Truncated and inactivated form of SRK, the female specificity determinant of self-incompatibility when active. Most A.thaliana cultivars contain such an inactive form and thus, are self-fertiles. The protein kinase domain is predicted to be catalytically inactive. Belongs to the protein kinase superfamily. Ser/Thr protein kinase family. Could be the product of a pseudogene. In strain cv. Columbia, a frameshift mutation introduces a premature stop codon leading to a truncated SRK protein. A complete sequence for SRK can be found in strains cv. Pog-0 and cv. Wei-1 (AC P0DH86). Do it yourself - Issue 128 of May 2011