Transcriptional adaptor ADA3 of Drosophila melanogaster is required for histone modification, position effect variegation, and transcription.

ABSTRACT: The Drosophila melanogaster gene diskette (also known as dik or dAda3) encodes a protein 29% identical to human ADA3, a subunit of GCN5-containing histone acetyltransferase (HAT) complexes. The fly dADA3 is a major contributor to oogenesis, and it is also required for somatic cell viability. dADA3 localizes to chromosomes, and it is significantly reduced in dGcn5 and dAda2a, but not in dAda2b, mutant backgrounds. In dAda3 mutants, acetylation at histone H3 K9 and K14, but not K18, and at histone H4 K12, but not K5, K8, and K16, is significantly reduced. Also, phosphorylation at H3 S10 is reduced in dAda3 and dGcn5 mutants. Variegation for white (w(m4)) and scute (Hw(v)) genes, caused by rearrangements of X chromosome heterochromatin, is modified in a dAda3(+) gene-dosage-dependent manner.

SUBMITTER: Grau B 

PROVIDER: S-EPMC2223303 | biostudies-literature | 2008 Jan

REPOSITORIES: biostudies-literature