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Prions on the move

机译:ions病毒在移动

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摘要

Prions consist mainly, if not entirely, of PrP~(Sc), an aggregated conformer of the host protein PrP~C. Prions come in different strains, all based on the same PrP~C sequence, but differing in their conformations. The efficiency of prion transmission between species is usually low, but increases after serial transmission in the new host, suggesting a process involving mutation and selection. Even within the same species, the transfer of prions between cell types entails a selection of favoured 'substrains', and propagation of prions in the presence of an inhibitory drug can result in the appearance of drug-resistant prion populations. We propose that prion populations are comprised of a variety of conformers, constituting 'quasi-species', from which the one replicating most efficiently in a particular environment is selected.
机译:ions病毒主要(如果不是全部)由宿主蛋白PrP〜C的聚集构象体PrP〜(Sc)组成。 ions病毒的菌株不同,均基于相同的PrP〜C序列,但构象不同。 species病毒在物种间的传播效率通常较低,但在新宿主中进行串行传播后会提高,这表明该过程涉及突变和选择。即使在同一物种内,病毒在细胞类型之间的转移也需要选择有利的“亚菌株”,并且在存在抑制性药物的情况下propagation病毒的繁殖可能会导致耐药drug病毒种群的出现。我们建议病毒种群由构成“准物种”的各种构象体组成,从中选择在特定环境中复制效率最高的一个。

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