NDLI: Horizontal Gene Transfer of Phytochelatin Synthases from Bacteria to Extremophilic Green Algae

Content Provider	Springer Nature Link
Author	Olsson, Sanna Penacho, Vanessa Puente Sánchez, Fernando Díaz, Silvia Gonzalez Pastor, José Eduardo Aguilera, Angeles
Copyright Year	2016
Abstract	Transcriptomic sequencing together with bioinformatic analyses and an automated annotation process led us to identify novel phytochelatin synthase (PCS) genes from two extremophilic green algae (Chlamydomonas acidophila and Dunaliella acidophila). These genes are of intermediate length compared to known PCS genes from eukaryotes and PCS-like genes from prokaryotes. A detailed phylogenetic analysis gives new insight into the complicated evolutionary history of PCS genes and provides evidence for multiple horizontal gene transfer events from bacteria to eukaryotes within the gene family. A separate subgroup containing PCS-like genes within the PCS gene family is not supported since the PCS genes are monophyletic only when the PCS-like genes are included. The presence and functionality of the novel genes in the organisms were verified by genomic sequencing and qRT-PCR. Furthermore, the novel PCS gene in Chlamydomonas acidophila showed very strong induction by cadmium. Cloning and expression of the gene in Escherichia coli clearly improves its cadmium resistance. The gene in Dunaliella was not induced, most likely due to gene duplication.
Starting Page	50
Ending Page	60
Page Count	11
File Format	PDF
ISSN	00953628
Journal	Microbial Ecology
Volume Number	73
Issue Number	1
e-ISSN	1432184X
Language	English
Publisher	Springer US
Publisher Date	2016-09-03
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Heavy metal tolerance Cadmium Acidophile Chlamydomonas acidophila Dunaliella acidophila Microbiology Ecology Microbial Ecology Geoecology/Natural Processes Nature Conservation Water Quality/Water Pollution
Content Type	Text
Resource Type	Article
Subject	Soil Science Ecology Ecology, Evolution, Behavior and Systematics

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