second goal discussed in this work is two part: 1) to investigate if the increase in folded stability seen with single domain Sp1-3 backbone variants can be generalized to other Cis2His2 zinc finger sequences and 2) to synthesize a multi-domain zinc finger protein through native chemical ligation. Each of these aims attempts to push towards the longer-term goal of gaining a better understanding of how backbone alterations impact DNA binding in multi-domain zinc fingers.


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Details

Item Type: University of Pittsburgh ETD
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
George, Kellyklg84@pitt.eduklg840000-0001-7058-4791
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairHorne, Sethhorne@pitt.edu
Committee MemberWeber, Stephensweber@pitt.edu
Committee MemberIslam, KabirulKAI27@pitt.edu
Committee MemberBerman, Andreaajb190@pitt.edu
Date: 30 January 2019
Date Type: Publication
Defense Date: 31 August 2018
Approval Date: 30 January 2019
Submission Date: 18 August 2018
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 113
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Chemistry
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: foldamers, unnatural peptides, peptide therapeutics
Date Deposited: 30 Jan 2019 22:47
Last Modified: 30 Jan 2019 22:47
URI: http://d-scholarship.pitt.edu/id/eprint/35473

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  • EXPANDING THE SCOPE OF HETEROGENEOUS BACKBONE DESIGNS TO INCLUDE SINGLE- AND MULTI-DOMAIN ZINC FINGER PROTEINS. (deposited 30 Jan 2019 22:47) [Currently Displayed]

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