description
GDP-mannose is the mannose donor for the first 5 mannose addition reactions in the N-glycan precursor synthesis, and also for the synthesis of Dolichyl-phosphate-mannose involved in other mannose transfer reactions. It is synthesized from fructose 6-phosphate and GTP in three steps

external resources
NCBI:1268719
REACTOME:R-HSA-446205

genes
MPI , PMM1 , PMM2 , GMPPB , GMPPA ,