Genome-Wide Identification, Evolution, and Expression Analysis of RING Finger Gene Family in Solanum lycopersicum

Area of Science:

• Plant molecular biology
• Genomics
• Biochemistry

Background:

• RING domain proteins possess E3 ubiquitin ligase activity, regulating protein degradation.
• Their roles in plant growth, development, and stress responses are well-documented in many species, but not extensively in tomatoes.
• Understanding these proteins in tomatoes is crucial for crop improvement and stress resilience.

Purpose of the Study:

• To conduct a comprehensive identification and characterization of the RING gene family in the tomato genome.
• To investigate the evolutionary history and functional divergence of tomato RING genes.
• To analyze the expression patterns of tomato RING genes under salt stress.

Main Methods:

• Bioinformatic analysis to identify 469 potential RING domain proteins in the tomato genome.
• Phylogenetic analysis and conserved motif identification for gene classification.
• Comparative syntenic analysis to infer evolutionary relationships.
• Transcriptomic analysis and RT-qPCR to study gene expression under salt treatment.

Main Results:

• Identified 469 potential RING proteins encoded by 474 RING domains across 12 tomato chromosomes.
• Phylogenetic analysis revealed 11 distinct gene groups, with segmental duplication as a key driver of family expansion.
• Most identified tomato RING genes displayed tissue-specific expression and were significantly upregulated by salt treatment.
• Comparative syntenic analysis indicated functional divergence and negative selection acting on these genes during evolution.

Conclusions:

• This study presents the first comprehensive analysis of the RING gene family in tomato.
• The findings provide insights into the evolution, classification, and stress-responsive functions of tomato RING genes.
• Results lay the foundation for future research into the specific roles and applications of these genes in tomato.