EC |
6.6.1.1 |
Accepted name: |
magnesium chelatase |
Reaction: |
ATP + protoporphyrin IX + Mg2+ + H2O = ADP + phosphate + Mg-protoporphyrin IX + 2 H+ |
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For diagram of heme and chlorophyll biosynthesis, click here |
Other name(s): |
protoporphyrin IX magnesium-chelatase; protoporphyrin IX Mg-chelatase; magnesium-protoporphyrin IX chelatase; magnesium-protoporphyrin chelatase; magnesium-chelatase; Mg-chelatase; Mg-protoporphyrin IX magnesio-lyase |
Systematic name: |
Mg-protoporphyrin IX magnesium-lyase |
Comments: |
This is the first committed step of chlorophyll biosynthesis and is a branchpoint of two major routes in the tetrapyrrole pathway. |
Links to other databases: |
BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 9074-88-8 |
References: |
1. |
Walker, C.J. and Weinstein, J.D. In vitro assay of the chlorophyll biosynthetic enzyme Mg-chelatase: resolution of the activity into soluble and membrane-bound fractions. Proc. Natl. Acad. Sci. USA 88 (1991) 5789–5793. [DOI] [PMID: 11607197] |
2. |
Walker, C.J. and Willows, R.D. Mechanism and regulation of Mg-chelatase. Biochem. J. 327 (1997) 321–333. [PMID: 9359397] |
3. |
Fodje, M.N., Hansson, A., Hansson, M., Olsen, J.G., Gough, S., Willows, R.D. and Al-Karadaghi, S. Interplay between an AAA module and an integrin I domain may regulate the function of magnesium chelatase. J. Mol. Biol. 311 (2001) 111–122. [DOI] [PMID: 11469861] |
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[EC 6.6.1.1 created 2003] |
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