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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Co-expression of human ABCG5 and ABCG8 in insect cells generates an androstan stimulated membrane ATPase activity.

Mutations in the ATP-binding cassette (ABC) proteins ABCG5 or ABCG8 cause sitosterolemia, a condition with increased accumulation of plant sterols. Upon high level expression of the ABCG5 and ABCG8 proteins in baculovirus-Sf9 cell expression system we found a distinct, vanadate sensitive ATPase activity in isolated membrane preparations only when the two proteins were co-expressed. This ATPase activity was significantly stimulated by the addition of certain androgen hormones and analogs, and was effectively inhibited by progesterone. Our results provide a new aspect of biochemical and functional characterization of the ABCG5/ABCG8 proteins and their possible involvement in steroid hormone transport or regulation.[1]

References

  1. Co-expression of human ABCG5 and ABCG8 in insect cells generates an androstan stimulated membrane ATPase activity. M??ller, M., Klein, I., Kop??csi, S., Remaley, A.T., Rajnav??lgyi, E., Sarkadi, B., V??radi, A. FEBS Lett. (2006) [Pubmed]
 
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