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. 1982 Dec 20;10(24):8225–8244. doi: 10.1093/nar/10.24.8225

Closely related families of genes code for the alpha and alpha' subunits of the soybean 7S storage protein complex.

M A Schuler, E S Schmitt, R N Beachy
PMCID: PMC327081  PMID: 6298713

Abstract

Nineteen cloned cDNAs encoding the alpha and alpha'-subunits of the 7S seed storage protein in the soybean, Glycine max, have been isolated from a recombinant cDNA library constructed with mRNA from maturing seeds. In addition, a gene encoding an alpha'-subunit has been isolated from a recombinant Charon 4A phage library containing genomic Glycine max DNA. The cloned DNAs have been divided, on the basis of their endonuclease sites, into two main classes of sequences which differ in approximately 6% of their nucleotides. Whereas the proteins encoded within each DNA class are nearly identical, the proteins encoded by the two different classes of soybean DNAs are distinct and correspond to alpha and alpha'-subunits. Thus, the alpha and alpha'-subunits are coded for by two closely related multigene families. The amino acid differences in the portions of the alpha and alpha'-subunits presented in this paper occur primarily near the carboxyl-terminus. The 3' noncoding nucleotides of the cloned alpha and alpha'-subunit DNAs are more highly conserved than are the coding nucleotides. This conservation suggests that the 3' untranslated sequences of the alpha and alpha'-subunit mRNAs are functional in the expression of the alpha and alpha'-subunit proteins or in the stabilization of the 7S subunit mRNAs.

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Selected References

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