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The influence of glycerol and chloroplast lipids on the spectral shifts of pigments associated with NADPH:protochlorophyllide oxidoreductase from Avena sativa L
Author(s) -
Klement Harald,
Oster Ulrike,
Rüdiger Wolfhart
Publication year - 2000
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(00)01887-1
Subject(s) - protochlorophyllide , chloroplast , plastid , oxidoreductase , biochemistry , avena , pigment , chemistry , in vivo , chlorophyll , enzyme , biophysics , biology , botany , organic chemistry , microbiology and biotechnology , gene
Dark‐grown angiosperm seedlings lack chlorophylls, but accumulate protochlorophyllide a complexed with the light‐dependent enzyme NADPH:protochlorophyllide oxidoreductase. Previous investigators correlated spectral heterogeneity of in vivo protochlorophyllide forms and a shift of chlorophyllide forms from 680 to 672 nm (Shibata shift) occurring after irradiation, with intact membrane structures which are destroyed by solubilization. We demonstrate here that the various protochlorophyllide forms and the Shibata shift which disappear upon solubilization are restored if the reconstituted complex is treated with plastid lipids and 80% (w/v) glycerol. We hypothesize that the lipids can form a cubic phase and that this is the precondition in vitro and in vivo for the observed spectral properties before and after irradiation.