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Structure, regulation, and biological functions of TIGAR and its role in diseases
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Journal Article
Structure, regulation, and biological functions of TIGAR and its role in diseases
2021
Overview
TIGAR
(TP53-induced glycolysis and apoptosis regulator) is the downstream target gene of p53, contains a functional sequence similar to 6-phosphofructose kinase/fructose-2, 6-bisphosphatase (PFKFB) bisphosphatase domain. TIGAR is mainly located in the cytoplasm; in response to stress, TIGAR is translocated to nucleus and organelles, including mitochondria and endoplasmic reticulum to regulate cell function. P53 family members (p53, p63, and p73), some transcription factors (SP1 and CREB), and noncoding miRNAs (miR-144, miR-885-5p, and miR-101) regulate the transcription of TIGAR. TIGAR mainly functions as fructose-2,6-bisphosphatase to hydrolyze fructose-1,6-diphosphate and fructose-2,6-diphosphate to inhibit glycolysis. TIGAR in turn facilitates pentose phosphate pathway flux to produce nicotinamide adenine dinucleotide phosphate (NADPH) and ribose, thereby promoting DNA repair, and reducing intracellular reactive oxygen species. TIGAR thus maintains energy metabolism balance, regulates autophagy and stem cell differentiation, and promotes cell survival. Meanwhile, TIGAR also has a nonenzymatic function and can interact with retinoblastoma protein, protein kinase B, nuclear factor-kappa B, hexokinase 2, and ATP5A1 to mediate cell cycle arrest, inflammatory response, and mitochondrial protection. TIGAR might be a potential target for the prevention and treatment of cardiovascular and neurological diseases, as well as cancers.
Publisher
Springer Singapore,Nature Publishing Group
Subject
/ Animals
/ Apoptosis Regulatory Proteins - chemistry
/ Apoptosis Regulatory Proteins - genetics
/ Apoptosis Regulatory Proteins - metabolism
/ Apoptosis Regulatory Proteins - physiology
/ Biomedical and Life Sciences
/ Cancer
/ Cardiovascular Diseases - physiopathology
/ Cyclic AMP response element-binding protein
/ Fructose
/ Humans
/ Kinases
/ Nervous System Diseases - physiopathology
/ Phosphoric Monoester Hydrolases - chemistry
/ Phosphoric Monoester Hydrolases - genetics
/ Phosphoric Monoester Hydrolases - metabolism
/ Phosphoric Monoester Hydrolases - physiology
/ Retina
/ Review
/ Tumor Suppressor Protein p53 - metabolism
/ Vaccine
