GOLGB1 (golgin B1) encodes a large coiled-coil protein called giantin that localizes to the Golgi membrane and plays crucial roles in Golgi organization and protein glycosylation 1. The protein functions in forming intercisternal cross-bridges of the Golgi complex and is essential for proper protein glycosylation processes 1. Mechanistically, GOLGB1 regulates hyaluronan accumulation and protein glycosylation in tissue development, particularly during palatal shelf elevation 1. Disease relevance of GOLGB1 is significant, as loss-of-function mutations cause cleft palate in mice through impaired protein glycosylation and reduced hyaluronan accumulation in palatal mesenchyme 1. The gene has been associated with multiple human conditions including bipolar disorder, where deficiency results in altered locomotor activity and mood-related behaviors through effects on PSD93 and PI3K/Akt signaling 2. Additionally, GOLGB1 variants are associated with dilated cardiomyopathy risk 3, hemorrhagic stroke susceptibility 4, and pulmonary arterial hypertension 5. Clinical significance extends to potential therapeutic applications, as GOLGB1 represents a candidate drug target for dilated cardiomyopathy treatment 3 and serves as a molecular marker in agricultural breeding programs 6.