Cell adhesion molecule Echinoid associates with unconventional myosin VI/Jaguar motor to regulate cell morphology during dorsal closure in Drosophila
博士 === 國立清華大學 === 分子醫學研究所 === 96 === Echinoid (Ed) is a homophilic immunoglobulin domain-containing molecule (CAM) that localizes to adherens junctions (AJs) and cooperates with Drosophila melanogaster epithelial (DE)-cadherin to mediate cell adhesion. Here we show that Ed takes part in many process...
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ndltd-TW-096NTHU55380032016-05-18T04:12:52Z http://ndltd.ncl.edu.tw/handle/86348081971860412412 Cell adhesion molecule Echinoid associates with unconventional myosin VI/Jaguar motor to regulate cell morphology during dorsal closure in Drosophila 果蠅細胞黏著分子Echinoid和MyosinVI調控細胞形態的改變 Hui-Ping Lin 林惠苹 博士 國立清華大學 分子醫學研究所 96 Echinoid (Ed) is a homophilic immunoglobulin domain-containing molecule (CAM) that localizes to adherens junctions (AJs) and cooperates with Drosophila melanogaster epithelial (DE)-cadherin to mediate cell adhesion. Here we show that Ed takes part in many processes of dorsal closure, a morphogenetic movement driven by coordinated cell shape changes and migration of epidermal cells to cover the underlying amnioserosa. Ed is differentially expressed, appearing in epidermis but not in amnioserosa cells. Ed functions independently from the JNK signaling pathway and is required to regulate cell morphology, and for assembly of actomyosin cable, filopodial protrusion and coordinated cell migration in dorsal-most epidermal cells. The effect of Ed on cell morphology requires the presence of the intracellular domain (Edintra). Interestingly, Ed forms homodimers in vivo and Edintra monomer directly associates with unconventional (Jar) motor protein. We further show that ed genetically interacts with jar to control cell morphology. It has previously been shown that myosin VI is monomeric in vitro and that its dimeric form can associate with and travel processively along actin filaments. Thus, we propose that Ed mediates the dimerization of myosin VI/Jar in vivo which in turn regulates the reorganization and/or contraction of actin filaments to control changes in cell shape. Consistent with this, we found that ectopic ed expression in the amnioserosa induces myosin VI/Jar-dependent apical constriction of this tissue. Jui-Chou Hsu 徐瑞洲 2007 學位論文 ; thesis 59 zh-TW |
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博士 === 國立清華大學 === 分子醫學研究所 === 96 === Echinoid (Ed) is a homophilic immunoglobulin domain-containing molecule (CAM) that localizes to adherens junctions (AJs) and cooperates with Drosophila melanogaster epithelial (DE)-cadherin to mediate cell adhesion. Here we show that Ed takes part in many processes of dorsal closure, a morphogenetic movement driven by coordinated cell shape changes and migration of epidermal cells to cover the underlying amnioserosa. Ed is differentially expressed, appearing in epidermis but not in amnioserosa cells. Ed functions independently from the JNK signaling pathway and is required to regulate cell morphology, and for assembly of actomyosin cable, filopodial protrusion and coordinated cell migration in dorsal-most epidermal cells. The effect of Ed on cell morphology requires the presence of the intracellular domain (Edintra). Interestingly, Ed forms homodimers in vivo and Edintra monomer directly associates with unconventional (Jar) motor protein. We further show that ed genetically interacts with jar to control cell morphology. It has previously been shown that myosin VI is monomeric in vitro and that its dimeric form can associate with and travel processively along actin filaments. Thus, we propose that Ed mediates the dimerization of myosin VI/Jar in vivo which in turn regulates the reorganization and/or contraction of actin filaments to control changes in cell shape. Consistent with this, we found that ectopic ed expression in the amnioserosa induces myosin VI/Jar-dependent apical constriction of this tissue.
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author2 |
Jui-Chou Hsu |
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Jui-Chou Hsu Hui-Ping Lin 林惠苹 |
author |
Hui-Ping Lin 林惠苹 |
spellingShingle |
Hui-Ping Lin 林惠苹 Cell adhesion molecule Echinoid associates with unconventional myosin VI/Jaguar motor to regulate cell morphology during dorsal closure in Drosophila |
author_sort |
Hui-Ping Lin |
title |
Cell adhesion molecule Echinoid associates with unconventional myosin VI/Jaguar motor to regulate cell morphology during dorsal closure in Drosophila |
title_short |
Cell adhesion molecule Echinoid associates with unconventional myosin VI/Jaguar motor to regulate cell morphology during dorsal closure in Drosophila |
title_full |
Cell adhesion molecule Echinoid associates with unconventional myosin VI/Jaguar motor to regulate cell morphology during dorsal closure in Drosophila |
title_fullStr |
Cell adhesion molecule Echinoid associates with unconventional myosin VI/Jaguar motor to regulate cell morphology during dorsal closure in Drosophila |
title_full_unstemmed |
Cell adhesion molecule Echinoid associates with unconventional myosin VI/Jaguar motor to regulate cell morphology during dorsal closure in Drosophila |
title_sort |
cell adhesion molecule echinoid associates with unconventional myosin vi/jaguar motor to regulate cell morphology during dorsal closure in drosophila |
publishDate |
2007 |
url |
http://ndltd.ncl.edu.tw/handle/86348081971860412412 |
work_keys_str_mv |
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