Studies on the function of TM20, a transmembrane protein present in cereal embryos.

Publisher: Springer-Verlag [etc.] Country of Publication: Germany NLM ID: 1250576 Publication Model: Print-Electronic Cited Medium: Print ISSN: 0032-0935 (Print) Linking ISSN: 00320935 NLM ISO Abbreviation: Planta Subsets: MEDLINE

Original Publication: Berlin, New York, Springer-Verlag [etc.]

Membrane Proteins/*metabolism ; Plant Proteins/*metabolism ; Zea mays/*embryology ; Zea mays/*metabolism; Amino Acid Sequence ; Animals ; Cell Differentiation ; Gene Expression Regulation, Developmental ; Gene Expression Regulation, Enzymologic ; Gene Expression Regulation, Plant ; Immunohistochemistry ; Membrane Proteins/chemistry ; Membrane Proteins/immunology ; Molecular Sequence Data ; Oocytes/metabolism ; Plant Proteins/chemistry ; Plant Proteins/immunology ; Sequence Homology, Amino Acid ; Xenopus laevis ; Zea mays/cytology

The possible function of the maize transmembrane protein TM20 in hormone transport has been investigated using immunological methods and by microinjection of TM20 cRNA in Xenopus oocytes. The existence of a similar gene in rice indicates that the overall structure of the deduced protein is conserved between these two cereals. An antibody raised against a conserved motif, in a loop between two transmembrane domains, locates the protein (TM20) in differentiating provascular cells in maize embryo. The protein has a polarized distribution within the cell in the most differentiated stages of development. Xenopus laevis oocytes microinjected with TM20 appear to modify transport activities across the plasma membrane. These results are discussed in relation to other transport proteins that influence plant development.

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0 (Membrane Proteins)
0 (Plant Proteins)
0 (TM20 protein, Zea mays)

Date Created: 20050420 Date Completed: 20060123 Latest Revision: 20181113

20240628

10.1007/s00425-005-1519-3

15838668