BOUNDARY STRUCTURES ARE FORMED BY ORGANIC-COMPONENTS OF THE MURCHISON CARBONACEOUS CHONDRITE
BOUNDARY STRUCTURES ARE FORMED BY ORGANIC-COMPONENTS OF THE MURCHISON CARBONACEOUS CHONDRITE
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DOI：
10.1038/317792a0
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发表时间：
1985-01-01
期刊：
影响因子：
64.8
通讯作者：
DEAMER, DW
中科院分区：
文献类型：
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作者：
DEAMER, DW
第一个出现在地球上的细胞系统大概是由三种分子组成的：能够复制的信息存储分子，结构上由信息编码并能够提高复制速率的酶样催化剂，以及可以封装前两种分子所代表的系统的边界形成分子。封装将提供一个微环境，有利于相互作用的分子物种参与，并将进一步有助于区分这些系统根据其繁殖成功。边界结构还可以提供可用于生长和复制所需的营养分子的定向运输的渗透性。本文报道的实验集中在从碳质球粒陨石中提取的非极性分子。这些分子代表了早期地球上存在的有机物质混合物的合理模型。我们发现提取物中的某些成分具有导致边界结构形成的物理性质。
The first cellular systems to appear on the Earth were presumably assembled from three molecular species: information-storing molecules capable of replication, enzyme-like catalysts structurally encoded by that information and able to enhance replication rates, and boundary-forming molecules which could encapsulate the system represented by the first two molecular species. Encapsulation would provide a microenvironment conducive to interaction of the molecular species involved, and would further serve to differentiate such systems according to their reproductive success. Boundary structures could also provide permeability properties useful for the directed transport of nutrient molecules required for growth and replication. The experiments reported here focused on non-polar molecules extracted from carbonaceous chrondrites. Such molecules represent plausible models for the mixture of organic substances present on the early Earth. We found that certain components in the extract have physical properties which lead to the formation of boundary structures.