Acc deaminase
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Acc Deaminase. Qualitative detection of ACC-deaminase activity of rhizobacteria was carried out according to modified methods of Honma and Shimomura 1978. Microorganisms able to produce ACC deaminase transform the ethylene precursor ACC into α-ketobutyrate and ammonia 12 13. Production of ACC deaminase by PGPR has an additional benefit on plants by reducing the stress inducible ethylene level in host plants Karthikeyan et al 2012. By degrading ACC within roots or in exudates thereby leading to a sink effect root-interacting bacteria are indirectly lowering ethylene level in plant roots thus stimulating root growth and modulating plant stress.
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ACC 1-aminocyclopropane-1-carboxylate deaminase activity a widespread trait in Burkholderia species and its growth-promoting effect on tomato plants. ACC-deaminase containing PGPR can regulate ethylene level in plants via its break down into α-ketobutyrate and ammonia 14 under abiotic stresses 15 16. 1-Aminocyclopropane-1-carboxylic acid ACC is a disubstituted cyclic α-amino acid in which a three-membered cyclopropane ring is fused to the C α atom of the amino acid. To study control of induction of ACC deaminase in this organism we have isolated and analyzed the cDNA of P. Upon synthesis of ACC deaminase ACC is cleaved to form ammonia and α-ketobutyrate a precursor of branched chain amino acids such as leucine and when a cell accumulates a sufficiently high level of leucine this amino acid binds to the LRP octamer causing it to dissociate into inactive dimers shutting down further transcription of acdS. Microorganisms able to produce ACC deaminase transform the ethylene precursor ACC into α-ketobutyrate and ammonia 12 13.
This enzyme catalyzes the conversion of ACC the immediate precursor of ethylene synthesis in plants to ammonia and α-ketobutyrate α-KB.
ACC deaminase ACCD catalyzes the cleavage of ACC to α-ketobutyrate and ammonia Honma and Shimomura 1978 and belongs to the tryptophan synthase β-subunit family TRPSβ of pyridoxal 5 -phosphate PLP-dependent enzymes Todorovic and Glick 2008. ACC 1-aminocyclopropane-1-carboxylate deaminase activity a widespread trait in Burkholderia species and its growth-promoting effect on tomato plants. It is synthesized by the enzyme ACC synthase EC 44114 from methionine and converted to ethylene by ACC oxidase EC 114174. A low level of ACC deaminase activity namely. This study showed that various rhizosphere bacteria producing the enzyme 1-aminocyclopropane-1-carboxylate ACC deaminase ACCD which can degrade ACC the immediate precursor of ethylene in plants and thereby lower plant ethylene levels can act. ACC plays an important role in the biosynthesis of the plant hormone ethylene.
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Microorganisms able to produce ACC deaminase transform the ethylene precursor ACC into α-ketobutyrate and ammonia 12 13. Therefore production of ACC deaminase hydrolytic enzyme could a useful tool to mitigate the plant stress caused by adverse environmental stresses including salinity. ACC deaminase is a microbial cytoplasmic enzyme that cleaves ACC a precursor of ethylene in the stressed plant. To study control of induction of ACC deaminase in this organism we have isolated and analyzed the cDNA of P. Enzyme 1-aminocyclopropane-1-carboxylate deaminase ACCD can break ACC an immediate precursor of ethylene to ammonia and α-ketobutyrate 15.
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Citrinum ACC deaminase and studied the expression of ACC deaminase mRNA in P. The genus Burkholderia includes pathogens of plants and animals and some human opportunistic pathogens such as the Burkholderia cepacia complex Bcc but most species are nonpathogenic plant. This study showed that various rhizosphere bacteria producing the enzyme 1-aminocyclopropane-1-carboxylate ACC deaminase ACCD which can degrade ACC the immediate precursor of ethylene in plants and thereby lower plant ethylene levels can act. The plants treated with ACC-deaminase producing PGPR have shown a significant improvement in stomatal conductance and photosynthesis 17. The bacterial enzyme ACC 1-aminocyclopropane-1-carboxylate deaminase promotes plant growth by lowering plant ethylene levels 37 39.
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This enzyme catalyzes the conversion of ACC the immediate precursor of ethylene synthesis in plants to ammonia and α-ketobutyrate α-KB. There are several strategies to mitigate saline stress in agriculture including treating seeds chemically and physically before they are planted as well as the use of. ACC 1-aminocyclopropane-1-carboxylate deaminase activity a widespread trait in Burkholderia species and its growth-promoting effect on tomato plants. The plants treated with ACC-deaminase producing PGPR have shown a significant improvement in stomatal conductance and photosynthesis 17. In addition ACC deaminase EC 41994 which degrades ACC to 2-oxobutyrate and ammonia was also purified from this strain.
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Qualitative detection of ACC-deaminase activity of rhizobacteria was carried out according to modified methods of Honma and Shimomura 1978. Production of ACC deaminase by PGPR has an additional benefit on plants by reducing the stress inducible ethylene level in host plants Karthikeyan et al 2012. It is synthesized by the enzyme ACC synthase EC 44114 from methionine and converted to ethylene by ACC oxidase EC 114174. 1-Aminocyclopropane-1-carboxylic acid ACC is a disubstituted cyclic α-amino acid in which a three-membered cyclopropane ring is fused to the C α atom of the amino acid. By degrading ACC within roots or in exudates thereby leading to a sink effect root-interacting bacteria are indirectly lowering ethylene level in plant roots thus stimulating root growth and modulating plant stress.
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Microorganisms able to produce ACC deaminase transform the ethylene precursor ACC into α-ketobutyrate and ammonia 12 13. Production of ACC deaminase by PGPR has an additional benefit on plants by reducing the stress inducible ethylene level in host plants Karthikeyan et al 2012. A low level of ACC deaminase activity namely. ACC Deaminase production ACC-deaminase activity of rhizobacteria was determined qualitatively by using yeast carbon base medium containing ACC as sole nitrogen source. Upon synthesis of ACC deaminase ACC is cleaved to form ammonia and α-ketobutyrate a precursor of branched chain amino acids such as leucine and when a cell accumulates a sufficiently high level of leucine this amino acid binds to the LRP octamer causing it to dissociate into inactive dimers shutting down further transcription of acdS.
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