Tyrosine phosphorylation has been known in many bacteria since the late 90s. See for example,
Ilan, O., Bloch, Y., Frankel, G., Ullrich, H., Geider, K. & Rosenshine, I. (1999). Protein tyrosine kinases in bacterial pathogens are associated with virulence and production of exopolysaccharide. EMBO J 18, 3241–3248.
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Mark A. Saper, Ph.D.
Associate Professor of Biological Chemistry
Biophysics, University of Michigan
930 N University Ave
Ann Arbor MI 48109-1055 U.S.A.