Kininogens are proteins that are defined by their role as precursors for kinins, but that also can have additional roles. Kinins are biologically active peptides, the parent form is bradykinin.
The two main kininogen types are:
High-molecular-weight kininogen (HMW), which is produced mostly by the liver but is synthesized in endothelial cells and is present in platelets and neutrophils. It acts as a cofactor for prekallikrein, factor XI, and factor XII in the coagulation and inflammation systems. It has no intrinsic enzymatic activity. These high molecular weight kininogens are cleaved into bradykinin and kallidin by tissue and plasma kallikreins.
Low-molecular-weight kininogen (LMW), which is produced locally by numerous tissues, and secreted together with tissue kallikrein.
They are both spliced from the same precursor.
CHEMICAL STRUCTURE AND IMAGES
When relevant for the function
- Primary structure
- Secondary structure
- Tertiary structure
- Quaternary structure
Protein Aminoacids Percentage
The Protein Aminoacids Percentage gives useful information on the local environment and the metabolic status of the cell (starvation, lack of essential AA, hypoxia)
Protein Aminoacids Percentage (Width 700 px)
SYNTHESIS AND TURNOVER
Interacting Proteins for KNG1 Gene
- Cell signaling and Ligand transport
- Structural proteins