Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Chromosomal clustering of genes in absent, small, or homeotic discs 2 (ash2) mutant larvae


ABSTRACT: We have performed a systematic examination of genome-wide expression profiles using microarrays to reconstruct a global picture of the trx regulatory gene network in D. melanogaster. Using computational analysis of the microarray data, we have identified 25 clusters of genes potentially regulated by trx, most of them being located in the arm L of chromosome 3. Functional analysis revealed that most clusters are enriched in structural proteins involved in cuticle formation, which are preferently expressed in salivary glands. The same organization in clusters was observed in the transcriptomes of four independent experiments, being a distinctive feature of the regulatory networks of trx and other chromatin regulators (ASH2, NURF, Pc, ASH1). We have also identified many of these clusters in D. simulans, D. yakuba, D. pseudoobscura and partially in A. gambiae. Keywords: loss of function analysis Total RNA from w1118;+;+ larvae was pooled and used as a common reference in four microarrays against w1118;+;ash2I1 total RNA coming from two different extractions to take biological differences into account. Amplified RNA (aRNA) was obtained with the Amino-Allyl Messageamp II aRNA Amplification Kit (Ambion, Inc) from w1118;+;+ and w1118;+;ash2I1 prior to hybridization.

ORGANISM(S): Drosophila melanogaster

SUBMITTER: Adrià Punset 

PROVIDER: E-GEOD-8750 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Conserved chromosomal clustering of genes governed by chromatin regulators in Drosophila.

Blanco Enrique E   Pignatelli Miguel M   Beltran Sergi S   Punset Adrià A   Pérez-Lluch Silvia S   Serras Florenci F   Guigó Roderic R   Corominas Montserrat M  

Genome biology 20080910 9


<h4>Background</h4>The trithorax group (trxG) and Polycomb group (PcG) proteins are responsible for the maintenance of stable transcriptional patterns of many developmental regulators. They bind to specific regions of DNA and direct the post-translational modifications of histones, playing a role in the dynamics of chromatin structure.<h4>Results</h4>We have performed genome-wide expression studies of trx and ash2 mutants in Drosophila melanogaster. Using computational analysis of our microarray  ...[more]

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