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Characterizing Dynamics of DNA Binding Proteins; p53 and DinB Homolog Polymerase (Dbh)- [electronic resource]
Characterizing Dynamics of DNA Binding Proteins; p53 and DinB Homolog Polymerase (Dbh) - [...
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Characterizing Dynamics of DNA Binding Proteins; p53 and DinB Homolog Polymerase (Dbh)- [electronic resource]
자료유형  
 학위논문파일 국외
최종처리일시  
20240214101910
ISBN  
9798380858519
DDC  
574.191
저자명  
Soto, Jenaro.
서명/저자  
Characterizing Dynamics of DNA Binding Proteins; p53 and DinB Homolog Polymerase (Dbh) - [electronic resource]
발행사항  
[S.l.]: : University of California, Irvine., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(125 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-05, Section: B.
주기사항  
Advisor: Cocco, Melanie.
학위논문주기  
Thesis (Ph.D.)--University of California, Irvine, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약Solution state NMR was used to study two DNA-binding proteins. Chapter one covers the different NMR techniques used, including hydrogen exchange, relaxation, chemical shift analysis, and temperature coefficients. In addition, I also implement circular dichroism and protein sequence analysis to supplement the NMR studies. Chapter two covers the p53 project, in which we compare protein dynamics between WT and rescue mutants to understand the mechanism of stabilization. We measured and compared dynamics from NMR hydrogen exchange rates of backbone amides and find that both rescue mutants impose a global stabilizing effect that dampens their motions in the beta-sandwich compared to WT DBD. We also compared NMR relaxation results to obtain flexibility information in the ps to ns timescale regime. Chapter three covers the dynamics of the DinB homolog polymerase (Dbh). This polymerase belongs to the Y-family of translesion DNA polymerases that can synthesize using a damaged DNA template. Since Dbh comes from the thermophilic archaeon Sulfolobus acidocaldarius, it is capable of functioning in a wide range of temperatures. Here we use NMR and circular dichroism to understand how the structure and dynamics of Dbh are affected by temperature (2-65°C) magnesium and manganese. HX reveals that both the thumb and finger domains are very dynamic relative to the palm and LF domains. These trends remain true at high temperatures with dynamics increasing as temperatures increase from 35 °C to 50 °C. Notably, NMR and CD spectra show that Dbh tertiary structure cold denatures beginning at 25 °C and increasing in denaturation as the temperature is lowered to 5 °C with little change observed by CD. Chemical shift perturbation analysis in the presence and absence of magnesium and manganese reveals three ion binding sites, even in the absence of DNA.
일반주제명  
Biophysics.
일반주제명  
Biology.
일반주제명  
Pharmaceutical sciences.
키워드  
DinB homolog polymerase
키워드  
Hydrogen exchange
키워드  
NMR
키워드  
DNA binding domain
키워드  
Protein dynamics
키워드  
Temperature coefficients
기타저자  
University of California, Irvine Pharmacological Sciences
기본자료저록  
Dissertations Abstracts International. 85-05B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
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