Molybdenum (Mo) is a trace element essential for living organisms, however no molybdate transporter has been identified in eukaryotes. Here, we report the identification of a molybdate transporter, MOT1, from Arabidopsis thaliana. MOT1 is expressed in both roots and shoots, and the MOT1 protein is localized, in part, to plasma membranes and to vesicles. MOT1 is required for efficient uptake and translocation of molybdate and for normal growth under conditions of limited molybdate supply. Kinetics studies in yeast revealed that the K(m) value of MOT1 for molybdate is approximately 20 nM. Furthermore, Mo uptake by MOT1 in yeast was not affected by coexistent sulfate, and MOT1 did not complement a sulfate transporter-deficient yeast mutant strain. These data confirmed that MOT1 is specific for molybdate and that the high affinity of MOT1 allows plants to obtain scarce Mo from soil.
An Arabidopsis thaliana high-affinity molybdate transporter required for efficient uptake of molybdate from soil. Publishing Authors By Initials
An Arabidopsis thaliana high-affinity molybdate transporter required for efficient uptake of molybdate from soil. Journal Published:
PUBLICATION TYPE: Research Support, Non-U.S. Gov
Journal: Proceedings of the National Academy of Sciences of
VOLUME: 104
Page Numbers: 18807-12
Journal Abbreviation: Proc. Natl. Acad. Sci. U.S.A.
ISSN: 1091-6490
DAY: 14
MONTH: 11
YEAR: 2007
An Arabidopsis thaliana high-affinity molybdate transporter required for efficient uptake of molybdate from soil. Information
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LANGUAGE: eng
NlmUniqueID: 7505876
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AFFILIATION: Biotechnology Research Center and Graduate School of Agricultural and Life Sciences, University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
Country: United States
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MEDLINETA: Proc Natl Acad Sci U S A
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