The Role of Dimerization in Human Peptidylarginine Deiminase 4 Activity
Author Information
Author(s): Liu Yi-Liang, Chiang Yu-Hsiu, Liu Guang-Yaw, Hung Hui-Chih
Primary Institution: National Chung-Hsing University, Taichung, Taiwan
Hypothesis
Dimerization is essential for the full enzymatic activity of PAD4.
Conclusion
Dimerization of PAD4 is crucial for its enzymatic activity and calcium-binding cooperativity.
Supporting Evidence
- Disrupting the dimer interface of PAD4 decreases its enzymatic activity.
- Monomeric PAD4 retains some activity but lacks cooperative calcium binding.
- The study identified key residues involved in dimer formation.
- PAD4's dimeric form is essential for its full enzymatic function.
Takeaway
This study shows that when the PAD4 enzyme splits into single pieces, it doesn't work as well, but it can still do some of its job.
Methodology
The study involved creating dimer interface mutants of PAD4 and analyzing their quaternary structures and enzymatic activities through sedimentation velocity experiments.
Limitations
The study does not explore the physiological roles of PAD4 in vivo or the effects of other PAD isoforms.
Digital Object Identifier (DOI)
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