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2018 ; 19
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Functional Regulation of PPARs through Post-Translational Modifications
#MMPMID29895749
Brunmeir R
; Xu F
Int J Mol Sci
2018[Jun]; 19
(6
): ä PMID29895749
show ga
Peroxisome proliferator-activated receptors (PPARs) belong to the nuclear
receptor superfamily and they are essential regulators of cell differentiation,
tissue development, and energy metabolism. Given their central roles in sensing
the cellular metabolic state and controlling metabolic homeostasis, PPARs became
important targets of drug development for the management of metabolic disorders.
The function of PPARs is mainly regulated through ligand binding, which induces
structural changes, further affecting the interactions with co-activators or
co-repressors to stimulate or inhibit their functions. In addition, PPAR
functions are also regulated by various Post-translational modifications (PTMs).
These PTMs include phosphorylation, SUMOylation, ubiquitination, acetylation, and
O-GlcNAcylation, which are found at numerous modification sites. The addition of
these PTMs has a wide spectrum of consequences on protein stability,
transactivation function, and co-factor interaction. Moreover, certain PTMs in
PPAR proteins have been associated with the status of metabolic diseases. In this
review, we summarize the PTMs found on the three PPAR isoforms PPAR?, PPAR?/?,
and PPAR?, and their corresponding modifying enzymes. We also discuss the
functional roles of these PTMs in regulating metabolic homeostasis and provide a
perspective for future research in this intriguing field.