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该植物 Zn/Cd/Pb/Co P1B-ATPase 的系统发生树似乎是按照植物科来构建的。

The phylogenetic tree gathering the plant Zn/Cd/Pb/Co P1B-ATPases appears to be structured according to the botanical families.

机构信息

Laboratoire des plantes extrêmophiles, centre de biotechnologie, BP 901, Hammam-Lif 2050, Tunisia.

出版信息

C R Biol. 2011 Dec;334(12):863-71. doi: 10.1016/j.crvi.2011.09.004. Epub 2011 Oct 30.

Abstract

Plant Zn/Cd/Pb/Co P1B-ATPases (HMAs) play different roles, among which are the control of metal transport from the roots to the shoot and/or from the cytoplasm into the cell vacuole. Transferring the knowledge acquired on HMAs from model species to HMAs from other species requires one to identify orthologues in these other species. Through an extensive screening of the public sequence databases, 96 plant P1B-ATPases showing orthology to any of the AtHMA1, AtHMA2, AtHMA3 or AtHMA4 isoforms were identified from 32 plant species belonging to 15 botanical families. The number of paralogues within a species varied greatly from species to species, even within a specific botanical family, suggesting that gene duplication events occurred after speciation. The phylogenetic tree gathering the Zn/Cd/Pb/Co P1B-ATPases was strongly structured according to the botanical family to which the sequences could be related to. In particular, no strict orthology relationship links the Brassicaceae HMAs to the non-Brassicaceae or the Poaceae ones. Recent data showed that the sole rice HMA characterised to date displays different functional properties from the Arabidopsis HMAs. Altogether, data suggest that it might be risky to directly transfer the knowledge acquired through the study of HMAs in model plant species to HMAs from other species.

摘要

植物 Zn/Cd/Pb/Co P1B-ATPases(HMAs)发挥着不同的作用,其中包括控制金属从根部到茎部和/或从细胞质到细胞液泡的运输。将从模式物种中获得的关于 HMAs 的知识转移到其他物种的 HMAs 中,需要在这些其他物种中识别同源物。通过对公共序列数据库的广泛筛选,从属于 15 个科的 32 个植物物种中鉴定出了 96 种植物 P1B-ATPases,它们与任何 AtHMA1、AtHMA2、AtHMA3 或 AtHMA4 同工型具有同源性。一个物种内的同源基因数量在物种之间差异很大,甚至在特定的植物科内也是如此,这表明基因复制事件发生在物种形成之后。收集 Zn/Cd/Pb/Co P1B-ATPases 的系统发育树根据序列所属的植物科强烈地构建。特别是,Brassicaceae 的 HMAs 与非 Brassicaceae 或 Poaceae 的 HMAs 之间没有严格的同源关系。最近的数据表明,迄今为止唯一被表征的水稻 HMA 与拟南芥 HMAs 的功能特性不同。总之,数据表明,直接将通过对模式植物物种中 HMAs 的研究获得的知识转移到其他物种的 HMAs 中可能存在风险。

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