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Evidence suggesting protein tyrosine phosphorylation in plants depends on the developmental conditions
Author(s) -
Barizza Elisabetta,
Lo Schiavo Fiorella,
Terzi Mario,
Filippini Francesco
Publication year - 1999
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(99)00272-0
Subject(s) - phosphorylation , tyrosine phosphorylation , tyrosine , protein phosphorylation , biology , microbiology and biotechnology , somatic embryogenesis , protein tyrosine phosphatase , signal transduction , somatic cell , biochemistry , sh2 domain , phosphorylation cascade , embryo , embryogenesis , protein kinase a , gene
Protein tyrosine phosphorylation plays a central role in a variety of signal transduction pathways regulating animal cell growth and differentiation, but its relevance and role in plants are controversial and still largely unknown. We report here that a large number of proteins from all plant subcellular fractions are recognized by recombinant, highly specific, anti‐phosphotyrosine antibodies. Protein tyrosine phosphorylation patterns vary among different adult plant tissues or somatic embryo stages and somatic embryogenesis is blocked in vivo by a cell‐permeable tyrosyl‐phosphorylation inhibitor, demonstrating the involvement of protein tyrosine phosphorylation in control of specific steps in plant development.