Glucokinase regulatory protein

UniProtKB accession:  Q07071

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UniProtKB description:  Regulates glucokinase (GCK) by forming an inactive complex with this enzyme (PubMed:23957911). Acts by promoting GCK recruitment to the nucleus, possibly to provide a reserve of GCK that can be quickly released in the cytoplasm after a meal (PubMed:10456334). The affinity of GCKR for GCK is modulated by fructose metabolites: GCKR with bound fructose 6-phosphate has increased affinity for GCK, while GCKR with bound fructose 1-phosphate has strongly decreased affinity for GCK and does not inhibit GCK activity (PubMed:23957911).