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3D Orientation of α Helix in Muscle Myosin Regulatory Light Chain Using Bifunctional Electron Paramagnetic Resonance- [electronic resource]
3D Orientation of α Helix in Muscle Myosin Regulatory Light Chain Using Bifunctional Elec...
3D Orientation of α Helix in Muscle Myosin Regulatory Light Chain Using Bifunctional Electron Paramagnetic Resonance- [electronic resource]

Detailed Information

자료유형  
 학위논문파일 국외
최종처리일시  
20240214095844
ISBN  
9798379950675
DDC  
574.191
저자명  
Savich, Yahor Mikhalavich.
서명/저자  
3D Orientation of α Helix in Muscle Myosin Regulatory Light Chain Using Bifunctional Electron Paramagnetic Resonance - [electronic resource]
발행사항  
[S.l.]: : University of Minnesota., 2021
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2021
형태사항  
1 online resource(110 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
주기사항  
Advisor: Thomas, David D.
학위논문주기  
Thesis (Ph.D.)--University of Minnesota, 2021.
사용제한주기  
This item must not be sold to any third party vendors.
사용제한주기  
This item must not be added to any third party search indexes.
초록/해제  
요약Muscle contraction is a coordinated work of nanometer-sized force generators, myosin molecules. These molecules are out of equilibrium: they use the energy stored in the form of ATP to move collectively along the track protein actin. The myosin molecules transfer their work via lever arms that connect force generators to their cargo. Orientation of these lever arms has been studied thoroughly since 1) their structural dynamics is fundamental for understanding the muscle contraction and 2) their particular orientations are associated with disease states of cardiac and skeletal muscle. Electron microscopy, fluorescence polarization, and X-ray diffraction have provided insight into the structure of muscle, but there is still no high-resolution data of the vertebrate lever arm orientation available at ambient (not vitrified or crystallized) conditions. The present work establishes a method of measuring the orientation of the alpha helices in three dimensions using electron paramagnetic resonance (EPR). Chapter 3 introduces the use of EPR with bifunctional spin labels attached to different helices of the myosin regulatory light chain (RLC) protein with and without ATP. Demembranated skeletal muscle fibers were aligned with the slowly-varying magnetic field; RLC was chemically substituted by labeled RLC; axial orientational dynamics of the probe with respect to the muscle axis was determined. Chapter 4 utilizes 1) directional statistics that replaces the previous use of a Gaussian distribution and provides new insights into the degree of disorder and 2) a new bifunctional probe that adds an azimuthal dimension to the orientational data. Together, these techniques allow determination of the tilt and roll angles of the alpha helix without relying on the myosin structure.
일반주제명  
Biophysics.
일반주제명  
Biostatistics.
일반주제명  
Biochemistry.
키워드  
Bifunctional spin label
키워드  
EPR
키워드  
Muscle
키워드  
Myosin
키워드  
Spectroscopy
키워드  
Electron microscopy
기타저자  
University of Minnesota Physics
기본자료저록  
Dissertations Abstracts International. 85-01B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008240612s2021      us  |||||||||||||||c||eng  d
■001000016930961
■00520240214095844
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798379950675
■035    ▼a(MiAaPQ)AAI28549023
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a574.191
■1001  ▼aSavich,  Yahor  Mikhalavich.
■24510▼a3D  Orientation  of  α  Helix  in  Muscle  Myosin  Regulatory  Light  Chain  Using  Bifunctional  Electron  Paramagnetic  Resonance▼h[electronic  resource]
■260    ▼a[S.l.]:▼bUniversity  of  Minnesota.  ▼c2021
■260  1▼aAnn  Arbor  :▼bProQuest  Dissertations  &  Theses,  ▼c2021
■300    ▼a1  online  resource(110  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-01,  Section:  B.
■500    ▼aAdvisor:  Thomas,  David  D.
■5021  ▼aThesis  (Ph.D.)--University  of  Minnesota,  2021.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■506    ▼aThis  item  must  not  be  added  to  any  third  party  search  indexes.
■520    ▼aMuscle  contraction  is  a  coordinated  work  of  nanometer-sized  force  generators,  myosin  molecules.  These  molecules  are  out  of  equilibrium:  they  use  the  energy  stored  in  the  form  of  ATP  to  move  collectively  along  the  track  protein  actin.  The  myosin  molecules  transfer  their  work  via  lever  arms  that  connect  force  generators  to  their  cargo.  Orientation  of  these  lever  arms  has  been  studied  thoroughly  since  1)  their  structural  dynamics  is  fundamental  for  understanding  the  muscle  contraction  and  2)  their  particular  orientations  are  associated  with  disease  states  of  cardiac  and  skeletal  muscle.  Electron  microscopy,  fluorescence  polarization,  and  X-ray  diffraction  have  provided  insight  into  the  structure  of  muscle,  but  there  is  still  no  high-resolution  data  of  the  vertebrate  lever  arm  orientation  available  at  ambient  (not  vitrified  or  crystallized)  conditions.  The  present  work  establishes  a  method  of  measuring  the  orientation  of  the  alpha  helices  in  three  dimensions  using  electron  paramagnetic  resonance  (EPR).  Chapter  3  introduces  the  use  of  EPR  with  bifunctional  spin  labels  attached  to  different  helices  of  the  myosin  regulatory  light  chain  (RLC)  protein  with  and  without  ATP.  Demembranated  skeletal  muscle  fibers  were  aligned  with  the  slowly-varying  magnetic  field;  RLC  was  chemically  substituted  by  labeled  RLC;  axial  orientational  dynamics  of  the  probe  with  respect  to  the  muscle  axis  was  determined.  Chapter  4  utilizes  1)  directional  statistics  that  replaces  the  previous  use  of  a  Gaussian  distribution  and  provides  new  insights  into  the  degree  of  disorder  and  2)  a  new  bifunctional  probe  that  adds  an  azimuthal  dimension  to  the  orientational  data.  Together,  these  techniques  allow  determination  of  the  tilt  and  roll  angles  of  the  alpha  helix  without  relying  on  the  myosin  structure.
■590    ▼aSchool  code:  0130.
■650  4▼aBiophysics.
■650  4▼aBiostatistics.
■650  4▼aBiochemistry.
■653    ▼aBifunctional  spin  label
■653    ▼aEPR
■653    ▼aMuscle
■653    ▼aMyosin
■653    ▼aSpectroscopy
■653    ▼aElectron  microscopy
■690    ▼a0786
■690    ▼a0487
■690    ▼a0308
■71020▼aUniversity  of  Minnesota▼bPhysics.
■7730  ▼tDissertations  Abstracts  International▼g85-01B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0130
■791    ▼aPh.D.
■792    ▼a2021
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16930961▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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