We have previously shown that three Petunia inflata S-proteins, products of the multiallelic S-gene of the self-incompatibility system, are ribonucleases. Here we report the expression of cDNAs for two of these S-proteins using the baculovirus expression system. S2- and S3-proteins were found in both supernatants and lysates of Spodoptera frugiperda cells infected with recombinant baculoviruses. Both recombinant S-proteins contained glycosylated (25 kD) and nonglycosylated (23 kD) forms. Recombinant S2- and S3-proteins were purified from insect cell cultures, and the amino-terminal sequences determined from glycosylated S2- and S3-proteins indicated that the leader peptide encoded by each cDNA was correctly removed. Both glycosylated and nonglycosylated forms of S2- and S3-proteins exhibited ribonuclease activity.
|Original language||English (US)|
|Number of pages||6|
|Journal||Biochemical and Biophysical Research Communications|
|Publication status||Published - Aug 31 1992|
All Science Journal Classification (ASJC) codes
- Molecular Biology
- Cell Biology