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Investigation of Spire and Cappuccino in Drosophila Oogenesis: Tool Development and Screening for Interactors
Investigation of Spire and Cappuccino in Drosophila Oogenesis: Tool Development and Screen...
Investigation of Spire and Cappuccino in Drosophila Oogenesis: Tool Development and Screening for Interactors

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자료유형  
 학위논문 서양
최종처리일시  
20250211152012
ISBN  
9798382832340
DDC  
574
저자명  
Bailey, Hannah Marie.
서명/저자  
Investigation of Spire and Cappuccino in Drosophila Oogenesis: Tool Development and Screening for Interactors
발행사항  
[Sl] : University of California, Los Angeles, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
173 p
주기사항  
Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
주기사항  
Advisor: Quinlan, Margot Elizabeth.
학위논문주기  
Thesis (Ph.D.)--University of California, Los Angeles, 2024.
초록/해제  
요약The Drosophila oocyte has long served as a model for understanding oogenesis, the process of egg development. An essential structure in Drosophila oocytes is a cytoplasmic actin meshwork that persists during mid-oogenesis. This complex actin network is built by the collaboration of actin nucleators: Spire (Spir) and Cappuccino (Capu). Removal of the actin mesh, and the concurrent decrease in Spir and Capu expression, coincides with the onset of fast cytoplasmic streaming, mixing cytoplasmic contents and reinforcing the establishment of polarity. Analogous actin meshes, built by Spir and Capu, have been characterized in other systems. The function of these networks appears to differ based on the localization of Capu while the role of the Drosophila actin mesh, outside of restricting cytoplasmic streaming, remains uncertain. This is in part, due to the current limitations of imaging the egg chamber ex vivo during mesh removal and the requirement of mesh components during earlier stages of development. To better characterize what the actin mesh does in oogenesis, we set out to generate improved tools for studying Spir and Capu. We established a gene-specific driver for Capu, capu-Gal4, that improved the rescue of capu null to 90% fertility. Using this driver, we uncovered evidence of additional roles for Capu in development outside of the actin mesh. Our attempts to improve transgene rescue of Spir were unsuccessful. In addition, we performed genome editing to endogenously tag Spir and Capu in Drosophila. With these tools, we confirmed the expression patterns of Spir and Capu and revealed previously undescribed localization in somatic cells. In addition, we employed knock-down screens to identify other genes that regulate the actin mesh or interact with Spir. Lastly, we have made progress in adapting long term live imaging methods to visualize the removal of the actin mesh.In sum, this work contributes new insights into Drosophila oogenesis and establishes the groundwork for further developing tools for the Drosophila research community. More specifically, it demonstrates that subtle changes in the interaction of actin nucleators leads to the formation of actin-based structures that play distinct cellular roles and exemplifies the need for scrupulous genetic investigations. 
일반주제명  
Molecular biology
일반주제명  
Entomology
일반주제명  
Biochemistry
일반주제명  
Genetics
키워드  
Drosophila oocytes
키워드  
Cappuccino
키워드  
Egg development
키워드  
Actin nucleators
키워드  
Cytoplasmic contents
기타저자  
University of California, Los Angeles Chemistry 0153
기본자료저록  
Dissertations Abstracts International. 85-12B.
전자적 위치 및 접속  
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MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a574
■1001  ▼aBailey,  Hannah  Marie.
■24510▼aInvestigation  of  Spire  and  Cappuccino  in  Drosophila  Oogenesis:  Tool  Development  and  Screening  for  Interactors
■260    ▼a[Sl]▼bUniversity  of  California,  Los  Angeles▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a173  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-12,  Section:  B.
■500    ▼aAdvisor:  Quinlan,  Margot  Elizabeth.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Los  Angeles,  2024.
■520    ▼aThe  Drosophila  oocyte  has  long  served  as  a  model  for  understanding  oogenesis,  the  process  of  egg  development.  An  essential  structure  in  Drosophila  oocytes  is  a  cytoplasmic  actin  meshwork  that  persists  during  mid-oogenesis.  This  complex  actin  network  is  built  by  the  collaboration  of  actin  nucleators:  Spire  (Spir)  and  Cappuccino  (Capu).  Removal  of  the  actin  mesh,  and  the  concurrent  decrease  in  Spir  and  Capu  expression,  coincides  with  the  onset  of  fast  cytoplasmic  streaming,  mixing  cytoplasmic  contents  and  reinforcing  the  establishment  of  polarity.  Analogous  actin  meshes,  built  by  Spir  and  Capu,  have  been  characterized  in  other  systems.  The  function  of  these  networks  appears  to  differ  based  on  the  localization  of  Capu  while  the  role  of  the  Drosophila  actin  mesh,  outside  of  restricting  cytoplasmic  streaming,  remains  uncertain.  This  is  in  part,  due  to  the  current  limitations  of  imaging  the  egg  chamber  ex  vivo  during  mesh  removal  and  the  requirement  of  mesh  components  during  earlier  stages  of  development. To  better  characterize  what  the  actin  mesh  does  in  oogenesis,  we  set  out  to  generate  improved  tools  for  studying  Spir  and  Capu.  We  established  a  gene-specific  driver  for  Capu,  capu-Gal4,  that  improved  the  rescue  of  capu  null  to  90%  fertility.  Using  this  driver,  we  uncovered  evidence  of  additional  roles  for  Capu  in  development  outside  of  the  actin  mesh.  Our  attempts  to  improve  transgene  rescue  of  Spir  were  unsuccessful.  In  addition,  we  performed  genome  editing  to  endogenously  tag  Spir  and  Capu  in  Drosophila.  With  these  tools,  we  confirmed  the  expression  patterns  of  Spir  and  Capu  and  revealed  previously  undescribed  localization  in  somatic  cells.  In  addition,  we  employed  knock-down  screens  to  identify  other  genes  that  regulate  the  actin  mesh  or  interact  with  Spir.  Lastly,  we  have  made  progress  in  adapting  long  term  live  imaging  methods  to  visualize  the  removal  of  the  actin  mesh.In  sum,  this  work  contributes  new  insights  into  Drosophila  oogenesis  and  establishes  the  groundwork  for  further  developing  tools  for  the  Drosophila  research  community.  More  specifically,  it  demonstrates  that  subtle  changes  in  the  interaction  of  actin  nucleators  leads  to  the  formation  of  actin-based  structures  that  play  distinct  cellular  roles  and  exemplifies  the  need  for  scrupulous  genetic  investigations. 
■590    ▼aSchool  code:  0031.
■650  4▼aMolecular  biology
■650  4▼aEntomology
■650  4▼aBiochemistry
■650  4▼aGenetics
■653    ▼aDrosophila  oocytes
■653    ▼aCappuccino  
■653    ▼aEgg  development
■653    ▼aActin  nucleators
■653    ▼aCytoplasmic  contents
■690    ▼a0307
■690    ▼a0487
■690    ▼a0369
■690    ▼a0353
■71020▼aUniversity  of  California,  Los  Angeles▼bChemistry  0153.
■7730  ▼tDissertations  Abstracts  International▼g85-12B.
■790    ▼a0031
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162436▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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