TIGAR Fructose-bisphosphatase hydrolyzing fructose-2,6-bisphosphate as well as fructose-1,6-bisphosphate. Acts as a negative regulator of glycolysis by lowering intracellular levels of fructose-2,6-bisphosphate in a p53/TP53-dependent manner, resulting in the pentose phosphate pathway (PPP) activation and NADPH production. Contributes to the generation of reduced glutathione to cause a decrease in intracellular reactive oxygen species (ROS) content, correlating with its ability to protect cells from oxidative or metabolic stress-induced cell death. Plays a role in promoting protection against cell death during hypoxia by decreasing mitochondria ROS levels in a HK2-dependent manner through a mechanism that is independent of its fructose-bisphosphatase activity. In response to cardiac damage stress, mediates p53-induced inhibition of myocyte mitophagy through ROS levels reduction and the subsequent inactivation of BNIP3. Reduced mitophagy results in an enhanced apoptotic myocyte cell death, and exacerbates cardiac damage. Plays a role in adult intestinal regeneration; contributes to the growth, proliferation and survival of intestinal crypts following tissue ablation. Plays a neuroprotective role against ischemic brain damage by enhancing PPP flux and preserving mitochondria functions. Protects glioma cells from hypoxia- and ROS-induced cell death by inhibiting glycolysis and activating mitochondrial energy metabolism and oxygen consumption in a TKTL1-dependent and p53/TP53-independent manner. Plays a role in cancer cell survival by promoting DNA repair through activating PPP flux in a CDK5-ATM-dependent signaling pathway during hypoxia and/or genome stress-induced DNA damage responses. Involved in intestinal tumor progression. Belongs to the phosphoglycerate mutase family. Expressed in the brain (PubMed:22887998). Expressed in breast tumors (PubMed:21820150). Expressed in glioblastomas (PubMed:22887998). Note: This description may include information from UniProtKB.
Protein type: EC; Phosphatase (non-protein)
Chromosomal Location of Human Ortholog: 12p13.32
Cellular Component:  cytoplasm; cytosol; mitochondrial outer membrane; nucleus
Molecular Function:  bisphosphoglycerate 2-phosphatase activity; fructose-2,6-bisphosphate 2-phosphatase activity; protein binding
Biological Process:  apoptotic process; autophagy; cellular response to cobalt ion; cellular response to DNA damage stimulus; cellular response to hypoxia; dephosphorylation; fructose 1,6-bisphosphate metabolic process; fructose 2,6-bisphosphate metabolic process; intestinal epithelial cell development; negative regulation of glucose catabolic process to lactate via pyruvate; negative regulation of glycolytic process; negative regulation of mitophagy; negative regulation of neuron death; negative regulation of programmed cell death; negative regulation of reactive oxygen species metabolic process; positive regulation of cardiac muscle cell apoptotic process; positive regulation of DNA repair; positive regulation of hexokinase activity; regulation of pentose-phosphate shunt; regulation of response to DNA damage checkpoint signaling; response to gamma radiation; response to ischemia; response to xenobiotic stimulus
Reference #:  Q9NQ88 (UniProtKB)
Alt. Names/Synonyms: C12orf5; chromosome 12 open reading frame 5; Fructose-2,6-bisphosphatase TIGAR; Probable fructose-2,6-bisphosphatase TIGAR; TIGAR; TP53-induced glycolysis and apoptosis regulator; transactivated by NS3TP2 protein
Gene Symbols: TIGAR
Molecular weight: 30,063 Da
Basal Isoelectric point: 7.6  Predict pI for various phosphorylation states
CST Pathways:  Warburg Effect
Protein-Specific Antibodies or siRNAs from Cell Signaling Technology® Total Proteins
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Protein Structure Not Found.

Cross-references to other databases:  STRING  |  cBioPortal  |  Wikipedia  |  neXtProt  |  Protein Atlas  |  BioGPS  |  Pfam  |  RCSB PDB  |  ENZYME  |  Phospho3D  |  Phospho.ELM  |  NetworKIN  |  UniProtKB  |  Entrez-Gene  |  GenPept  |  Ensembl Gene  |  InnateDB