Biochemistry and genetics of ACC deaminase: a weapon to "stress ethylene" produced in plants.

摘要: 1-aminocyclopropane-1-carboxylate deaminase (ACCD), a pyridoxal phosphate dependent enzyme, is widespread in diverse bacterial and fungal species. Owing to ACCD activity, certain plant associated bacteria help grow under biotic abiotic stresses by decreasing level of 'stress ethylene' which inhibitory growth. breaks down ACC, an immediate precursor ethylene, ammonia α-ketobutyrate can be further metabolized for their ACC inducible enzyme whose synthesis induced presence its substrate ACC. This encoded gene AcdS, tight regulation regulated differentilly different environmental conditions. Regulatory elements AcdS are comprised regulatory encoding LRP protein other regulator activated differentially aerobic anaerobic Role some additional genes such as AcdB or LysR may also required expression AcdS. Phylogenetic analysis has revealed that distribution this among might have resulted from vertical transfer with occasional horizontal transfer. Application been extended developing transgenic plants showed increased tolerance plants. Moreover, homologs wide range species belonging all three domains indicate alternative role physiology organism. Therefore, review attempt explore current knowledge mediated physiological effects plants, mode action, genetics, ecological and, future research avenues develop expressing foreign cope stressors. Systemic identification circuits would highly valuable express the