Glutamine synthetase/GLUL Protein, Human (His)

Glutamine synthetase/GLUL Protein serves as a crucial enzyme catalyzing the ATP-dependent conversion of glutamate and ammonia to glutamine. Its functional significance varies with tissue localization; in the brain, it plays a pivotal role in regulating levels of toxic ammonia and converting neurotoxic glutamate to harmless glutamine. Conversely, in the liver, GLUL is integral to the enzymatic machinery responsible for ammonia removal. Beyond its classical role in glutamine synthesis, GLUL exhibits diverse functions. It is essential for the proliferation of fetal skin fibroblasts and independently contributes to endothelial cell migration during vascular development by regulating membrane localization and activation of the GTPase RHOJ, potentially through promoting RHOJ palmitoylation. Furthermore, GLUL may act as a palmitoyltransferase for RHOJ, demonstrating autopalmitoylation capability and subsequent transfer of the palmitoyl group to RHOJ. Additionally, GLUL plays a role in ribosomal 40S subunit biogenesis. The multifaceted activities of GLUL underscore its importance in various cellular processes, highlighting its versatility in both metabolic and regulatory contexts.