ArticleFrontiers in plant science2017
Divergence and Conservative Evolution of XTNX Genes in Land Plants.
Article in Frontiers in plant science, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 15 citations in OpenAlex.
- Molecular mechanisms of plant NLR activation and signalling.The Plant journal : for cell and molecular biology · 2026Review
- TheProceedings of the National Academy of Sciences of the United States of America · 2025Article
- Convergent reduction of immune receptor repertoires during plant adaptation to diverse special lifestyles and habitats.Nature plants · 2025Article
- Jasmonate signaling drives defense responses against Alternaria alternata in chrysanthemum.BMC genomics · 2023Article
- Jasmonates Coordinate Secondary with Primary Metabolism.Metabolites · 2023Review
- Variation in plant Toll/Interleukin-1 receptor domain protein dependence on ENHANCED DISEASE SUSCEPTIBILITY 1.Plant physiology · 2023Article
- Molecular innovations in plant TIR-based immunity signaling.The Plant cell · 2022Review
- Metabolism, signaling, and transport of jasmonates.Plant communications · 2021Review
- Genome-Wide Identification and Evolutionary Analysis ofFrontiers in genetics · 2020Article
- Genome- Wide Analysis of the Nucleotide Binding Site Leucine-Rich Repeat Genes of Four Orchids Revealed Extremely Low Numbers of Disease Resistance Genes.Frontiers in genetics · 2019Article
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Authors and funding
8 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The Toll-interleukin-1 receptor (TIR) and Nucleotide-binding site (NBS) domains are two major components of the TIR-NBS-leucine-rich repeat family plant disease resistance genes. Extensive functional and evolutionary studies have been performed on these genes; however, the characterization of a small group of genes that are composed of atypical TIR and NBS domains, namely XTNX genes, is limited. The present study investigated this specific gene family by conducting genome-wide analyses of 59 green plant genomes. A total of 143 XTNX genes were identified in 51 of the 52 land plant genomes, whereas no XTNX gene was detected in any green algae genomes, which indicated that XTNX genes originated upon emergence of land plants. Phylogenetic analysis revealed that the ancestral XTNX gene underwent two rounds of ancient duplications in land plants, which resulted in the formation of clades I/II and clades IIa/IIb successively. Although clades I and IIb have evolved conservatively in angiosperms, the motif composition difference and sequence divergence at the amino acid level suggest that functional divergence may have occurred since the separation of the two clades. In contrast, several features of the clade IIa genes, including the absence in the majority of dicots, the long branches in the tree, the frequent loss of ancestral motifs, and the loss of expression in all detected tissues of
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