The nucleotide (nt) sequence of an Ustilago maydis (Um) gene that comp
lemented a partially osmotic-remedial temperature-sensitive (or-ts) mu
tant defective in apical extension growth has been determined. It cont
ained a continuous open reading frame (OFR) predicted to encode a prot
ein of 853 amino acids (aa). The deduced aa sequence was homologous to
gamma-adaptin, a component of clathrin-coated vesicles derived from t
he Golgi.