Table 3.1: © Review
"Functions and Regulation of Plant ß-1,3-Glucanases (PR-2)"
by Leubner-Metzger and Meins (1999).
(a) Classification according to amino acid sequence identity of the mature
(b) Nicotiana tabacum (Nt); N. plumbaginifolia (Np); T and
S refer to the N. tometosiformis and N. sylvestris progenitors
of tobacco, respectively.
(c) Approximate molecular weight of mature protein; Selected values from
the literature, which might differ between publications.
(d) Amino acid sequence identity to tobacco ßGLU I enzymes of the
N. plumbaginifolia enzymes is ca. 98 % for Gn2, but only ca. 76
% for Gn1.
(e) Not induced by pathogens, i.e. a "PR-like protein".
(f) Tag1 is assigned to a new class, since it shares only 37-38 % amino
sequence identity to Gla, PR-2, and PR-Q'.