功能： disease:Defects in COL8A2 are a cause of Fuchs endothelial corneal dystrophy (FECD) [MIM:136800]. FECD is the commonest primary disorder of the corneal endothelium in developed countries. Symptoms of painful visual loss result from corneal decompensation. Signs may be present from the fourth decade of life onwards. Tipically, focal wart-like guttata arising from Descemet membrane develops in the central cornea; Descemet membrane is thickened by abnormal collagenous deposition. FECD is usually sporadic but familial highly penetrant forms showing autosomal dominant inheritance are also recognized.,disease:Defects in COL8A2 are a cause of posterior polymorphous corneal dystrophy (PPCD) [MIM:122000]. PPCD is a slowly progressive hereditary disorder of the corneal endothelium that leads to a variable degree of visual impairment usually in adulthood. PPCD is usually inherited as an autosomal dominant trait.,disease:Defects in COL8A2 are the cause of posterior polymorphous corneal dystrophy 2 (PPCD2) [MIM:609140]. PPCD is a rare bilateral familial disorder of the corneal epithelium, and is inherited in a autosomal dominant pattern. The clinical features usually present earlier than FECD, being from birth onwards. The disorder is characterized by alterations of Descemet membrane presenting as vesicles, opacities or band-like lesions on slit-lamp examination and specular microscopy. Affected patient typically are asymptomatic.,function:Major component of the Descemet membrane (basement membrane) of corneal endothelial cells.,PTM:Prolines at the third position of the tripeptide repeating unit (G-X-Y) are hydroxylated in some or all of the chains.,similarity:Contains 1 C1q domain.,subunit:May form homotrimers, or heterotrimers in association with alpha 1(VIII) type collagens.,
组织表达： Expressed primarily in the subendothelium of large blood vessels. Also expressed in arterioles and venules in muscle, heart, kidney, spleen, umbilical cord, liver and lung and is also found in connective tissue layers around hair follicles, around nerve bundles in muscle, in the dura of the optic nerve, in cornea and sclera, and in the perichondrium of cartilaginous tissues. In the kidney, expressed in mesangial cells, glomerular endothelial cells, and tubular epithelial cells. Also expressed in mast cells, and in astrocytes during the repair process. Expressed in Descemet's membrane.
功能： disease:Defects in COL8A2 are a cause of Fuchs endothelial corneal dystrophy (FECD) [MIM:136800]. FECD is the commonest primary disorder of the corneal endothelium in developed countries. Symptoms of painful visual loss result from corneal decompensation. Signs may be present from the fourth decade of life onwards. Tipically, focal wart-like guttata arising from Descemet membrane develops in the central cornea; Descemet membrane is thickened by abnormal collagenous deposition. FECD is usually sporadic but familial highly penetrant forms showing autosomal dominant inheritance are also recognized.,disease:Defects in COL8A2 are a cause of posterior polymorphous corneal dystrophy (PPCD) [MIM:122000]. PPCD is a slowly progressive hereditary disorder of the corneal endothelium that leads to a variable degree of visual impairment usually in adulthood. PPCD is usually inherited as an autosomal dominant trait.,disease:Defects in COL8A2 are the cause of posterior polymorphous corneal dystrophy 2 (PPCD2) [MIM:609140]. PPCD is a rare bilateral familial disorder of the corneal epithelium, and is inherited in a autosomal dominant pattern. The clinical features usually present earlier than FECD, being from birth onwards. The disorder is characterized by alterations of Descemet membrane presenting as vesicles, opacities or band-like lesions on slit-lamp examination and specular microscopy. Affected patient typically are asymptomatic.,function:Major component of the Descemet membrane (basement membrane) of corneal endothelial cells.,PTM:Prolines at the third position of the tripeptide repeating unit (G-X-Y) are hydroxylated in some or all of the chains.,similarity:Contains 1 C1q domain.,subunit:May form homotrimers, or heterotrimers in association with alpha 1(VIII) type collagens.,
组织表达： Expressed primarily in the subendothelium of large blood vessels. Also expressed in arterioles and venules in muscle, heart, kidney, spleen, umbilical cord, liver and lung and is also found in connective tissue layers around hair follicles, around nerve bundles in muscle, in the dura of the optic nerve, in cornea and sclera, and in the perichondrium of cartilaginous tissues. In the kidney, expressed in mesangial cells, glomerular endothelial cells, and tubular epithelial cells. Also expressed in mast cells, and in astrocytes during the repair process. Expressed in Descemet's membrane.
在线咨询
湘公网安备