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REFINEMENT: A search framework for the identification of interferon-responsive elements in DNA sequences – a case study with ISRE and GAS

Paper ID Volume ID Publish Year Pages File Format Full-Text
15507 1419 2006 14 PDF Available
Title
REFINEMENT: A search framework for the identification of interferon-responsive elements in DNA sequences – a case study with ISRE and GAS
Abstract

Interferons (IFN) are a family of pleiotropic secreted proteins that play a key role in mediating antiviral and apoptotic responses, and in immune modulation. Interferons induce a large number of genes through activating the janus tyrosine kinase (JAK)–signal transducers and activators of transcription proteins (STAT) pathway, and the binding of transcription factors to upstream regions of the inducible genes (interferon-stimulated gene, ISG) at specific DNA regulatory elements known as interferon-stimulated response element (ISRE) and gamma-activated sequence (GAS). We have previously performed DNA micro-arrays on peripheral blood mononuclear cells (PBMC) treated with interferon-α in culture and showed that approximately 700 genes are significantly modulated (P ≤ 0.001). In order to search for ISRE and GAS we have developed a framework called regulatory element finding with iteration and effective model refinement (REFINEMENT) using an existing program (HMMER) and a standard discriminating scoring technique. Although REFINEMENT uses existing programs, our framework itself is novel as it effectively discriminates occurrences using an iterative model refinement technique. REFINEMENT has detected either ISRE or GAS sequence in all of the genes shown to be induced at a P-value ≤ 0.001. There were far more functional occurrences in ISRE than in GAS, suggesting that ISRE plays a greater role in response to interferon-α than GAS sequences. This method can be used to identify such sequences in any set of genes. REFINEMENT is non-commercial and is accessible at http://cancer.informatics.indiana.edu/ttsukaha/miltonlab/refinement/.

Keywords
Interferon; ISRE; GAS
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REFINEMENT: A search framework for the identification of interferon-responsive elements in DNA sequences – a case study with ISRE and GAS
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Publisher
Database: Elsevier - ScienceDirect
Journal: Computational Biology and Chemistry - Volume 30, Issue 2, April 2006, Pages 134–147
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us