Systems Biology


    Protocols in Current Issue
    Reference-free Association Mapping from Sequencing Reads Using k-mers
    Authors:  Zakaria Mehrab, Jaiaid Mobin, Ibrahim Asadullah Tahmid, Lior Pachter and Atif Rahman, date: 11/05/2020, view: 437, Q&A: 0
    [Abstract] Association mapping is the process of linking phenotypes with genotypes. In genome wide association studies (GWAS), individuals are first genotyped using microarrays or by aligning sequenced reads to reference genomes. However, both these approaches rely on reference genomes which limits their application to organisms with no or incomplete ...
    Low-cost and High-throughput RNA-seq Library Preparation for Illumina Sequencing from Plant Tissue
    Authors:  Marta Bjornson, Kaisa Kajala, Cyril Zipfel and Pingtao Ding, date: 10/20/2020, view: 714, Q&A: 0
    [Abstract] Transcriptome analysis can provide clues to biological processes affected in different genetic backgrounds or/and under various conditions. The price of RNA sequencing (RNA-seq) has decreased enough so that medium- to large-scale transcriptome analyses in a range of conditions are feasible. However, the price and variety of options for library ...
    Whole-genome Identification of Transcriptional Start Sites by Differential RNA-seq in Bacteria
    Authors:  Ramón Cervantes-Rivera and Andrea Puhar, date: 09/20/2020, view: 553, Q&A: 0
    [Abstract] Gene transcription in bacteria often starts some nucleotides upstream of the start codon. Identifying the specific Transcriptional Start Site (TSS) is essential for genetic manipulation, as in many cases upstream of the start codon there are sequence elements that are involved in gene expression regulation. Taken into account the classical gene ...
    BRIDGE: An Open Platform for Reproducible Protein-Ligand Simulations and Free Energy of Binding Calculations
    Authors:  Tharindu Senapathi, Christopher B. Barnett and Kevin J. Naidoo, date: 09/05/2020, view: 1540, Q&A: 0
    [Abstract] Protein-ligand binding prediction is central to the drug-discovery process. This often follows an analysis of genomics data for protein targets and then protein structure discovery. However, the complexity of performing reproducible protein conformational analysis and ligand binding calculations, using vetted methods and protocols can be a ...
    Metabolomic and Lipidomic Analysis of Bone Marrow Derived Macrophages
    Authors:  Gretchen L. Seim, Steven V. John and Jing Fan, date: 07/20/2020, view: 1044, Q&A: 0
    [Abstract] Macrophages are highly plastic immune cells that are capable of adopting a wide array of functional phenotypes in response to environmental stimuli. The changes in macrophage function are often supported and regulated by changes in cellular metabolism. Capturing a comprehensive picture of metabolism is vital for understanding the role of metabolic ...
    HoSeIn: A Workflow for Integrating Various Homology Search Results from Metagenomic and Metatranscriptomic Sequence Datasets
    Authors:  Gaston Rozadilla, Jorgelina Moreiras Clemente and Christina B. McCarthy, date: 07/20/2020, view: 728, Q&A: 0
    [Abstract] Data generated by metagenomic and metatranscriptomic experiments is both enormous and inherently noisy. When using taxonomy-dependent alignment-based methods to classify and label reads, the first step consists in performing homology searches against sequence databases. To obtain the most information from the samples, nucleotide sequences are ...
    Low-cost and Multiplexable Whole mRNA-Seq Library Preparation Method with Oligo-dT Magnetic Beads for Illumina Sequencing Platforms
    Authors:  Makoto Kashima, Ayumi Deguchi, Ayumi Tezuka and Atsushi J. Nagano, date: 06/20/2020, view: 1709, Q&A: 0
    [Abstract] RNA-Seq is a powerful method for transcriptome analysis used in varied field of biology. Although several commercial products and hand-made protocols enable us to prepare RNA-Seq library from total RNA, their cost are still expensive. Here, we established a low-cost and multiplexable whole mRNA-Seq library preparation method for illumine ...
    HIV-CRISPR: A CRISPR/Cas9 Screening Method to Identify Genes Affecting HIV Replication
    Authors:  Ferdinand Roesch and Molly OhAinle, date: 05/05/2020, view: 1379, Q&A: 0
    [Abstract] Screening with CRISPR/Cas9 technology has already led to significant discoveries in the fields of cancer biology, cell biology and virology. Because of the relatively low false discovery rates and the ability to perform high-throughput, pooled approaches, it has rapidly become the assay of choice for screening studies, including whole-genome ...
    Sequence Alignment Using Machine Learning for Accurate Template-based Protein Structure Prediction
    Authors:  Shuichiro Makigaki and Takashi Ishida, date: 05/05/2020, view: 1435, Q&A: 0
    [Abstract] Template-based modeling, the process of predicting the tertiary structure of a protein by using homologous protein structures, is useful when good templates can be available. Indeed, modern homology detection methods can find remote homologs with high sensitivity. However, the accuracy of template-based models generated from the ...
    Circadian Gene Profiling in Laser Capture Microdissected Mouse Club Cells
    Authors:  Zhenguang Zhang and Andrew Loudon, date: 04/20/2020, view: 1154, Q&A: 0
    [Abstract] Cell heterogeneity is high in tissues like lung. Research conducted on pure population of cells usually offers more insights than bulk tissues, such as circadian clock work. In this protocol, we provide a detailed work flow on how to do circadian clock study by RNA seq in laser capture micro-dissected mouse lung club cells. The method uses frozen ...

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