The Hox genes encode a conserved family of homeodomain-containing transcriptional regulators that are critical for many aspects of animal development, in all metazoans. The long-term goal of this project is to understand how these proteins function as transcriptional regulators at a mechanistic level. Three approaches will be used: 1) a structure-function analysis of three Hox proteins, using an in vivo, rescue-based strategy, focusing especially on Hox protein motifs that interact with Hox cofactors in a context-dependent manner, 2) the high-resolution characterization of individual Hox- targeted regulatory elements, and 3) an analysis of the Hox-dependent chromatin architectures in the imaginal discs, the precursors of the adult fly. Together, these studies will provide important insights int how these and other transcriptional regulators carry out their specific functions during animal development.

Public Health Relevance

This project will investigate the mechanism by which the Hox family of transcriptional regulators controls their downstream target genes in Drosophila. Emphasis is placed on using rescuing transgenes to carry out a structure-function analysis of conserved protein motifs as well as on mechanistic studies of individual, Hox-regulated elements. An analysis of Hox-dependent tissue-specific chromatin structures will also be executed.

National Institute of Health (NIH)
National Institute of General Medical Sciences (NIGMS)
Research Project (R01)
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Development - 2 Study Section (DEV2)
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Hoodbhoy, Tanya
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Columbia University
Schools of Medicine
New York
United States
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Merabet, Samir; Mann, Richard S (2016) To Be Specific or Not: The Critical Relationship Between Hox And TALE Proteins. Trends Genet 32:334-47
O'Connell, Nichole E; Lelli, Katherine; Mann, Richard S et al. (2015) Asparagine deamidation reduces DNA-binding affinity of the Drosophila melanogaster Scr homeodomain. FEBS Lett 589:3237-41
Crocker, Justin; Abe, Namiko; Rinaldi, Lucrezia et al. (2015) Low affinity binding site clusters confer hox specificity and regulatory robustness. Cell 160:191-203
Oh, Hyangyee; Slattery, Matthew; Ma, Lijia et al. (2014) Yorkie promotes transcription by recruiting a histone methyltransferase complex. Cell Rep 8:449-59
Riley, Todd R; Slattery, Matthew; Abe, Namiko et al. (2014) SELEX-seq: a method for characterizing the complete repertoire of binding site preferences for transcription factor complexes. Methods Mol Biol 1196:255-78
Shazman, Shula; Lee, Hunjoong; Socol, Yakov et al. (2014) OnTheFly: a database of Drosophila melanogaster transcription factors and their binding sites. Nucleic Acids Res 42:D167-71
Agelopoulos, Marios; McKay, Daniel J; Mann, Richard S (2014) cgChIP: a cell type- and gene-specific method for chromatin analysis. Methods Mol Biol 1196:291-306
Oh, Hyangyee; Slattery, Matthew; Ma, Lijia et al. (2013) Genome-wide association of Yorkie with chromatin and chromatin-remodeling complexes. Cell Rep 3:309-18
Doitsidou, Maria; Flames, Nuria; Topalidou, Irini et al. (2013) A combinatorial regulatory signature controls terminal differentiation of the dopaminergic nervous system in C. elegans. Genes Dev 27:1391-405
Agelopoulos, Marios; McKay, Daniel J; Mann, Richard S (2012) Developmental regulation of chromatin conformation by Hox proteins in Drosophila. Cell Rep 1:350-9

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