… germ protein expression system converted chlorophyll a to … Next, we examined the Mg-dechelating
activity of mature SGR … the resulting free chlorophylls. The other hypothesis is that …

… Both chlorophylls possess distinct absorption spectra in the blue and … which catalyzes Mg2+
dechelation from chlorophyll a. This … The Arabidopsis SGR-less mutants showed substantial …

… in Arabidopsis cells, the chlorophyll content decreased, further confirming that SGR has
Mg-dechelating activity in … Conversion of chlorophyll b to chlorophyll a is indispensable for …

… -reaction in chlorophyll b to chlorophyll a conversion. HCAR is … Here, we report the crystal
structure of Arabidopsis HCAR at 2.7-… Chlorophylls were extracted with acetone from spinach …

… Mg-dechelation activities against chlorophylls in PSI particles … the highest activity among
Arabidopsis SGRs. We propose that Mg-… The dechelation of Mg from chlorophyll b results in the …

… By testing different porphyrin substrates with recombinant pheophytinase from Arabidopsis
… intermediate of chlorophyll biosynthesis. Thus, preceding Mg-dechelation over dephytylation …

… leaf senescence, because magnesium (Mg) cannot be extracted from Chl b by Mg-… /b ratio
seems to be determined by the Chl a to b conversion in the Chl cycle. Transgenic Arabidopsis, …

… a chlorophyll b-less Arabidopsis mutant compliments its chlorophyll b deficiency, while
transformation … These observations suggest that the differential distribution of chlorophylls among …

… of chlorophylls (Chls), an enzyme called STAY-GREEN or SGR catalyzes the removal of the
central magnesium … and investigated their in vitro dechelations using an SGR enzyme. Chl-a …

… ) gene catalyzes Mg 2+ dechelation from chlorophyll a. This … the extraction of magnesium
(Mg) ion from chlorophyll a to form … functional similarity with the Arabidopsis thaliana SGR-Like (…