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Glucose 6-phosphatase-β is a ubiquitously expressed, 346-amino acid membrane protein that shares 36% sequence identity with glucose 6-phosphatase-α. Within the glucose 6-phosphatase-β enzyme, sequence alignments predict that its active site contains His167, His114, and Arg79.
Glucose-6-phosphatase, catalytic subunit (glucose 6-phosphatase alpha) is an enzyme that in humans is encoded by the G6PC gene. [ 5 ] [ 6 ] Glucose-6-phosphatase is an integral membrane protein of the endoplasmic reticulum that catalyzes the hydrolysis of D-glucose 6-phosphate to D-glucose and orthophosphate.
This gene encodes the catalytic subunit of glucose 6-phosphatase (G6Pase). G6Pase is located in the endoplasmic reticulum (ER) and catalyzes the hydrolysis of glucose 6-phosphate to glucose and phosphate in the last step of the gluconeogenic and glycogenolytic pathways. [5]
[5] [6] [7] It consists of three subunits, each of which are vital components of the multi-enzyme Glucose-6-Phosphatase Complex (G6Pase). This important enzyme complex is located within the membrane of the endoplasmic reticulum, and catalyzes the terminal reactions in both glycogenolysis and gluconeogenesis. [8]
14378 Ensembl ENSG00000278373 ENSG00000152254 ENSMUSG00000005232 UniProt Q9NQR9 Q9Z186 RefSeq (mRNA) NM_001081686 NM_021176 NM_001289856 NM_001289857 NM_021331 RefSeq (protein) NP_001075155 NP_066999 NP_001276785 NP_001276786 NP_067306 Location (UCSC) Chr 2: 168.9 – 168.91 Mb Chr 2: 69.04 – 69.06 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Glucose-6-phosphatase 2 is an enzyme ...
The G6P remains within the liver cell unless the phosphate is cleaved by glucose-6-phosphatase. This dephosphorylation reaction produces free glucose and free PO 4 anions. The free glucose molecules can be transported out of the liver cells into the blood to maintain an adequate supply of glucose to the brain and other organs. Glycogenolysis ...
Glucose-6-phosphate isomerase (GPI), alternatively known as phosphoglucose isomerase/phosphoglucoisomerase (PGI) or phosphohexose isomerase (PHI), is an enzyme ( EC 5.3.1.9) that in humans is encoded by the GPI gene on chromosome 19. [4] This gene encodes a member of the glucose phosphate isomerase protein family.
This reaction converts glucose 6-phosphate to fructose 6-phosphate in preparation for phosphorylation to fructose 1,6-bisphosphate. [2] The addition of the second phosphoryl group to produce fructose 1,6-bisphosphate is an irreversible step, and so is used to irreversibly target the glucose 6-phosphate breakdown to provide energy for ATP ...