ID 6.6.1.1 DE magnesium chelatase. AN magnesium-chelatase. AN magnesium-protoporphyrin chelatase. AN magnesium-protoporphyrin IX chelatase. AN Mg-chelatase. AN Mg-protoporphyrin IX chelatase. AN Mg-protoporphyrin IX magnesio-lyase. AN protoporphyrin IX magnesium-chelatase. AN protoporphyrin IX Mg-chelatase. CA ATP + H2O + Mg(2+) + protoporphyrin IX = ADP + 3 H(+) + Mg-protoporphyrin CA IX + phosphate. CC -!- This is the first committed step of chlorophyll biosynthesis and is a CC branchpoint of two major routes in the tetrapyrrole pathway. DR O34845, BCHD_CERS4 ; O50313, BCHD_CHLP8 ; Q93SW0, BCHD_CHLTE ; DR Q9ZGE6, BCHD_HELMO ; P26175, BCHD_RHOCB ; Q9RFD5, BCHH_CERS4 ; DR O50314, BCHH_CHLP8 ; P26162, BCHH_RHOCB ; Q9WXA9, BCHI_ACIRU ; DR O30819, BCHI_CERS4 ; O50312, BCHI_CHLP8 ; Q93SW1, BCHI_CHLTE ; DR P26239, BCHI_RHOCB ; P26174, BCHO_RHOCA ; Q9SJE1, CHLD_ARATH ; DR B8AMB8, CHLD_ORYSI ; Q6ATS0, CHLD_ORYSJ ; O22437, CHLD_PEA ; DR O07345, CHLD_SYNE7 ; P72772, CHLD_SYNY3 ; O24133, CHLD_TOBAC ; DR Q9FNB0, CHLH_ARATH ; B8ANF1, CHLH_ORYSI ; Q10M50, CHLH_ORYSJ ; DR P16127, CHLI1_ARATH; Q5XF33, CHLI2_ARATH; Q44498, CHLI_ANAVA ; DR Q06J65, CHLI_BIGNA ; Q94FT3, CHLI_CHLRE ; P56304, CHLI_CHLVU ; DR Q9TLX7, CHLI_CYACA ; P48101, CHLI_CYAPA ; P31205, CHLI_EUGGR ; DR Q39516, CHLI_GUITH ; Q9MUT3, CHLI_MESVI ; Q1XD93, CHLI_NEOYE ; DR Q9TL08, CHLI_NEPOL ; P58571, CHLI_NOSS1 ; Q32742, CHLI_OLILU ; DR A2XIK9, CHLI_ORYSI ; Q53RM0, CHLI_ORYSJ ; P51394, CHLI_PORPU ; DR P93162, CHLI_SOYBN ; P51634, CHLI_SYNY3 ; O22436, CHLI_TOBAC ; DR P49469, CHLI_TRICV ; //