Pseudogenization of the chloroplast threonine (trnT-GGU) gene in the sunflower family (Asteraceae)

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Abdullah , Mehmood , F , Heidari , P , Rahim , A , Ahmed , I & Poczai , P 2021 , ' Pseudogenization of the chloroplast threonine (trnT-GGU) gene in the sunflower family (Asteraceae) ' , Scientific Reports , vol. 11 , 21122 . https://doi.org/10.1038/s41598-021-00510-4

Title: Pseudogenization of the chloroplast threonine (trnT-GGU) gene in the sunflower family (Asteraceae)
Author: Abdullah,; Mehmood, Furrukh; Heidari, Parviz; Rahim, Abdur; Ahmed, Ibrar; Poczai, Péter
Contributor: University of Helsinki, Botany
Date: 2021-10-26
Language: eng
Number of pages: 9
Belongs to series: Scientific Reports
ISSN: 2045-2322
URI: http://hdl.handle.net/10138/335902
Abstract: The chloroplast genome evolves through the course of evolution. Various types of mutational events are found within the chloroplast genome, including insertions-deletions (InDels), substitutions, inversions, gene rearrangement, and pseudogenization of genes. The pseudogenization of the chloroplast threonine (trnT-GGU) gene was previously reported in Cryptomeria japonica (Cupressaceae), Pelargonium x hortorum (Geraniaceae), and Anaphalis sinica and Leontopodium leiolepis of the tribe Gnaphalieae (Asteroideae, Asteraceae). Here, we performed a broad analysis of the trnT-GGU gene among the species of 13 subfamilies of Asteraceae and found this gene as a pseudogene in core Asteraceae (Gymnarrhenoideae, Cichorioideae, Corymbioideae, and Asteroideae), which was linked to an insertion event within the 5 ' acceptor stem and is not associated with ecological factors such as habit, habitat, and geographical distribution of the species. The pseudogenization of trnT-GGU was not predicted in codon usage, indicating that the superwobbling phenomenon occurs in core Asteraceae in which a single transfer RNA (trnT-UGU) decodes all four codons of threonine. To the best of our knowledge, this is the first evidence of a complete clade of a plant species using the superwobbling phenomenon for translation.
Subject: 1181 Ecology, evolutionary biology
1184 Genetics, developmental biology, physiology
11831 Plant biology
TRANSFER-RNA GENES
EARLY EVOLUTION
MATERNAL INHERITANCE
MAJOR CLADES
ORGANIZATION
SEQUENCE
INSERTIONS/DELETIONS
DYNAMICS
GENOMES
DNA
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