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Functional and Pathological Roles of AHCY
Pedro Vizán1, Luciano Di Croce1,2,3, Sergi Aranda1
1Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology, Barcelona, Spain.
Frontiers in Cell and Developmental Biology
|April 19, 2021
Summary
Adenosylhomocysteine (AHCY) is a vital enzyme crucial for cellular methylation. Its deficiency causes severe human disorders, highlighting its essential biological role.
Area of Science:
- Biochemistry
- Molecular Biology
- Evolutionary Biology
Background:
- Adenosylhomocysteine (AHCY) is a highly conserved enzyme essential for methyltransferase activity.
- AHCY regulates S-adenosylhomocysteine (SAH) levels, a key inhibitor of methylation.
- Its controlled localization is critical for cellular transmethylation processes.
Purpose of the Study:
- To review the evolutionary, biochemical, and functional aspects of the AHCY protein.
- To discuss recent and controversial findings regarding AHCY's role.
Main Methods:
- Literature review of evolutionary, biochemical, and functional studies on AHCY.
- Analysis of AHCY's role in DNA, RNA, and histone methylation.
- Examination of AHCY deficiency in human genetic disorders.
Main Results:
- AHCY is the sole enzyme in mammals catalyzing SAH breakdown.
- AHCY's recruitment to chromatin correlates with methylation demands.
- AHCY deletion is embryonically lethal, and its deficiency causes human metabolic disorders.
Conclusions:
- AHCY is indispensable for fundamental biological processes, including methylation.
- Understanding AHCY's complex roles is crucial for addressing related human diseases.
- Further research is needed to resolve controversial aspects of AHCY function.
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