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Information on EC 4.99.1.10 - magnesium dechelatase

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IUBMB Comments
Inhibited by Ca2+, Mg2+ and especially Hg2+. SGR has very low activity with chlorophyllide a and none with chlorophyll b. It acts on chlorophyll a both in its free form and in protein complex. SGRL, on the other hand, is more active with chlorophyllide a than with chlorophyll a. The magnesium formed is scavenged by MCS (metal-chelating substance).
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The enzyme appears in viruses and cellular organisms
Synonyms
MCS, MDS, Mg-dechelatase, SGR, SGR1, SGR2, SGRL, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
chlorophyll a + 2 H+ = pheophytin a + Mg2+
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(1)
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0
chlorophyllide a + 2 H+ = pheophorbide a + Mg2+
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(2)
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0
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