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SGR1

Gene
SGR1
Protein
Strictosidine-O-beta-D-glucosidase
Organism
Rauvolfia serpentina
Length
532 amino acids
Function
Glucosidase specifically involved in alkaloid biosynthesis leading to the accumulation of several alkaloids, including ajmaline, an important plant-derived pharmaceutical used in the therapy of heart disorders.
Similarity
Belongs to the glycosyl hydrolase 1 family.
Mass
60.881 kDa
Sequence
MDNTQAEPLVVAIVPKPNASTEHTNSHLIPVTRSKIVVHRRDFPQDFIFGAGGSAYQCEGAYNEGNRGPSIWDTFTQRSPAKISDGSNGNQAINCYHMYKEDIKIMKQTGLESYRFSISWSRVLPGGRLAAGVNKDGVKFYHDFIDELLANGIKPSVTLFHWDLPQALEDEYGGFLSHRIVDDFCEYAEFCFWEFGDKIKYWTTFNEPHTFAVNGYALGEFAPGRGGKGDEGDPAIEPYVVTHNILLAHKAAVEEYRNKFQKCQEGEIGIVLNSMWMEPLSDVQADIDAQKRALDFMLGWFLEPLTTGDYPKSMRELVKGRLPKFSADDSEKLKGCYDFIGMNYYTATYVTNAVKSNSEKLSYETDDQVTKTFERNQKPIGHALYGGWQHVVPWGLYKLLVYTKETYHVPVLYVTESGMVEENKTKILLSEARRDAERTDYHQKHLASVRDAIDDGVNVKGYFVWSFFDNFEWNLGYICRYGIIHVDYKSFERYPKESAIWYKNFIAGKSTTSPAKRRREEAQVELVKRQKT

Gene
SGR1
Protein
Protein STAY-GREEN 1, chloroplastic
Organism
Solanum lycopersicum
Length
272 amino acids
Function
Required to trigger chlorophyll degradation during leaf senescence and fruit ripening (PubMed:18359841, Ref.3, PubMed:23406468). Binds directly PSY1 to regulate the accumulation of lycopene and beta-carotene in the maturing fruits (PubMed:23406468).
Similarity
Belongs to the staygreen family.
Mass
30.533 kDa
Sequence
MGTLTTSLVVPSKLNNEQQSSIFIHKTRRKCKKNQSIVPVARLFGPAIFEASKLKVLFLGVDEEKHPGKLPRTYTLTHSDITSKLTLAISQTINNSQLQGWYNRLQRDEVVAEWKKVKGKMSLHVHCHISGGHFMLDLFARLRNYIFCKELPVVLKAFVHGDENLLRNYPELQEALVWVYFHSNIQEFNKVECWGPLRDATSPSSSSGGVGGVKSTSFTSNSNKKWELPKPCEEACACCFPPVSVMPWLSSNLDGVGEENGTIQQGLQEQQS

Gene
SGR1
Protein
Magnesium dechelatase SGR1, chloroplastic
Organism
Arabidopsis thaliana
Length
268 amino acids
Function
Magnesium chelatase involved in chlorophyll a degradation in the chlorophyll-protein complexes of photosystem I (PSI) and photosystem II (PSII) (PubMed:27604697). Contributes to the degradation of PSI and PSII in the thylakoid membranes (PubMed:27604697). Required to trigger chlorophyll degradation during natural and dark-induced leaf senescence (Probable) (PubMed:17468209). Mediates chlorophyll degradation during embryo degreening (PubMed:24043799, PubMed:28873256). Recombinant SGR1 possesses high dechelating activity against chlorophyll a, very low activity against chlorophyllide a, and no activity against chlorophyll b (PubMed:27604697). Magnesium dechelation of chlorophyll a by SGR1 activates chlorophyll b degradation by inducing the expression of NYC1, an enzyme involved in chlorophyll b degradation (PubMed:29425814).
Similarity
Belongs to the staygreen family.
Mass
30.052 kDa
Sequence
MCSLSAIMLLPTKLKPAYSDKRSNSSSSSSLFFNNRRSKKKNQSIVPVARLFGPAIFESSKLKVLFLGVDEKKHPSTLPRTYTLTHSDITAKLTLAISQSINNSQLQGWANRLYRDEVVAEWKKVKGKMSLHVHCHISGGHFLLDLFAKFRYFIFCKELPVVLKAFVHGDGNLLNNYPELQEALVWVYFHSNVNEFNKVECWGPLWEAVSPDGHKTETLPEARCADECSCCFPTVSSIPWSHSLSNEGVNGYSGTQTEGIATPNPEKL