Sandhya Xirasagar

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CEBS (Chemical Effects in Biological Systems) is an integrated public repository for toxicogenomics data, including the study design and timeline, clinical chemistry and histopathology findings and microarray and proteomics data. CEBS contains data derived from studies of chemicals and of genetic alterations, and is compatible with clinical and(More)
The hematopoietic cell-specific protein Vav1 is a substrate of tyrosine kinases activated following engagement of many receptors, including FcepsilonRI. Vav1-deficient mice contain normal numbers of mast cells but respond more weakly than their normal counterparts to a passive systemic anaphylaxis challenge. Vav1-deficient bone marrow-derived mast cells(More)
MOTIVATION To promote a systems biology approach to understanding the biological effects of environmental stressors, the Chemical Effects in Biological Systems (CEBS) knowledge base is being developed to house data from multiple complex data streams in a systems friendly manner that will accommodate extensive querying from users. Unified data representation(More)
The goal of the Papillomavirus Episteme (PaVE) is to provide an integrated resource for the analysis of papillomavirus (PV) genome sequences and related information. The PaVE is a freely accessible, web-based tool ( created around a relational database, which enables storage, analysis and exchange of sequence information. From a(More)
BACKGROUND To understand how the high-affinity IgE receptor (FcepsilonRI) communicates with downstream effectors, we focused on exploring the functional importance of the FcepsilonRI-mediated formation and localization of a signaling complex that contains the hematopoietic cell-specific scaffolding protein linker for activation of T cells (LAT) and the(More)
TRAP (trp RNA-binding attenuation protein) is a tryptophan-activated RNA-binding protein that regulates expression of the trp biosynthetic genes by binding to a series of GAG and UAG trinucleotide repeats generally separated by two or three spacer nucleotides. Previously, we showed that TRAP contains 11 identical subunits arranged in a symmetrical ring.(More)
MOTIVATION The CEBS data repository is being developed to promote a systems biology approach to understand the biological effects of environmental stressors. CEBS will house data from multiple gene expression platforms (transcriptomics), protein expression and protein-protein interaction (proteomics), and changes in low molecular weight metabolite levels(More)
TRAP (trp RNA-binding attenuation protein) regulates expression of the tryptophan biosynthetic genes in response to tryptophan in Bacillus subtilis by binding to two sites containing a series of 9 or 11 (G/U)AG triplet repeats that are generally separated by two or three spacer nucleotides. Previous mutagenesis experiments have identified three TRAP(More)
The Papillomavirus Episteme (PaVE) is a database of curated papillomavirus genomic sequences, accompanied by web-based sequence analysis tools. This update describes the addition of major new features. The papillomavirus genomes within PaVE have been further annotated, and now includes the major spliced mRNA transcripts. Viral genes and transcripts can be(More)
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