ArticleAnnals of botany2010
Duplication of the class I cytosolic small heat shock protein gene and potential functional divergence revealed by sequence variations flanking the {alpha}-crystallin domain in the genus Rhododendron (Ericaceae).
Article in Annals of botany, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 9 citations in OpenAlex.
- Review
- A petunia transcription factor,Horticulture research · 2023Article
- Molecular analysis of phosphomannomutase (PMM) genes reveals a unique PMM duplication event in diverse Triticeae species and the main PMM isozymes in bread wheat tissues.BMC plant biology · 2010Article
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5 authors at 4 institutions in 1 country.
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Abstract
BACKGROUND AND
aimsPositive selection in the -crystallin domain (ACD) of the chloroplast small heat shock protein (CPsHSP) gene was found in a previous study and was suggested to be related to the ecological adaptation of Rhododendron species in the subgenus Hymenanthes. Consequently, it was of interest to examine whether gene duplication and subsequent divergence have occurred in other sHSP genes, for example class I cytosolic sHSP genes (CT1sHSPs) in Rhododendron in Taiwan, where many endemic species have evolved as a result of habitat differentiation.
methodsA phylogeny of CT1sHSP amino acid sequences was built from Rhododendron, Arabidopsis thaliana, Oryza sativa, Populus trichocarpa, Vitis vinifera and other species for elucidation of the phylogenetic relationships among CT1sHSPs. Phylogenies of Rhododendron CT1sHSP nucleotide and amino acid sequences were generated for positive selection and functional divergence analysis, respectively. Positively selected sites and amino acid differences between types of Rhododendron CT1sHSPs were mapped onto the wheat sHSP16.9 protein structure. Average genetic distance (Dxy) and dN/dS ratios between types of Rhododendron CT1sHSP genes were analysed using sliding window analysis. Gene conversion was also assessed between types of Rhododendron CT1sHSPs. KEY
resultsTwo types of Rhododendron CT1sHSP were identified. A high level of genetic similarity and diversity within and flanking the ACD, respectively, between types of Rhododendron CT1sHSP were found. Main differences between the two types of Rhododendron CT1sHSPs were: (1) increased hydrophobicity by two positively selected amino acid sites and a seven-amino-acid insertion in the N-terminal arm; and (2) increased structural flexibility and solubility by a seven-amino-acid insertion in the N-terminal arm and one positively selected amino acid site in the C-terminal extension.
conclusionsFunctional conservation of the ACD of Rhododendron CT1sHSP genes was inferred b
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