WAK meaning in Medical ?

Answer: What is Wall-Associated Kinase mean?

Wall-associated kinases (WAKs) are one of many classes of plant proteins known to serve as a medium between the extracellular matrix (ECM) and cytoplasm of cell walls. They are serine-threonine kinases that contain epidermal growth factor (EGF) repeats, a cytoplasmic kinase and are located in the cell walls. They provide a linkage between the inner and outer surroundings of cell walls. WAKs are under a group of receptor-like kinases (RLK) that are actively involved in sensory and signal transduction pathways especially in response to foreign attacks by pathogens and in cell development. On the other hand, pectins are an abundant group of complex carbohydrates present in the primary cell wall that play roles in cell growth and development, protection, plant structure and water holding capacity.

Cell wall associated kinases are receptor-like protein kinases, found in plant cell walls, that have the capability to transmit signals directly by their cytoplasmic kinase domains. They usually link the plasma membrane to the protein and carbohydrate that composed the cell wall. The receptor-like proteins contain a cytoplasmic serine threonine kinase and a less conserved region; bound to the cell wall and contains a series of epidermal growth factor repeats. WAKs are found in various plants and crops like rice, and maize. In plants genome like Arabidopsis, WAKs, are encoded by five highly similar genes clustered in a 30-kb locus, among them WAK1 & WAK2 are highly distributed. They are primarily involved in regulating plant cell wall functions including cell expansion, bind as well as response to pectins, pathogen response and also protects plants from detrimental effects.

Pectins are rich in galacturonic acids (OGs) and present in the middle lamellae in plant tissues where they provide strength, flexibility and adhesion between plant cells. Commercially and within the food industry, they are used as gels and stabilizers for desserts and juices. The role of WAKs in cell walls as pectin receptors is vital to a variety of functions involved with cell differentiation, form and host-pathogen relations.

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