Evolutionary and genomic analysis of the caleosin/peroxygenase (CLO/PXG) gene/protein families in the Viridiplantae

PloS One
Farzana RahmanDenis J Murphy

Abstract

Bioinformatics analyses of caleosin/peroxygenases (CLO/PXG) demonstrated that these genes are present in the vast majority of Viridiplantae taxa for which sequence data are available. Functionally active CLO/PXG proteins with roles in abiotic stress tolerance and lipid droplet storage are present in some Trebouxiophycean and Chlorophycean green algae but are absent from the small number of sequenced Prasinophyceaen genomes. CLO/PXG-like genes are expressed during dehydration stress in Charophyte algae, a sister clade of the land plants (Embryophyta). CLO/PXG-like sequences are also present in all of the >300 sequenced Embryophyte genomes, where some species contain as many as 10-12 genes that have arisen via selective gene duplication. Angiosperm genomes harbour at least one copy each of two distinct CLO/PX isoforms, termed H (high) and L (low), where H-forms contain an additional C-terminal motif of about 30-50 residues that is absent from L-forms. In contrast, species in other Viridiplantae taxa, including green algae, non-vascular plants, ferns and gymnosperms, contain only one (or occasionally both) of these isoforms per genome. Transcriptome and biochemical data show that CLO/PXG-like genes have complex patterns of develop...Continue Reading

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Citations

Oct 6, 2020·Frontiers in Plant Science·Krzysztof Zienkiewicz, Agnieszka Zienkiewicz
Aug 25, 2021·The Science of the Total Environment·Neha Arora, George P Philippidis

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Datasets Mentioned

BETA
PRJNA201497
AEO32378.1

Methods Mentioned

BETA
reverse-transcription quantitative PCR
PCR
RNA

Software Mentioned

Webscipio
BLAST +
blastp
CLC Genomics Workbench
RasMol
ClustalW
ClustalW2
ClustalOmega
Geneious
Tuxedo suite

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