Sequences of S-glycoproteins, products of the Brassica campestris self-incompatibility locus
Abstract
The cruciferous genus Brassica has a self-incompatibility system that is under the sporophytic control of a single locus, S (ref. 1). Although evidence has accumulated that S-locus-specific proteins, termed S-glycoproteins2-4, are strongly associated with the expression of self-incompatibility4-8, their structures and functions are still unknown. This paper reports the sequences of the S-glycoproteins from three homozygotes of Brassica campestris. They show extensive homology. The published DNA sequence data for the S6-glycoprotein of B. oleracea9 can be revised to encode the total sequence of the glycoprotein on the basis of the sequences of S-glycoproteins of B. campestris. These S-glycoproteins have cysteine-rich clusters and 6-7 oligosaccharide chains. There is no homology between the S-glycoproteins of Nicotiana alata10 and those of B. campestris.
- Publication:
-
Nature
- Pub Date:
- March 1987
- DOI:
- 10.1038/326102a0
- Bibcode:
- 1987Natur.326..102T