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Garber, Manuel
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overview
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Narrative
Manuel Garber received his Ph.D. in Mathematics at Brandeis University in 1999. From 1999 to 2004 Dr. Garber worked on applications of incipient web technologies to telecommunications, financial services and distribution channels. In 2004 Dr. Garber joined the Broad Institute as a computational biologist. At the Broad Institute, he focused on analyzing the human genome sequence and led studies of the evolution of segmental duplications. He developed comparative sequence analysis methods to detect regions undergoing natural selection using the growing number of sequenced genomes of related mammalian species. Dr. Garber’s focus shifted to functional characterization of genomic elements using genome-wide functional assays such as RNA-Seq and ChIP-Seq. Dr. Garber’s methods have been critical to the discovery and characterization of a novel set of large intergenic non-coding RNAs (lincRNAs) and to our understanding of the immune transcriptional response to pathogens. In September 2012, Dr. Garber moved to the University of Massachusetts Medical School to establish his laboratory and direct the Bioinformatics core. He is an associated professor in the Program in Bioinformatics and Integrative Biology. Dr. Garber continues to study lincRNAs and in particular their evolutionary history, as well as the systematic dissection of the transcriptional regulation of the immune response. - The Functional Genome
Of the 3 billion bases of the human genome, only ~1.2% encodes genes that are translated into proteins. Yet, a much larger percentage encodes functional genetic elements. Many of these functional elements control how genes are regulated to produce specific patterns of expression in different tissues and cell types. Precisely how these elements work remains an open question in biology.We collaborate closely with experimental labs to develop algorithms and design experiments for analyzing and integrating genome-wide experiments with the goal of mapping and characterizing the functional genome and how it orchestrates gene expression across development and in response to environmental stimulus. Current advances in sequencing technologies have enabled systematic, genome-wide readouts of cell function. Bioinformatics approaches are critical to fully take advantage of these new approaches. Dr Garber’s group strives to develop the tools to analyze, integrate and fully leverage the advancements in genome wide experimental technologies. We have developed and continue to enhance the Scripture toolkit for short read analysis (ChIP-Seq and RNA-Seq) and the SiPhy suite for comparative sequence analysis. Both tools have been critical in our exploration of the functional landscape of the human genome.- Evolution of non-coding genes
Large intergenic non-coding RNAs are spliced, polyadenylated and capped transcripts that do not overlap annotated protein coding genes and have little to no protein coding potential. We recently identified about 1500 lincRNAs using both epigenetic signatures of expression and transcriptional profiling by RNA-Seq. LincRNAs are an integral part of the cell’s transcriptional network. Interestingly, while lincRNAs display clear signatures of selection, their conservation profiles are markedly different from those of protein coding genes. Our lab aims to integrate functional data such us protein-RNA, RNA-DNA and RNA-RNA interactions with comparative analysis to understand the evolution of these interactions and how they have changed the molecular circuitry of the cell.- Gene regulation
It is now clear that most phenotypic changes observed across vertebrates are not due to changes in protein coding genes, but are due to changes in gene regulation. However, how gene regulation is encoded in the genome is only now beginning to be understood. How the binding of a transcription factor to a promoter or enhancer affects target gene expression is still unclear. Only by studying the interplay between regulatory elements and their targets can we evaluate the functional role of cis-regulatory elements. Sequencing assays now allow us to monitor transcription factor binding (ChIP-Seq) and cellular output (RNA-Seq) at an unprecedented scale. We are currently studying this interplay by using the response of bone marrow derived dendritic cells (BMDCs) to pathogen stimuli as our biological system. Up to this point, our integrated analysis of temporal datasets of transcription binding and gene expression showed that binding of different factors is responsible for subtle expression patterns that control specific pathways. These pathways have very distinct forms of regulation: a minority of pathways are regulated by few transcription factors (e.g. Stat1 and Stat2) whose targets are very responsive to knock down of these factors and have very conserved binding sites. In contrast, most pathways are controlled by a larger set of redundant transcription factors, whose binding has an additive effect and expression where the number rather than the type of factors bound gives rise to different expression levels. Our group continues to work closely with experimental groups to further enhance and characterize these datasets in order to crack the regulatory code of mammalian immune cells.
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Rotation Projects
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If you are interesting in applying computational methods to biological problems please contact me. Potential projects in my lab are - Modeling of transcription factor gene expression control in innate immune cells
- Evolutionary analysis of gene transcription factor networks in mammals
- Epigenetics inheritance in mice: From male sperm to phenotypic effect in grandchildren
- Application of genome and exome sequencing to newborn screening
- Development of computational methods for analysis of RNA-protein interactions
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Garber, Manuel