Peter Mayinger
PhD 1992 Ludwig-Maximilians University, Munich, Germany, Postdoctoral
work at UCLA, Los Angeles, USA, at ZMBH since 1996, Project Group
Leader since 2000
Phosphoinositide Signaling and Transport Processes at Membranes
- Current Research
Phosphoinositides are essential phospholipids that serve as key
regulators for various cellular processes. The level of these
signaling molecules is regulated by specific lipid kinases and
phosphatases. We have identified the Sac1 phosphoinositide phosphatase
as an important regulator of distinct steps in cellular secretion
in yeast. Sac1p seems to have compartment specific roles at the
ER and at the Golgi. At the ER Sac1p regulates the uptake of
ATP into the ER lumen, which is essential for protein translocation
and protein folding in the ER lumen. At the Golgi Sac1p regulates
vesicular transport together with the phosphatidylinositol 4-kinase
Pik1p. In addition, we study the microsomal ATP-transport system.
So far we could define this transport as a specific ADP/ATP-antiport.
And we have obtained evidence that the ATP-uptake into the ER
is directly regulated by specific phospho-inositides. One main
focus of our ongoing research is the search for targets of Sac1p-dependent
phosphoinositide signals. One such potential effector protein
is the microsomal ATP transporter. Additionally, we want to understand
how Sac1p-dependent signals are integrated within other cellular
signaling pathways.
Contact:
Dr. Peter Mayinger
Zentrum für Molekulare Biologie
Im Neuenheimer Feld 282
69120 Heidelberg
Germany
Tel: -49-6221-546823
Fax:-49-6221-545892
email: mayingerp@sun0.urz.uni-heidelberg.de
http://www.zmbh.uni-heidelberg.de/Mayinger/default.html
download this site
|
|
- Projects for a Doctoral Thesis
Characterization of components involved in microsomal ATP transport.
Search for effectors of Sac1p-dependent phosphoinositide signals.
Genetic analysis of phosphoinositide signaling pathways
Selected Publications
- Mayinger, P. and Meyer, D. I. 1993. An ATP transporter is
required for protein translocation into the yeast endo-plasmic
reticulum. EMBO J. 12, 659-666.
Mayinger, P., Bankaitis, V. A. and Meyer, D. I. 1995. Sac1p mediates
the ATP transport into yeast endoplasmic reticulum that is required
for protein translocation. J. Cell Biol. 131, 1377-1386.
- Kearns, B. G., McGee, T. D., Mayinger, P., Gevilaite, A.
Phillips, S. E., Kagiwada, S. and Bankaitis, V. A. 1997. An essential
role for diacylglycerol in protein transport from the yeast Golgi
complex. Nature 387, 101-105.
- Kochendörfer, K.-U., Then, A. R., Kearns, B. G., Bankaitis,
V. A., and Mayinger, P. 1999. Sac1p plays a crucial role in microsomal
ATP transport, which is distinct from its function in Golgi phospholipid
metabolism. EMBO J. 18, 1506-1515.
- Nicolson, T. and Mayinger, P. 2000. Reconstitution of yeast
microsomal lipid flip-flop using endogenous aminophospholipids.
FEBS Letters 476, 277-281.
|