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FEBS Lett. 1989 Mar 27;246(1-2):185-92.

A developmentally regulated gene product from Dictyostelium discoideum shows high homology to human alpha-L-fucosidase.

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Max-Planck-Institut für Biochemie, Martinsried bei München, FRG.


A cDNA library of poly(A+)-RNA has been prepared from membrane-bound polysomes of Dictyostelium discoideum and screened for clones hybridizing to mRNA species that encode developmentally regulated proteins. The clone investigated in this paper recognizes a 1.8 kb transcript that accumulates strongly between the growth phase and aggregation stage. Stimulation of cells with pulses of cAMP enhances the accumulation. The amino acid sequence derived from a complete cDNA and from a genomic clone displays extensive sequence identity to human liver alpha-L-fucosidase. The D. discoideum DNA sequence encodes a 50.5 kDa polypeptide with a hydrophobic signal peptide at the N-terminus. Antibodies against a synthetic peptide corresponding to amino acids 262-275 of the deduced protein sequence recognize a developmentally regulated 50 kDa protein in D. discoideum that is recovered in the particulate fraction.

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