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New insights into the structure and function of CNNM proteins
1Department of Biochemistry & Molecular Biology, Life Sciences Institute, The University of British Columbia, Vancouver, BC, Canada.
The FEBS Journal
|May 24, 2023
Summary
CNNMs are vital magnesium transporters found across biology. Recent studies reveal their transmembrane domain transports ions, while the CBS-pair domain regulates this process, advancing our understanding of these crucial proteins.
Area of Science:
- Biochemistry
- Molecular Biology
- Structural Biology
Background:
- Magnesium (Mg2+) is essential for cellular functions, and its transport is critical.
- CNNMs (CBS-pair domain divalent metal cation transport mediators) are a newly identified family of Mg2+ transporters.
- Four human CNNM proteins are implicated in divalent cation transport, genetic disorders, and cancer.
Purpose of the Study:
- To review structural and functional studies of CNNMs.
- To elucidate the regulatory mechanisms and ion transport functions of CNNMs.
- To highlight recent advances in understanding CNNM proteins.
Main Methods:
- Review of existing structural and functional studies on eukaryotic and prokaryotic CNNMs.
- Analysis of recent structural data for prokaryotic CNNMs.
- Summary of studies identifying mammalian CNNM binding partners.
Main Results:
- Prokaryotic CNNM structures confirm the transmembrane domain's role in ion transport.
- The CBS-pair domain likely regulates ion transport through divalent cation binding.
- New binding partners for mammalian CNNMs have been identified.
Conclusions:
- CNNMs are deeply conserved and widespread ion transporters.
- Understanding CNNM structure and function is advancing rapidly.
- These transporters play significant roles in cellular magnesium homeostasis and disease.
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