ACC Deaminaz ve Mikroorganizmalar

Abstract

ACC (1-aminocyclopropane-1-carboxylate ) deaminase is a multimeric enzyme with a subunit molecular mass of approximately 35-42
kDa. Recently, it has been discovered that certain soil microorganisms contain an enzyme ACC-deaminase that hydrolyses ACC into
ammonia and α-ketobutyrate. The ACC deaminase-containing soil bacteria decrease a significant portion of the physiological damage to
plants following environmental stresses including phytopathogen infection, exposure to extremes of temperature, high salt, flooding, drought,
exposure to metals and organic contaminants, and insect predation. This enzyme has subsequently been detected in a wide range of bacterial
strains and fungi. A number of plant growth-promoting rhizobacteria (PGPR), belonging to various taxonomic groups including
Pseudomonas, contain the enzyme 1 aminocyclopropane- 1-carboxylate (ACC) deaminase. ACC deaminase from bacteria Pseudomonas
putida and Pseudomonas fluorescens, Enterobacter cloacae and, Kluyvera ascorbata, and yeast Hansenula saturnus, and fungus Penicillium
citrinum have been reported. This review provides an overview to ACC deaminase containing microorganisms.