Catalyzes the conversion of oxaloacetate (OAA) to phosphoenolpyruvate (PEP), the rate-limiting step in the metabolic pathway that produces glucose from lactate and other precursors derived from the citric acid cycle. Defects in PCK1 are the cause of cytosolic phosphoenolpyruvate carboxykinase deficiency (C-PEPCKD). A metabolic disorder resulting from impaired gluconeogenesis. It is a rare disease with less than 10 cases reported in the literature. Clinical characteristics include hypotonia, hepatomegaly, failure to thrive, lactic acidosis and hypoglycemia. Autoposy reveals fatty infiltration of both the liver and kidneys. The disorder is transmitted as an autosomal recessive trait. Belongs to the phosphoenolpyruvate carboxykinase [GTP] family. Note: This description may include information from UniProtKB.
Molecular Function: carboxylic acid binding; GDP binding; GTP binding; magnesium ion binding; manganese ion binding; phosphoenolpyruvate carboxykinase (GTP) activity
Biological Process: carbohydrate metabolic process; cellular response to potassium ion starvation; drug metabolic process; gluconeogenesis; glucose homeostasis; glucose metabolic process; glycerol biosynthetic process from pyruvate; internal protein amino acid acetylation; oxaloacetate metabolic process; response to activity; response to insulin stimulus
LTP: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.