Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
2052099 | FEBS Letters | 2006 | 6 Pages |
Abstract
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.
Keywords
Related Topics
Life Sciences
Agricultural and Biological Sciences
Plant Science
Authors
Marianna Müller, Izabella Klein, Szilárd Kopácsi, Alan T. Remaley, Éva Rajnavölgyi, Balázs Sarkadi, András Váradi,