Journal
PLANT CELL AND ENVIRONMENT
Volume 39, Issue 10, Pages 2329-2341Publisher
WILEY
DOI: 10.1111/pce.12755
Keywords
cyanide; cyanide detoxification; nitrilase; nitrile hydratase; beta-cyanoalanine; beta-cyanoalanine synthase
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Funding
- US-Israel Vaadia Binational Agricultural Research Development (BARD) Fund postdoctoral fellowship [FI-504-14]
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Production of cyanide through biological and environmental processes requires the detoxification of this metabolic poison. In the 1960s, discovery of the beta-cyanoalanine synthase (beta-CAS) pathway in cyanogenic plants provided the first insight on cyanide detoxification in nature. Fifty years of investigations firmly established the protective role of the beta-CAS pathway in cyanogenic plants and its role in the removal of cyanide produced from ethylene synthesis in plants, but also revealed the importance of this pathway for plant growth and development and the integration of nitrogen and sulfur metabolism. This review describes the beta-CAS pathway, its distribution across and within higher plants, and the diverse biological functions of the pathway in cyanide assimilation, plant growth and development, stress tolerance, regulation of cyanide and sulfide signalling, and nitrogen and sulfur metabolism. The collective roles of the beta-CAS pathway highlight its potential evolutionary and ecological importance in plants.
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