Nucleic Acids Research, 1986, Vol. 14, No. 11 4625-4638
© 1986
Articles |
The structure and transcription start site of major potato tuber protine gene
Molecular Genetics Department, Plant Breeding Institute Marts Lane, Trumpington, Cambridge, UK
*To whom correspondence should be addressed
Received March 26, 1986. Revised May 6, 1986. Accepted May 6, 1986.
We have isolated recombinant lambda clones containing intact major tuber protein (patatin) genes and flanking sequences from the commercial tetraploid variety Marls Piper. The gene is composed of seven exons and six introns, spread over 4 kb of DNA. Nuclease mapping defined the 5' end of the mRNA approximately 45 bp upstream of the initiation codon. The 5' end of the gene is preceeded by a canonical TATA box sequence. The three known patatin genes encode proteins of nearly identical Mr but very different isoelectric points. The sequence of the gene does not indicate a role for patatin as one of the globulin class of plant storage proteins.
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