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[6A8 cDNA encodes A type of alpha-mannosidase]
1Department of Immunology, Insitutute of Basic Medical Sciences, CAMS and PUMC, Beijing 100005.
Summary
The protein from 6A8 cDNA appears to be an alpha-mannosidase. This enzyme, recognized by mAb 6A8, affects Concanavalin A (Con A) binding to cells.
Area of Science:
- Molecular Biology
- Glycobiology
- Enzymology
Context:
- Alpha-mannosidases are crucial enzymes involved in glycoprotein processing.
- Oligosaccharide trimming by alpha-mannosidases impacts cellular functions.
- The specific function of the protein encoded by 6A8 cDNA was previously unknown.
Purpose:
- To elucidate the biochemical nature of the protein encoded by 6A8 cDNA.
- To investigate the role of the 6A8 protein in glycoprotein modification.
- To determine if the 6A8 protein is an alpha-mannosidase.
Summary:
- Cells were transfected with sense or antisense 6A8 cDNA, altering the expression of the 6A8 protein.
- Concanavalin A (Con A) binding, which targets mannose residues, was assessed using laser scan confocal microscopy.
- Transfection with sense 6A8 cDNA decreased Con A binding, while antisense transfection increased it, suggesting the 6A8 protein interacts with mannose-containing structures.
Impact:
- The findings suggest that the protein encoded by 6A8 cDNA is an alpha-mannosidase recognized by the mAb 6A8 antibody.
- This identification provides a new tool for studying glycoprotein metabolism and the function of alpha-mannosidases.
- Understanding the role of this specific alpha-mannosidase can have implications for diseases associated with glycoprotein defects.