An approximately 3kb genomic fragment in which Smn is expressed under the control of its own promoter and flanking sequences. Two mutations have been introduced into the coding region: S201A (in the putative degron) and G206S (a mutation that is associated with spinal muscular atrophy when present in the orthologous human gene).
SmnS201A.G206S.Tag:FLAG partially rescues SmnX7
SmnS201A.G206S.T:Zzzz\FLAG rescues both the larval lethality and the larval locomotor defects of SmnX7 homozygotes, although individuals still show semi-lethality as compared to controls.