检索结果-南通市图书馆

Phosphatidylglycerol-containing er-transport vesicles built and restore outer mitochondrial membrane and deliver nuclear DNA translation products to generate cardiolipin in the inner mitochondrial membrane

引用

Advances in Biological Chemistry 2012年第2期2卷 132-145页

作者： Amalia Slomiany Bronislaw L. Slomiany Research Center University of Medicine and Dentistry of New Jersey Newark USA

Phosphatidylglycerol (PG) an important membrane phospholipid required for the synthesis of diphos-phatidylglycerol (DPG) commonly known as cardiolipin (CL) was identified in the fraction of endo-plasmic reticulum (er)-derived transport vesicles which had no affinity for Golgi. The vesicles were produced in the presence of Brefeldin A (BFA), the agent known to inhibit er-Golgi transport, and found to display affinity to mitochondria. The analysis revealed that their cargo was not containing proteins that are transported to Golgi, and that their membrane was free of phosphatidylinositol (PI) and ceramides (Cer). The incubation of PG-containing transport vesicles with mitochondria afforded incorporation of their membrane into the Outer Mito-chondrial Membrane (OMM) and formation of lyso-phosphatidylglycerol (LPG). In turn, upon further incubation with fresh transport active cytosol, the mitochondrial LPG was converted to PG. The results of analysis of the OMM, Inner Mitochondrial Mem-brane (IMM) and Inner Mitochondrial Space Components (IMSC) strongly suggest that PG-containing transport vesicles deliver nuclear DNA translation products to the IMSC and thus facilitate CL synthesis in the IMM. In summary, our studies provide evidence that er-generated PG-enriched transport vesicles represent the general pathway for restitution of mitochondrial membranes and the delivery of nuclear DNA translation products that generate CL, and thus sustain the mitochondrial matrix CL-dependent metabolic reactions.

关键词： er-transport Vesicles Mitochondrial Membranes Biogenesis transport of Nuclear DNA Translation Products Cardiolipin Synthase Cell Organelles Repair

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Homeostatic cell cycle and the origin of autophagosomal vesicles

引用

Advances in Biological Chemistry 2013年第3期3卷 275-287页

作者： Amalia Slomiany Bronislaw L. Slomiany Research Center University of Medicine and Dentistry of New Jersey Newark USA

The autophagosomes were identified in the viable cycloheximide (CHX)-treated cells which had an incapacitated translational process and thus disabled synthesis of endoplasmic reticulum (er)-derived vesicular transporters. They were found devoid of the proteins transported from er to cell organelles, were unable to fuse with er, Golgi or mitochondria, and displayed affinity with lysosomes. The analysis of autophagosomes, derived from the CHX cell organelles, revealed that their lipid composition resemble that of the maternal organelle. Thus, the er-derived autophagosomes were marked with the presence of phosphatidylinositol (PI), Golgi-derived vesicles contained sphingomyelin (SM) and glycosphingolipids (GLL), and the mitochondria-derived autophagosomes contained phosphatidylglycerol (PG) and cardiolipin (CL). The incubation of the vesicles with intact lysosomes afforded their and the lysosome membrane lipids degradation. The analysis of the products derived from incubation of lysosomes and autophagosomes with radiolabeled SM, in the presence and the absence of TritonX100, allowed us to conclude that during autophagosome degradation the lysosomal enzymes are not released to cytosol, and that only lysosomes contain the enzymes degrading membrane lipids. In summary, our findings allowed us to authenticate the vesicles generated in the CHX-treated cells as organelle-specific autophagosomes and to determine that complete cycle of cell restitution and debridement includes intralysosomal degradation of the lysosomal membrane engulfing the autophagosomes vesicles.

关键词： Autophagosomes er-transport Vesicles Cell Organelle Repair Lysosomal Cell Debridement Homeostatic Cell Cycle

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：