P08123
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UniProt Secondary Accession #
UniProt Related Accession #
NCBI Official Full Name
type I collagen
NCBI Official Synonym Full Names
collagen, type I, alpha 2
NCBI Official Synonym Symbols
NCBI Protein Information
collagen alpha-2(I) chain; collagen alpha-2(I) chain; OTTHUMP00000192906; type I procollagen; alpha 2(I)-collagen; alpha-2 type I collagen; collagen I, alpha-2 polypeptide; collagen of skin, tendon and bone, alpha-2 chain
UniProt Protein Name
Collagen alpha-2(I) chain
UniProt Synonym Protein Names
Alpha-2 type I collagen
UniProt Entry Name
CO1A2_HUMAN
NCBI Summary for COL1A2
This gene encodes the pro-alpha2 chain of type I collagen whose triple helix comprises two alpha1 chains and one alpha2 chain. Type I is a fibril-forming collagen found in most connective tissues and is abundant in bone, cornea, dermis and tendon. Mutations in this gene are associated with osteogenesis imperfecta types I-IV, Ehlers-Danlos syndrome type VIIB, recessive Ehlers-Danlos syndrome Classical type, idiopathic osteoporosis, and atypical Marfan syndrome. Symptoms associated with mutations in this gene, however, tend to be less severe than mutations in the gene for the alpha1 chain of type I collagen (COL1A1) reflecting the different role of alpha2 chains in matrix integrity. Three transcripts, resulting from the use of alternate polyadenylation signals, have been identified for this gene. [provided by R. Dalgleish]
UniProt Comments for COL1A2
Function: Type I collagen is a member of group I collagen (fibrillar forming collagen).
Subunit structure: Trimers of one alpha 2(I) and two alpha 1(I) chains.
Subcellular location: Secreted › extracellular space › extracellular matrix
Tissue specificity: Forms the fibrils of tendon, ligaments and bones. In bones the fibrils are mineralized with calcium hydroxyapatite.
Post-translational modification: Prolines at the third position of the tripeptide repeating unit (G-X-Y) are hydroxylated in some or all of the chains.
Involvement in disease: Defects in COL1A2 are the cause of Ehlers-Danlos syndrome type 7B (EDS7B) [
MIM:130060]. EDS is a connective tissue disorder characterized by hyperextensible skin, atrophic cutaneous scars due to tissue fragility and joint hyperlaxity. EDS7B is marked by bilateral congenital hip dislocation, hyperlaxity of the joints, and recurrent partial dislocations. Ref.8 Ref.9 Ref.28Defects in COL1A2 are a cause of osteogenesis imperfecta type 1 (OI1) [
MIM:166200]. A dominantly inherited connective tissue disorder characterized by bone fragility and blue sclerae. Osteogenesis imperfecta type 1 is non-deforming with normal height or mild short stature, and no dentinogenesis imperfecta. Ref.33 Ref.38 Ref.54 Ref.62 Ref.63Defects in COL1A2 are a cause of osteogenesis imperfecta type 2A (OI2A) [
MIM:166210]; also known as osteogenesis imperfecta congenita (OIC) or lethal perinatal. A connective tissue disorder characterized by bone fragility, with many perinatal fractures, severe bowing of long bones, undermineralization, and death in the perinatal period due to respiratory insufficiency.Defects in COL1A2 are the cause of Ehlers-Danlos syndrome autosomal recessive cardiac valvular form (EDSCV) [
MIM:225320]. A connective tissue disorder characterized by hyperextensible skin, atrophic cutaneous scars due to tissue fragility and joint hyperlaxity. In addition to joint laxity, skin hyperextensibility and friability, and abnormal scar formation, patients have mitral valve prolapse and insufficiency, mitral regurgitation, and aortic insufficiency.Defects in COL1A2 are a cause of osteogenesis imperfecta type 3 (OI3) [
MIM:259420]. A connective tissue disorder characterized by progressively deforming bones, very short stature, a triangular face, severe scoliosis, grayish sclera, and dentinogenesis imperfecta.Defects in COL1A2 are a cause of osteogenesis imperfecta type 4 (OI4) [
MIM:166220]; also known as osteogenesis imperfecta with normal sclerae. A connective tissue disorder characterized by moderately short stature, mild to moderate scoliosis, grayish or white sclera and dentinogenesis imperfecta.Note=A chromosomal aberration involving COL1A2 may be a cause of lipoblastomas, which are benign tumors resulting from transformation of adipocytes, usually diagnosed in children. Translocation t(7;8)(p22;q13) with PLAG1.
Sequence similarities: Belongs to the fibrillar collagen family.Contains 1 fibrillar collagen NC1 domain.
Research Articles on COL1A2
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Products associated with anti-COL1A2 antibody
Pathways associated with anti-COL1A2 antibody
Diseases associated with anti-COL1A2 antibody
Organs/Tissues associated with anti-COL1A2 antibody
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