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Results 1 - 10 of 15 > >>
EC Number
General Information
Commentary
Reference
malfunction
Mmp20-deficient mouse ameloblasts can initiate, terminate, and reinitiate the secretory stage of enamel development
metabolism
TGF-beta signaling involved in amelogenesis is partially mediated by regulating the expression of MMP20 mRNA
more
genetic defects in MMP20 are involved in the hypomaturation-type enamel defect
physiological function
dental enamel is the product of ameloblasts and requires the secretion of the three matrix proteins amelogenin, ameloblastin, and enamelin, which are hydrolyzed by MMP-20 and kallikrein 4 and removed from the matrix. Enamel formation progresses through a secretory and a maturation stage, MMP-20 is expressed during the secretory and early-maturation stages
physiological function
following the C-terminal cleavage of amelogenin by Mmp-20, co-assembly with its fragments leads to formation of nanorod structures whose properties eventually dictate the super-structural organization of enamel matrix, controlling the elongated growth of enamel apatite crystals
physiological function
in salivary gland, MMP20 is coexpressed with dentin sialophosphoprotein DSPP. The MMP20-DSPP interaction is very intense and specific, and precludes MMP20 from interacting with the other members of the small integrin-binding ligand N-linked glycoproteins
physiological function
MMP-20 is a regulator that controls the functionality of amelogenin. The capacity of amelogenin to promote nucleation and crystal growth has been shown here to increase in proportion with the extent of its proteolytic degradation by means of MMP-20
physiological function
MMP-20 is involved in the enamel formation and mineralization. The amelogenin degradation induced by MMP-20 is believed to be essential for the axial growth of enamel crystals MMP-20 activity is regulated by RUNX2, which is stimulated by BMP-2 or TGF-beta, and the odontogenic ameloblast-associated protein, ODAM, molecular mechanisms responsible for MMP-20 regulation, overview. Runx2 regulates ODAM expression, which in turn regulates MMP-20 expression and is recruited to the MMP-20 promoter. Increased MMP-20 expression accelerates amelogenin processing during enamel mineralization
physiological function
Mmp20 expression levels must be within a specific range for normal enamel development to occur. Creation of a normally thick enamel layer may occur over a wider range of Mmp20 expression levels, but acquisition of normal enamel hardness has a narrower range. Over-expression of Mmp20 results in decreased enamel hardness, this suggests that a balance exists between cleaved and full-length enamel matrix proteins that are essential for formation of a properly hardened enamel layer. High and medium expressing Mmp20 transgenes in a Mmp20 null background have significantly harder and more mineralized enamel than do low transgene expressers. When the high and medium expressing Mmp20 transgenes are present in the wild-type background, the enamel is significantly less well mineralized than normal
physiological function
MMP20 is an early enzyme, being expressed throughout the secretory stage and into earlier maturation stage of amelogenesis, an intense remodeling and degradation of the enamel matrix by proteases facilitates the enamel biomineralization, overview
Results 1 - 10 of 15 > >>