Mannose-1-phosphate guanylyltransferase, C-terminal Left-handed parallel beta helix (LbH) domain: Mannose-1-phosphate guanylyltransferase is also known as GDP-mannose pyrophosphorylase. It catalyzes the synthesis of GDP-mannose from GTP and mannose-1-phosphate, and is involved in the maintenance of cell wall integrity and glycosylation. Similar to ADP-glucose pyrophosphorylase, it contains an N-terminal catalytic domain that resembles a dinucleotide-binding Rossmann fold and a C-terminal LbH fold domain, presumably with 4 turns, each containing three imperfect tandem repeats of a hexapeptide repeat motif (X-[STAV]-X-[LIV]-[GAED]-X). Proteins containing hexapeptide repeats are often enzymes showing acyltransferase activity.
Jiyao W et al.(2023). "The conserved domain database in 2023.",