Fhj. Schuren et al., THE SC7 SC14 GENE FAMILY OF SCHIZOPHYLLUM-COMMUNE CODES FOR EXTRACELLULAR PROTEINS SPECIFICALLY EXPRESSED DURING FRUIT-BODY FORMATION/, Journal of General Microbiology, 139, 1993, pp. 2083-2090
The Sc7 and Sc14 genes are specifically expressed in the dikaryon of t
he basidiomycete fungus Schizophyllum commune during fruiting. These g
enes are closely linked (within 6 kb) and highly similar in gene struc
ture and nucleotide sequence (70% identical nucleotides in their codin
g regions). The encoded proteins (204 and 214 amino acids, respectivel
y) have 87% similarity in amino acids (56% of the amino acids are iden
tical). They contain putative signal sequences for secretion, are rich
in aromatic amino acids which are generally located at similar positi
ons, and they are generally hydrophilic. Inspection of databanks showe
d similarities with pathogenesis-related proteins (PR1) from plants, t
estis-specific proteins from mammals and venom allergen proteins from
insects. An antibody raised against a Sc7 fusion protein showed the pr
esence of the Sc7 protein in the culture medium and in the fruit bodie
s where it is apparently loosely associated with hyphal walls.