GA3oksidaasit

GA3oksidaasit, also known as gibberellin 3-oxidase, is an enzyme that plays a crucial role in the biosynthesis of gibberellins. Gibberellins are a class of plant hormones that regulate various aspects of plant growth and development, including stem elongation, seed germination, and flowering. GA3oksidaasit belongs to the 2-oxoglutarate-dependent dioxygenase (2-ODD) superfamily of enzymes. These enzymes utilize 2-oxoglutarate as a co-substrate and require iron ions and molecular oxygen for their catalytic activity. In plants, GA3oksidaasit catalyzes the conversion of gibberellin A12 aldehyde (GA12-aldehyde) to gibberellin A3 (GA3). This step is a key oxidative modification in the gibberellin pathway, transforming an early precursor into a biologically active gibberellin. The activity of GA3oksidaasit is tightly regulated, ensuring the proper levels of gibberellins are maintained within the plant to respond to environmental cues and developmental signals. Understanding the function and regulation of GA3oksidaasit is important for comprehending plant hormone signaling and has potential applications in agriculture for manipulating plant growth and yield. Genetic studies have identified specific genes encoding GA3oksidaasit in various plant species, and research continues to explore its precise mechanisms of action and interactions with other components of the gibberellin biosynthesis pathway.