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Related Experiment Videos

Ferrochelatase.

G C Ferreira1

  • 1Department of Biochemistry and Molecular Biology, College of Medicine, University of South Florida, Tampa 33612, USA. gferrreir@com1.med.usf.edu

The International Journal of Biochemistry & Cell Biology
|December 3, 1999
PubMed
Summary
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Ferrochelatase enzyme structure and function were elucidated using recombinant systems. Understanding its mechanism aids in interpreting erythropoietic protoporphyria, a genetic disorder linked to ferrochelatase gene mutations.

Area of Science:

  • Biochemistry
  • Enzymology
  • Structural Biology

Background:

  • Ferrochelatase is the final enzyme in heme biosynthesis, catalyzing iron insertion into protoporphyrin IX.
  • Mutations in the human ferrochelatase gene cause erythropoietic protoporphyria.
  • Advancements in recombinant protein systems enable detailed study of ferrochelatase.

Purpose of the Study:

  • To identify structural elements and elucidate the reaction mechanism of ferrochelatase.
  • To understand the role of key residues and prosthetic groups in ferrochelatase activity.
  • To provide insights into the molecular basis of erythropoietic protoporphyria.

Main Methods:

  • Heterologous overexpression of ferrochelatase.
  • Structural determination of Bacillus subtilis ferrochelatase.

Related Experiment Videos

  • Modeling of the ferrochelatase active site.

    • Main Results:

    • A [2Fe-2S] cluster is identified as a prosthetic group in mammalian ferrochelatase.
    • Conserved histidine and glutamate residues are implicated in metal binding and catalysis, respectively.
    • The three-dimensional structure of Bacillus subtilis ferrochelatase reveals a two-domain structure with the active site in a cleft.

    Conclusions:

    • The structural and mechanistic understanding of ferrochelatase is advanced.
    • Key residues and the [2Fe-2S] cluster are crucial for ferrochelatase function.
    • This knowledge will aid in interpreting mutations causing erythropoietic protoporphyria.