Zinc Finger Proteins in Plant Stress Responses

Zinc finger proteins constitute one of the largest families of plant transcriptional regulators, characterised by conserved motifs that coordinate zinc ions to stabilise their fold and nucleic acid-binding surfaces. Among the various types, C2H2 and CCCH motifs are most prevalent in plants, where they fine-tune gene expression and RNA metabolism under both normal and adverse conditions. In response to drought, salinity, temperature extremes and oxidative stress, specific zinc finger proteins recognise promoter elements of stress-responsive genes or associate with mRNAs to modulate stability and translation. Through these actions they orchestrate adaptive programmes such as stomatal closure, osmolyte accumulation, antioxidant defence and delayed senescence. Advances in genome sequencing and functional genomics have uncovered large gene families in model and crop species, revealing subfamily-specific expression patterns, domain architectures and interaction partners. Functional analyses demonstrate that overexpression or knockdown of single zinc finger genes can enhance or impair tolerance, underlining their potential as targets for molecular breeding. Recent structural studies have also shed light on nuclear–cytoplasmic trafficking of tandem zinc finger proteins, linking stress signals to post-transcriptional control. Collectively, zinc finger proteins emerge as versatile nodes in plant stress signalling networks, integrating upstream cues and effecting transcriptional and post-transcriptional responses that underpin resilience and yield stability.

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Zinc Finger Proteins in Plant Stress Responses publication trend

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Technical terms

Zinc finger protein: A class of proteins with one or more zinc-coordinated motifs that stabilise their fold, enabling specific binding to DNA or RNA and regulation of gene expression.

CCCH zinc finger: A variant zinc finger motif defined by three cysteines and one histidine, often involved in RNA binding, mRNA turnover and stress-related post-transcriptional regulation.

Transcription factor: A protein that binds specific DNA sequences to control the transcription of genetic information from DNA to messenger RNA.

Abiotic stress: Non-living environmental factors such as drought, salinity, extreme temperatures and oxidative stress that adversely affect plant growth and productivity.

References

1. OfWRKY17-OfC3H49 module responding to high ambient temperature delays flowering via inhibiting OfSOC1B expression in Osmanthus fragrans. Horticulture Research (2024).
2. A LlMYB305-LlC3H18-LlWRKY33 module regulates thermotolerance in lily. Molecular Horticulture (2023).
3. The Roles of CCCH Zinc-Finger Proteins in Plant Abiotic Stress Tolerance. International Journal of Molecular Sciences (2021).
4. The Arabidopsis Tandem Zinc Finger Protein AtTZF1 Traffics between the Nucleus and Cytoplasmic Foci and Binds Both DNA and RNA. Plant Physiology (2009).