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-Structure paper
タイトル | Coassembly of Mgm1 isoforms requires cardiolipin and mediates mitochondrial inner membrane fusion. |
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ジャーナル・号・ページ | J Cell Biol, Vol. 186, Issue 6, Page 793-803, Year 2009 |
掲載日 | 2009年9月21日 |
![]() | Rachel M DeVay / Lenin Dominguez-Ramirez / Laura L Lackner / Suzanne Hoppins / Henning Stahlberg / Jodi Nunnari / ![]() |
PubMed 要旨 | Two dynamin-related protein (DRP) families are essential for fusion of the outer and inner mitochondrial membranes, Fzo1 (yeast)/Mfn1/Mfn2 (mammals) and Mgm1 (yeast)/Opa1 (mammals), respectively. ...Two dynamin-related protein (DRP) families are essential for fusion of the outer and inner mitochondrial membranes, Fzo1 (yeast)/Mfn1/Mfn2 (mammals) and Mgm1 (yeast)/Opa1 (mammals), respectively. Fzo1/Mfns possess two medial transmembrane domains, which place their critical GTPase and coiled-coil domains in the cytosol. In contrast, Mgm1/Opa1 are present in cells as long (l) isoforms that are anchored via the N terminus to the inner membrane, and short (s) isoforms were predicted to be soluble in the intermembrane space. We addressed the roles of Mgm1 isoforms and how DRPs function in membrane fusion. Our analysis indicates that in the absence of a membrane, l- and s-Mgm1 both exist as inactive GTPase monomers, but that together in trans they form a functional dimer in a cardiolipin-dependent manner that is the building block for higher-order assemblies. |
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手法 | EM (電子線結晶学) |
解像度 | 24.0 Å |
構造データ | ![]() EMDB-5644: |
由来 |
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