Flagellar Root-Mediated Interactions Between the Flagellar Apparatus and Cell Organelles in Green Algae
Flagellar Root-Mediated Interactions Between the Flagellar Apparatus and Cell Organelles in Green Algae
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绿藻中鞭毛装置和细胞器之间的鞭毛根介导的相互作用
DOI：
10.1007/978-3-642-69686-2_11
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发表时间：
1984
影响因子：
5.6
通讯作者：
M. Melkonian
中科院分区：
文献类型：
--
作者：
M. Melkonian
鞭毛器是一种结构和生物化学上复杂的细胞器，但它不是 Schnepf（本卷）意义上的独立隔室。它是细胞质区室的局部特化，涉及微管细胞器（轴丝）、其相关的基底装置和鞘质膜以及细胞表面成分。代谢物、大分子和 ATP 进出鞭毛器不需要穿过膜，因此从功能角度来看，鞭毛器也不是一个单独的隔室。尽管如此，它仍保持结构和功能的完整性，因此有资格作为重要的真核细胞器。有充分的证据表明，核糖体不会进入游离鞭毛，尽管在一些绿藻类群中，核糖体可能始终存在于基体内（例如，Melkonian 和 Berns 1983）。鞭毛膜也是特异性的，不会与质膜的其他区域混合（Bloodgood 1982 年评论）。对于鞭毛膜的细胞表面成分（绿藻配子、鞭毛和鳞片的性凝集素；Adair 等人 1983，Melkonian 1984）也是如此。如何防止整合膜蛋白从鞭毛膜横向扩散到质膜的其他区域尚不清楚，但覆盖过渡区的鞭毛膜可能是这样的横向扩散屏障，因为与鞭毛膜的其余部分不同，它不易受到低浓度的非离子洗涤剂的影响（Goodenough 1983）。
The flagellar apparatus is a structurally and biochemically complex cell organelle, but it is not a separate compartment in the sense of Schnepf (this vol.). It is a local specialization of the cytoplasmic compartment involving a microtubular organelle (the axoneme), its associated basal apparatus and the ensheathing plasma membrane plus cell surface components. There is exchange of metabolites, macromolecules and ATP into and out of the flagellar apparatus without requiring passage through a membrane, therefore also in functional terms the flagellar apparatus is not a separate compartment. It nevertheless maintains structural and functional integrity and therefore qualifies as an important eukaryotic cell organelle. There is good evidence that passage of ribosomes into the free flagellum does not occur, although in some green algal taxa ribosomes may be found consistently inside the basal bodies (e.g., Melkonian and Berns 1983). The flagellar membrane is also specific and does not mix with other areas of the plasma membrane (review by Bloodgood 1982). The same holds true for cell surface components of the flagellar membrane (sexual agglutinin of green algal gametes, flagellar hairs and scales; Adair et al. 1983, Melkonian 1984). How lateral diffusion of integral membrane proteins from the flagellar membrane into other areas of the plasma membrane is prevented, is unknown, but the flagellar membrane covering the transition zone may be such a lateral diffusion barrier, since it is not susceptible to low concentrations of nonionic detergents unlike the rest of the flagellar membrane (Goodenough 1983).