상세정보
Export to Refworks부가기능
Elucidating the Role of Endocytosis in cAMP-dependent Transcription
상세 프로파일
| 자료유형 | 학위논문 |
|---|---|
| 서명/저자사항 | Elucidating the Role of Endocytosis in cAMP-dependent Transcription. |
| 개인저자 | Peng, Grace Eulan. |
| 단체저자명 | University of California, San Francisco. Cell Biology. |
| 발행사항 | [S.l.]: University of California, San Francisco., 2019. |
| 발행사항 | Ann Arbor: ProQuest Dissertations & Theses, 2019. |
| 형태사항 | 178 p. |
| 기본자료 저록 | Dissertations Abstracts International 81-04B. Dissertation Abstract International |
| ISBN | 9781687962843 |
| 학위논문주기 | Thesis (Ph.D.)--University of California, San Francisco, 2019. |
| 일반주기 |
Source: Dissertations Abstracts International, Volume: 81-04, Section: B.
Advisor: von Zastrow, Mark. |
| 이용제한사항 | This item must not be sold to any third party vendors. |
| 요약 | There is a growing body of evidence from the last decade that supports the ability of G protein-coupled receptors (GPCRs) to signal from the endosome. With examples of different subtypes (Gs, Gi, Gq) of GPCRs now recognized with this ability, we still have much to learn about the role of the endosomal signal. This work explores how endocytosis selectively promotes cAMP-dependent transcription by studying a Gs-coupled GPCR, the beta-2 adrenergic receptor (棺2AR). To begin to investigate the mechanism of how the endosome signal is selective for transcription, I utilized recently developed tools including a cAMP fluorescence biosensor, and a knock-in cell line endogenously expressing fluorescently-labeled protein kinase A catalytic subunit (PKAcat). I examined the effects of endocytic blockade on each step of the cAMP signaling cascade using primarily spinning disk confocal microscopy, genetic manipulations, biochemical and molecular biology methods. In this study we found that endocytosis greatly affected PKAcat nuclear accumulation, and that the accumulation in the nucleus was necessary for cAMP-dependent transcription of PCK1.Because this is still a relatively new area of GPCR cell biology, many questions remain unanswered, including how does endocytosis affect the functional relationship between two receptors? 棺2ARs, known to signal from the endosome, have an antagonistic relationship with the M2 muscarinic acetylcholine receptor (M2R). These Gs- and Gi-coupled receptors, respectively, control the overall cAMP produced in the cell by stimulating or inhibiting the cAMP producing enzyme. The functional relationship between these two receptors are a great example for studying the effects of endocytosis on integrative cellular signaling. This work explored the relationship between the 棺2AR and M2R both by examining the trafficking of each receptor and by registering the endosomal signal of the 棺2AR, cAMP-dependent transcription. I utilized already established imaging and molecular biology methods to probe the effect of M2R inhibition on 棺2AR-stimulated cAMP signaling. I additionally generated modified constructs complementary to existing nanobody biosensors to detect activated states of the M2R and G慣i protein. This work found that it was not necessary for M2R to undergo endocytosis in order to inhibit 棺2AR cAMP-dependent transcription. |
| 일반주제명 | Biology. |
| 언어 | 영어 |
| 바로가기 | 
: 이 자료의 원문은 한국교육학술정보원에서 제공합니다. |
