Nucleic Acids Research, 1984, Vol. 12, No. 21 7987-8000
© 1984
MOLECULAR BIOLOGY |
Isolation and sequence analysis of cDNAs for the major potato tuber protein, patatin
Texas A&M University, Biochemistry and Biophysics Department College Station, TX 77843-2128, USA
Received August 23, 1984. Revised October 15, 1984. Accepted October 15, 1984.
A cDNA library from membrane-bound poly(A)+ mRNA of developing potato tubers was constructed and two classes of essentially full-length cDNA clones for a precursor to the major tuber glycoprotein, patatin were isolated. Sequence analysis shows that the two classes are approximately 98% homologous and correspond to the two major species of patatin identified previously by NH2-terminal amino acid sequence analysis. Sequence analysis also predicts that patatin 1s synthesized with a 23 amino acid signal sequence. Northern blot analysis shows that patatin mRNAs are 155O±5O nucleotides 1n length and are normally not present in polyribosomal or total RNA from stems or leaves.
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