Postdoctoral research position, Brown University

Alison Delong Alison_Delong at
Fri Jan 25 14:47:11 EST 2002


Laboratory of Alison DeLong
Brown University, Providence Rhode Island

A postdoctoral position is available for a period of up to three years
to study the role of the Arabidopsis RCN1 gene product in regulating the
activity of protein phosphatase 2A (PP2A). The RCN1 gene encodes a
regulatory A subunit of PP2A, a highly conserved heteromeric
serine/threonine phosphatase.  Loss of RCN1 function leads to reduced
PP2A activity in vivo and in vitro.  Plants carrying the rcn1 mutation
exhibit defects in differential cell elongation responses such as
gravitropism.  These growth defects are correlated with altered auxin
transport in rcn1 seedlings, and in seedlings treated with phosphatase
inhibitors, implicating PP2A activity in the regulation of auxin
transport.  Currently we seek to define the factors that specify RCN1
function and we will further characterize the role of RCN1 in regulating
auxin transport.  Candidates must have a strong background in molecular
genetics and/or biochemistry.  To apply, please send your current CV, a
letter outlining your research interests and accomplishments, and
arrange to have three letters of reference sent directly to Prof. Alison
DeLong; Dept. of Molecular Biology, Cell Biology and Biochemistry; Brown
University; Providence RI  02912; Alison_DeLong at

For additional information see
       Muday, G.K. and A. DeLong (2001) Polar auxin transport:
Controlling where and how much. Trends in Plant Science 6: 535-542.
       Rashotte, A. M., A. DeLong and G. K. Muday (2001)  Genetic and
chemical reductions in protein phosphatase activity alter auxin
transport, gravity response and lateral root growth. The Plant Cell. 13:
       Deruere, J., K. Jackson, C. Garbers, D. Soll and A. DeLong (1999)
The RCN1-encoded A subunit of protein phosphatase 2A increases
phosphatase activity in vivo. The Plant Journal 20: 389-399.
       Garbers, C., A. DeLong, J. Deruere, P. Bernasconi and D. Soll
(1996)  A mutation in Protein Phosphatase 2A Regulatory Subunit A
Affects Auxin Transport in Arabidopsis. EMBO J. 15: 2115-2124.


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