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Primary structure and activity of mouse methylmalonyl-CoA mutase
M F Wilkemeyer1, A M Crane, F D Ledley
1Howard Hughes Medical Institute, Department of Cell Biology, Baylor College of Medicine, Houston, TX 77030.
The Biochemical Journal
|October 15, 1990
Summary
Researchers cloned mouse methylmalonyl-CoA mutase (MCM) cDNA, confirming its structural and functional similarity to human MCM. This mouse model aids in studying MCM deficiency disorders like methylmalonic acidemia.
Area of Science:
- Biochemistry
- Enzymology
- Molecular Biology
Background:
- Methylmalonyl-CoA mutase (MCM) is crucial for organic acid metabolism.
- Deficiency in MCM leads to methylmalonic acidemia, a severe metabolic disorder.
- Understanding MCM's structure and function is vital for therapeutic development.
Purpose of the Study:
- To clone and characterize mouse MCM cDNA.
- To investigate the functional and structural homology between mouse and human MCM.
- To establish a mouse model for studying methylmalonic acidemia.
Main Methods:
- Cloning of mouse MCM cDNA.
- Expression and activity assays in cell cultures and liver extracts.
- Amino acid sequence analysis and comparison.
- Complementation of genetic deficiency in cultured cells.
Main Results:
- Mouse MCM cDNA was cloned and characterized.
- Mouse MCM demonstrated activity and kinetics similar to human MCM.
- High sequence identity (94%) was observed between mouse and human MCM.
- Transfected mouse MCM complemented MCM deficiency in patient-derived cells.
Conclusions:
- Mouse MCM is structurally and functionally homologous to human MCM.
- The mouse is a suitable model for studying MCM and methylmalonic acidemia.
- This research provides a foundation for further investigation into MCM-related disorders.