Proteins
Curated comments from UniProt
Type | Comment | Proteins |
---|---|---|
SGR1_ARATH | developmental stage | Constitutively expressed at low level during leaf development, but up-regulated during seed maturation and senescence, when the leaf color changes from green to yellow. |
SGR1_ARATH | 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). |
SGR1_ARATH | similarity | Belongs to the staygreen family. |
SGR1_ARATH | tissue specificity | Expressed in roots, leaves, seeds, flowers, buds, petals, sepals and siliques. |
Function
Gene Ontology
cellular component | |
---|---|
chloroplast thylakoid membrane | ECO |
molecular function | |
lyase activity | ECO |
biological process | |
chlorophyll catabolic process | ECO |
Interactions
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