南极洲东斯科舍脊两个热液喷口中病毒样颗粒的形态型。

Bacteriophage Pub Date : 2014-04-02 eCollection Date: 2014-01-01 DOI:10.4161/bact.28732
Andrew D Millard, Ian Hands-Portman, Katrin Zwirglmaier
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引用次数: 7

摘要

来自极端环境的病毒在很大程度上仍未被发现,可能蕴藏着看不见的遗传潜力。在这里,我们首先介绍了来自一个极端环境的病毒样颗粒(VLPs)的形态多样性:最近在南极洲附近南大洋东斯科舍脊发现的两个热液喷口。它们是迄今为止发现的最南端的热液遗址,并被证明是一个新的生物地理省,包含了几个新的大型动物物种和相关的微生物有机体。透射电子显微镜显示了一系列不同形态的尾状和非尾状VLP,以及一个不寻常的长杆状VLP,具有三个长丝。基于它与几种已知的古细菌病毒的遥远相似性,我们假设这是一种新的病毒形态,最有可能感染古细菌。值得注意的是,我们分析的样品中没有柠檬形或纺锤形的vlp,这些vlp以前在其他热液喷口环境中被描述过。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Morphotypes of virus-like particles in two hydrothermal vent fields on the East Scotia Ridge, Antarctica.

Morphotypes of virus-like particles in two hydrothermal vent fields on the East Scotia Ridge, Antarctica.

Morphotypes of virus-like particles in two hydrothermal vent fields on the East Scotia Ridge, Antarctica.

Morphotypes of virus-like particles in two hydrothermal vent fields on the East Scotia Ridge, Antarctica.

Viruses from extreme environments are still largely unexplored and may harbor unseen genetic potential. Here, we present a first glance at the morphological diversity of virus like particles (VLPs) from an environment that is extreme in more than one respect: two recently discovered hydrothermal vent fields on the East Scotia Ridge in the Southern Ocean near Antarctica. They are the southernmost hydrothermal sites found to date and have been shown to present a new biogeographic province, containing several new macrofaunal species and associated microbial organisms. Transmission electron microscopy revealed a range of tailed and untailed VLPs of various morphologies as well as an unusual long rod-shaped VLP with three long filaments. Based on its distant similarity with several known archaeal viruses, we hypothesize that this presents a new viral morphology that most likely infects an archaeon. Notably absent in the samples we analyzed were lemon- or spindle-shaped VLPs that have previously been described in other hydrothermal vent settings.

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