N-Glycosylation of the alpha subunit does not influence trafficking or functional activity of the human organic solute transporter alpha/beta
Author Information
Author(s): Soroka Carol J, Xu Shuhua, Mennone Albert, Lam Ping, Boyer James L
Primary Institution: Yale University School of Medicine
Hypothesis
Does glycosylation of the alpha subunit affect its interaction with the beta subunit and its functional activity?
Conclusion
Glycosylation of the alpha subunit is not necessary for its interaction with the beta subunit or for the transporter’s localization and function.
Supporting Evidence
- Tunicamycin treatment showed that human OSTα is glycosylated.
- Immunofluorescence indicated that OSTα could still be expressed on the plasma membrane after tunicamycin treatment.
- Functional uptake of 3H-estrone sulfate was unchanged in the absence of N-glycosylation.
Takeaway
The alpha part of a protein called OST doesn't need sugar chains to work properly or to get to where it needs to be in the cell.
Methodology
The study used human hepatoma cells and COS7 cells to examine the effects of glycosylation on the organic solute transporter.
Limitations
The study primarily focused on specific cell lines and may not fully represent in vivo conditions.
Digital Object Identifier (DOI)
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