Recombinant Human UCMA protein

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

UCMA also known as Upper Zone of Growth Plate and Cartilage Matrix Associated protein or GRP is a protein with a molecular mass of approximately 16 kDa. This protein finds expression mainly in cartilage tissue particularly within the growth plate. UCMA consists of a gamma-carboxyglutamic acid (Gla) domain which aids in its ability to bind calcium ions. The protein undergoes post-translational modifications that are important for its function and it exists primarily in the extracellular matrix of cartilage.

Biological function summary

UCMA plays an important role in the regulation of mineralization in cartilage. It does not operate as part of a larger protein complex but functions independently. UCMA is involved in the inhibition of hydroxyapatite formation thereby affecting the mineral content within cartilage. Its activity helps maintain balance between cartilage mineralization and maintenance. Without proper regulation by proteins like UCMA cartilage could experience abnormal calcification.

Pathways

UCMA is implicated in the bone morphogenetic protein (BMP) signaling pathway which is essential for bone growth and cartilage development. Within this cascade proteins such as BMP2 interact with UCMA highlighting its role in skeletal development. Another pathway that involves UCMA is the regulation of chondrocyte differentiation. Chondrocytes are the cells responsible for cartilage formation and UCMA influences their maturation process through these pathways.

UCMA has shown associations with osteoarthritis and chondrodysplasia. Osteoarthritis involves the degeneration of joint cartilage and can be affected by the regulation of mineralization controlled by UCMA. Chondrodysplasia characterized by abnormal cartilage and bone development also connects to UCMA's role in these processes. Proteins such as MMP-13 which play roles in cartilage breakdown are functionally connected to UCMA indicating its significance in maintaining cartilage integrity and contributing to disease development.