Overexpression of Sas-4 by approximately fivefold in wild-type wing disc cells (through expression of Sas-4Ubi.P.T:Avic\GFP) does not increase centriole length nor detectable centriole microtubule protrusions.
The overexpression of Sas-4Ubi.P.T:Avic\GFP does not cause centriole overduplication in spermatocytes or syncytial embryos.
Centrioles replicate normally in syncytial embryos expressing Sas-4Ubi.P.T:Avic\GFP. No extra centrioles are detected in the female germline, male germline or mitotic third larval instar brain cells in animals expressing Sas-4Ubi.P.T:Avic\GFP.
Expression of Sas-4Ubi.P.T:Avic\GFP does not result in de novo formation of centriole-like structures in unfertilised eggs (which do not normally contain centrioles).
Sas-4Ubi.P.GFP is an enhancer of centriole phenotype of Cp110Δ
Sas-4Ubi.P.GFP is a non-enhancer of centriole phenotype of ana2Ubi.C.GFP
Sas-4Ubi.P.GFP is a non-enhancer of centriole phenotype of Sas-6Ubi.P.GFP
In a Cp110Δ background, Sas-4Ubi.P.T:Avic\GFP expression leads to an increase in centriole length by approximately 30%.
The overexpression of Sas-4Ubi.P.T:Avic\GFP in Cp110Δ mutant syncytial embryos does not cause centriole overduplication.