Cloning and sequencing of cDNAs encoding two SSS |
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Authors: | Yunjun Ai De-Sheng Tsai Teh-hui Kao |
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Institution: | (1) Department of Molecular and Cell Biology, The Pennsylvania State University, 16802 University Park, PA, USA |
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Abstract: | A defective S-allele, S
0, and a functional S-allele, S
x, have previously been found to be retained in an F1 hybrid of a self-compatible commercial cultivar of Petunia hybrida. Pistil proteins associated with these two alleles have also been identified. Their amino-terminal sequences have been found to share a high degree of similarity with those of S-proteins characterized from self-incompatible solanaceous species. Here we report the isolation and sequencing of cDNAs encoding S
0- and S
x-proteins. Their deduced amino acid sequences contain all the consensus primary structural features of S-proteins from self-incompatible solanaceous species. Both proteins also have ribonuclease activity. The implications of these findings are discussed in relation to the presumed function of the S-protein in the self-incompatibility interaction. |
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Keywords: | cDNA and amino acid sequences S-allele-associated proteins self-compatible cultivar of Petunia hybrida |
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