| ABAS, L., R. BENJAMINS, N. MALENICA, T. PACIOREK, J. WISNIEWSKA, J.C. MOULINIER-ANZOLA, T. SIEBERER, J. FRIML and C. LUSCHNIG. Intracellular trafficking and proteolysis of the auxin efflux facilitator PIN2 in Arabidopsis is proteasomedependent and involved in root gravitropism. Nature Cell Biology. 2006, vol. 2006, No 8, p. 249-256, 7 pp. ISSN 1465-7392. |
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@article{630450,
author = {Abas, L. and Benjamins, R. and Malenica, N. and Paciorek, T. and Wisniewska, J. and MoulinierandAnzola, J.C. and Sieberer, T. and Friml, J. and Luschnig, C.},
article_number = {8},
keywords = {auxin transport; PIN proteins; Arabidopsis; gravitropism},
language = {eng},
issn = {1465-7392},
journal = {Nature Cell Biology},
title = {Intracellular trafficking and proteolysis of the auxin efflux facilitator PIN2 in Arabidopsis is proteasomedependent and involved in root gravitropism},
volume = {2006},
year = {2006}
}
TY - JOUR
ID - 630450
AU - Abas, L. - Benjamins, R. - Malenica, N. - Paciorek, T. - Wisniewska, J. - Moulinier-Anzola, J.C. - Sieberer, T. - Friml, J. - Luschnig, C.
PY - 2006
TI - Intracellular trafficking and proteolysis of the auxin efflux facilitator PIN2 in Arabidopsis is proteasomedependent and involved in root gravitropism
JF - Nature Cell Biology
VL - 2006
IS - 8
SP - 249-256
EP - 249-256
SN - 14657392
KW - auxin transport
KW - PIN proteins
KW - Arabidopsis
KW - gravitropism
N2 - Root gravitropism describes the orientation of root growth along the gravity vector and is mediated by differential cell elongation in the root meristem. This response requires the coordinated, asymmetric distribution of the phytohormone auxin within the root meristem, and depends on the concerted activities of PIN proteins and AUX1 members of the auxin transport pathway. Here, we show that intracellular trafficking and proteasome activity combine to control PIN2 degradation during root gravitropism. Following gravi-stimulation, proteasome-dependent variations in PIN2 localization and degradation at the upper and lower sides of the root result in asymmetric distribution of PIN2. Ubiquitination of PIN2 occurs in a proteasome-dependent manner, indicating that the proteasome is involved in the control of PIN2 turnover. Stabilization of PIN2 affects its abundance and distribution, and leads to defects in auxin distribution and gravitropic responses. We describe the effects of auxin on PIN2 localization and protein levels, indicating that redistribution of auxin during the gravitropic response may be involved in the regulation of PIN2 protein.
ER -
ABAS, L., R. BENJAMINS, N. MALENICA, T. PACIOREK, J. WISNIEWSKA, J.C. MOULINIER-ANZOLA, T. SIEBERER, J. FRIML and C. LUSCHNIG. Intracellular trafficking and proteolysis of the auxin efflux facilitator PIN2 in Arabidopsis is proteasomedependent and involved in root gravitropism. \textit{Nature Cell Biology}. 2006, vol.~2006, No~8, p.~249-256, 7 pp. ISSN~1465-7392.
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