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Characterizing the Structure and Dynamics of Adaptive Immune Proteins to Inform Immunotherapy Design
Characterizing the Structure and Dynamics of Adaptive Immune Proteins to Inform Immunotherapy Design
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260311091508.5
- ISBN
- 9798280760233
- DDC
- 616
- 서명/저자
- Characterizing the Structure and Dynamics of Adaptive Immune Proteins to Inform Immunotherapy Design / Helen LeClair Woodward
- 발행사항
- [Sl] : University of Pennsylvania, 2025
- 형태사항
- 1 electronic resource (171 pages)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisors: Sgourakis, Nikolaos G. Committee members: Bowman, Gregory R.; Lynch, Kristen W.; Rhoades, Elizabeth; Spangler, Jamie B.; Sharp, Kim A.
- 학위논문주기
- - Ph.D. : University of Pennsylvania, 2025.
- 초록/해제
- 요약Human interleukin-2 (IL-2) is a crucial cytokine for T cell regulation, with therapeutic potential in cancer and autoimmune diseases. However, IL-2's pleiotropic effects across different immune cell types often lead to toxicity and limited efficacy. The first study in this thesis presents a detailed characterization of IL-2 dynamics compared to two engineered IL-2 mutants, "superkines" S15 and S1, which exhibit biased signaling towards effector T cells. Using NMR spectroscopy and molecular dynamics simulations, we demonstrate significant variations in core dynamic landscapes across the three variants. Furthermore, we rationally design a mutation (L56A) in the S1 core network, which partially reverts its dynamics, receptor binding affinity, and T cell signaling behavior. Our results suggest that modulating IL-2 dynamics is an untapped approach for designing immunotherapies with improved immune cell selectivity profiles.The intrinsic instability and inconsistent T cell receptor binding mode of the class I major histocompatibility complex (MHC-I) are fundamental challenges that hinder development of therapeutics. The second study leverages the positive allosteric coupling between the peptide and β2m subunits of MHC-I by engineering a disulfide bond bridging conserved epitopes across the HC/β2m interface to generate stable, peptide-receptive molecules. Using solution NMR, we demonstrate that the disulfide bond induces long-range conformational and dynamical changes in the α2-1 helix., indicating that the interchain disulfide bond stabilizes MHC-I molecules in an open conformation to promote peptide exchange. In the third study, we demonstrate the application of a designed MHC-I design, SMART A*02:01, for solution mapping of the A6c134 TCR docking footprint using NMR spectroscopy. We establish that the use of our engineered construct recapitulates the native conformation of the MHC-I peptide binding groove and accurately detects the critical binding sites on SMART A*02:01 that engage A6c134. Our approach allows for high-resolution mapping of TCR/MHC-I interactions, alleviating the need for complete structure elucidation, and may be paired with computational modeling approaches for structure-guided optimization and clinical development.Taken together, solution NMR techniques provide high-resolution insights into protein structure and conformational dynamics. Furthermore, these efforts highlight the application of NMR analyses to inform rational protein design and guide the development of diagnostics and therapeutics.
- 언어주기
- English
- 일반주제명
- Biophysics
- 일반주제명
- Immunology
- 일반주제명
- Biochemistry
- 일반주제명
- Cellular biology
- 키워드
- Interleukin-2
- 키워드
- T cell receptors
- 키워드
- Cytokines
- 기타저자
- University of Pennsylvania Biochemistry and Molecular Biophysics
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260311091508.5
■006m o d
■007cr|nu||||||||
■020 ▼a9798280760233
■040 ▼aMiAaPQD▼beng▼cMiAaPQD▼erda
■082 ▼a616
■1001 ▼aWoodward, Helen LeClair▼eauthor.
■24510▼aCharacterizing the Structure and Dynamics of Adaptive Immune Proteins to Inform Immunotherapy Design ▼cHelen LeClair Woodward
■260 ▼a[Sl]▼bUniversity of Pennsylvania▼c2025
■264 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a1 electronic resource (171 pages)
■336 ▼atext▼btxt▼2rdacontent
■337 ▼acomputer▼bc▼2rdamedia
■338 ▼aonline resource▼bcr▼2rdacarrier
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisors: Sgourakis, Nikolaos G. Committee members: Bowman, Gregory R.; Lynch, Kristen W.; Rhoades, Elizabeth; Spangler, Jamie B.; Sharp, Kim A.
■5021 ▼bPh.D.▼cUniversity of Pennsylvania▼d2025.
■520 ▼aHuman interleukin-2 (IL-2) is a crucial cytokine for T cell regulation, with therapeutic potential in cancer and autoimmune diseases. However, IL-2's pleiotropic effects across different immune cell types often lead to toxicity and limited efficacy. The first study in this thesis presents a detailed characterization of IL-2 dynamics compared to two engineered IL-2 mutants, "superkines" S15 and S1, which exhibit biased signaling towards effector T cells. Using NMR spectroscopy and molecular dynamics simulations, we demonstrate significant variations in core dynamic landscapes across the three variants. Furthermore, we rationally design a mutation (L56A) in the S1 core network, which partially reverts its dynamics, receptor binding affinity, and T cell signaling behavior. Our results suggest that modulating IL-2 dynamics is an untapped approach for designing immunotherapies with improved immune cell selectivity profiles.The intrinsic instability and inconsistent T cell receptor binding mode of the class I major histocompatibility complex (MHC-I) are fundamental challenges that hinder development of therapeutics. The second study leverages the positive allosteric coupling between the peptide and β2m subunits of MHC-I by engineering a disulfide bond bridging conserved epitopes across the HC/β2m interface to generate stable, peptide-receptive molecules. Using solution NMR, we demonstrate that the disulfide bond induces long-range conformational and dynamical changes in the α2-1 helix., indicating that the interchain disulfide bond stabilizes MHC-I molecules in an open conformation to promote peptide exchange. In the third study, we demonstrate the application of a designed MHC-I design, SMART A*02:01, for solution mapping of the A6c134 TCR docking footprint using NMR spectroscopy. We establish that the use of our engineered construct recapitulates the native conformation of the MHC-I peptide binding groove and accurately detects the critical binding sites on SMART A*02:01 that engage A6c134. Our approach allows for high-resolution mapping of TCR/MHC-I interactions, alleviating the need for complete structure elucidation, and may be paired with computational modeling approaches for structure-guided optimization and clinical development.Taken together, solution NMR techniques provide high-resolution insights into protein structure and conformational dynamics. Furthermore, these efforts highlight the application of NMR analyses to inform rational protein design and guide the development of diagnostics and therapeutics.
■546 ▼aEnglish
■590 ▼aSchool code: 0175
■650 4▼aBiophysics
■650 4▼aImmunology
■650 4▼aBiochemistry
■650 4▼aCellular biology
■653 ▼aInterleukin-2
■653 ▼aMajor histocompatibility complex
■653 ▼aNuclear magnetic resonance
■653 ▼aT cell receptors
■653 ▼aCytokines
■7102 ▼aUniversity of Pennsylvania▼bBiochemistry and Molecular Biophysics.▼edegree granting institution.
■7201 ▼aSgourakis, Nikolaos G.▼edegree supervisor.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17356998▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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