Anti-Sucrose-Phosphate Synthase, Plant antibody

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

Sucrose-Phosphate Synthase (SPS) also known by its alternate names such as sucrose synthase or sucrose phosphate phosphatase is an enzyme that plays a central role in plants' sucrose biosynthesis. SPS catalyzes the conversion of fructose-6-phosphate and UDP-glucose to sucrose-6-phosphate a two-step reaction important for creating sucrose. The molecular mass of SPS varies depending on the plant species and isoform typically ranging from 120 to 140 kDa. This enzyme mainly expresses in photosynthetically active tissues like leaves where it supports the synthesis and storage of carbohydrates.

Biological function summary

The enzyme sucrose-phosphate synthase participates significantly in photosynthetic carbon partitioning. As part of the multi-enzyme complex for sucrose metabolism SPS assists in regulating the flow of carbon between storage and structural carbohydrates. Its activity affects the allocation of fixed carbon during photosynthesis influencing plant growth and development. Changes in SPS activity can shift sucrose allocation impacting plant energy distribution which is particularly important in conditions requiring rapid energy or growth responses.

Pathways

Sucrose-phosphate synthase is vital to the sucrose biosynthesis pathway and connects to other pathways such as glycolysis. Through its role SPS connects with enzymes like fructose-bisphosphate aldolase and UDP-glucose pyrophosphorylase. Changes in SPS activity can alter the balance between glycolysis and carbohydrate storage pathways demonstrating its significant regulatory role in plant metabolism. In these pathways SPS helps balance energy production and storage which is essential for adapting to varying environmental conditions.

Sucrose-phosphate synthase is mainly related to stress response rather than direct correlation with specific diseases. Variations in SPS activity can impact plant responses to abiotic stresses such as drought and cold which affect plant survival and productivity. The enzyme's relationship with stress-responsive proteins including those involved in signaling pathways like abscisic acid-related proteins highlights its role in adaptive responses. Understanding these interactions can inform agricultural practices and improve crop resistance to environmental stresses.