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M Jafar Taghiyar, Jamie Rosner, Diljot Grewal, Bruno M Grande, Radhouane Aniba, Jasleen Grewal, Paul C Boutros, Ryan D Morin, Ali Bashashati, Sohrab P Shah
Background: The field of next generation sequencing informatics has matured to a point where algorithmic advances in sequence alignment and individual feature detection methods have stabilized. Practical and robust implementation of complex analytical workflows (where such tools are structured into 'best practices' for automated analysis of NGS datasets) still requires significant programming investment and expertise. Results: We present Kronos , a software platform for facilitating the development and execution of modular, auditable and distributable bioinformatics workflows...
June 26, 2017: GigaScience
Qing He, Yuan Gao, Zhuye Jie, Xinlei Yu, Janne Marie Laursen, Liang Xiao, Ying Li, Lingling Li, Faming Zhang, Qiang Feng, Xiaoping Li, Jinghong Yu, Chuan Liu, Ping Lan, Ting Yan, Xin Liu, Xun Xu, Huanming Yang, Jian Wang, Lise Madsen, Susanne Brix, Jianping Wang, Karsten Kristiansen, Huijue Jia
Background: The inflammatory intestinal disorder Crohn's disease (CD) has become a health challenge worldwide. The gut microbiota closely interacts with the host immune system, but its functional impact in CD is unclear. Except for studies on a small number of CD patients, analyses of the gut microbiota in CD have used 16S rDNA amplicon sequencing. Here we employed metagenomic shotgun sequencing to provide a detailed characterization of the compositional and functional features of the CD microbiota, comprising also unannotated bacteria, and investigated its modulation by exclusive enteral nutrition (EEN)...
June 26, 2017: GigaScience
Dongyan Zhao, John P Hamilton, Gina M Pham, Emily Crisovan, Krystle Wiegert-Rininger, Brieanne Vaillancourt, Dean DellaPenna, C Robin Buell
Camptotheca acuminata is 1 of a limited number of species that produce camptothecin, a pentacyclic quinoline alkaloid with anti-cancer activity due to its ability to inhibit DNA topoisomerase. While transcriptome studies have been performed previously with various camptothecin-producing species, no genome sequence for a camptothecin-producing species is available to date. We generated a high-quality de novo genome assembly for C. acuminata representing 403 174 860 bp on 1394 scaffolds with an N50 scaffold size of 1752 kbp...
September 1, 2017: GigaScience
Gregory D Marquart, Kathryn M Tabor, Eric J Horstick, Mary Brown, Alexandra K Geoca, Nicholas F Polys, Damian Dalle Nogare, Harold A Burgess
Atlases provide a framework for spatially mapping information from diverse sources into a common reference space. Specifically, brain atlases allow annotation of gene expression, cell morphology, connectivity, and activity. In larval zebrafish, advances in genetics, imaging, and computational methods now allow the collection of such information brain-wide. However, due to technical considerations, disparate datasets may use different references and may not be aligned to the same coordinate space. Two recent larval zebrafish atlases exemplify this problem: Z-Brain, containing gene expression, neural activity, and neuroanatomical segmentations, was acquired using immunohistochemical stains, while the Zebrafish Brain Browser (ZBB) was constructed from live scans of fluorescent reporters in transgenic larvae...
August 1, 2017: GigaScience
Ya-Shu Kuang, Jin-Hua Lu, Sheng-Hui Li, Jun-Hua Li, Ming-Yang Yuan, Jian-Rong He, Nian-Nian Chen, Wan-Qing Xiao, Song-Ying Shen, Lan Qiu, Ying-Fang Wu, Cui-Yue Hu, Yan-Yan Wu, Wei-Dong Li, Qiao-Zhu Chen, Hong-Wen Deng, Christopher J Papasian, Hui-Min Xia, Xiu Qiu
The human gut microbiome can modulate metabolic health and affect insulin resistance, and it may play an important role in the etiology of gestational diabetes mellitus (GDM). Here, we compared the gut microbial composition of 43 GDM patients and 81 healthy pregnant women via whole-metagenome shotgun sequencing of their fecal samples, collected at 21-29 weeks, to explore associations between GDM and the composition of microbial taxonomic units and functional genes. A metagenome-wide association study identified 154 837 genes, which clustered into 129 metagenome linkage groups (MLGs) for species description, with significant relative abundance differences between the 2 cohorts...
August 1, 2017: GigaScience
Do-Hwan Ahn, Seung Chul Shin, Bo-Mi Kim, Seunghyun Kang, Jin-Hyoung Kim, Inhye Ahn, Joonho Park, Hyun Park
The Antarctic bathydraconid dragonfish, Parachaenichthys charcoti, is an Antarctic notothenioid teleost endemic to the Southern Ocean. The Southern Ocean has cooled to -1.8ºC over the past 30 million years, and the seawater had retained this cold temperature and isolated oceanic environment because of the Antarctic Circumpolar Current. Notothenioids dominate Antarctic fish, making up 90% of the biomass, and all notothenioids have undergone molecular and ecological diversification to survive in this cold environment...
August 1, 2017: GigaScience
Faezah Mohd Salleh, Jazmín Ramos-Madrigal, Fernando Peñaloza, Shanlin Liu, S Sinding Mikkel-Holger, P Patel Riddhi, Renata Martins, Dorina Lenz, Jörns Fickel, Christian Roos, Mohd Shahir Shamsir, Mohammad Shahfiz Azman, K Lim Burton, J Rossiter Stephen, Andreas Wilting, M Thomas P Gilbert
Southeast (SE) Asia is 1 of the most biodiverse regions in the world, and it holds approximately 20% of all mammal species. Despite this, the majority of SE Asia's genetic diversity is still poorly characterized. The growing interest in using environmental DNA to assess and monitor SE Asian species, in particular threatened mammals-has created the urgent need to expand the available reference database of mitochondrial barcode and complete mitogenome sequences. We have partially addressed this need by generating 72 new mitogenome sequences reconstructed from DNA isolated from a range of historical and modern tissue samples...
August 1, 2017: GigaScience
Xiaodong Du, Guangyi Fan, Yu Jiao, He Zhang, Ximing Guo, Ronglian Huang, Zhe Zheng, Chao Bian, Yuewen Deng, Qingheng Wang, Zhongduo Wang, Xinming Liang, Haiying Liang, Chengcheng Shi, Xiaoxia Zhao, Fengming Sun, Ruijuan Hao, Jie Bai, Jialiang Liu, Wenbin Chen, Jinlian Liang, Weiqing Liu, Zhe Xu, Qiong Shi, Xun Xu, Guofan Zhang, Xin Liu
Nacre, the iridescent material found in pearls and shells of molluscs, is formed through an extraordinary process of matrix-assisted biomineralization. Despite recent advances, many aspects of the biomineralization process and its evolutionary origin remain unknown. The pearl oyster Pinctada fucata martensii is a well-known master of biomineralization, but the molecular mechanisms that underlie its production of shells and pearls are not fully understood. We sequenced the highly polymorphic genome of the pearl oyster and conducted multi-omic and biochemical studies to probe nacre formation...
August 1, 2017: GigaScience
Christopher M Austin, Mun Hua Tan, Katherine A Harrisson, Yin Peng Lee, Laurence J Croft, Paul Sunnucks, Alexandra Pavlova, Han Ming Gan
One of the most iconic Australian fish is the Murray cod, Maccullochella peelii (Mitchell 1838), a freshwater species that can grow to ∼1.8 metres in length and live to age ≥48 years. The Murray cod is of a conservation concern as a result of strong population contractions, but it is also popular for recreational fishing and is of growing aquaculture interest. In this study, we report the whole genome sequence of the Murray cod to support ongoing population genetics, conservation, and management research, as well as to better understand the evolutionary ecology and history of the species...
August 1, 2017: GigaScience
Xuefang Zhao, Alexandra M Weber, Ryan E Mills
Although numerous algorithms have been developed to identify structural variations (SVs) in genomic sequences, there is a dearth of approaches that can be used to evaluate their results. This is significant as the accurate identification of structural variation is still an outstanding but important problem in genomics. The emergence of new sequencing technologies that generate longer sequence reads can, in theory, provide direct evidence for all types of SVs regardless of the length of the region through which it spans...
August 1, 2017: GigaScience
Jinjie Duan, Kristian Wejse Sanggaard, Leif Schauser, Sanne Enok Lauridsen, Jan J Enghild, Mikkel Heide Schierup, Tobias Wang
Exceptional and extreme feeding behaviour makes the Burmese python (Python bivittatus) an interesting model to study physiological remodelling and metabolic adaptation in response to refeeding after prolonged starvation. In this study, we used transcriptome sequencing of 5 visceral organs during fasting as well as 24 hours and 48 hours after ingestion of a large meal to unravel the postprandial changes in Burmese pythons. We first used the pooled data to perform a de novo assembly of the transcriptome and supplemented this with a proteomic survey of enzymes in the plasma and gastric fluid...
August 1, 2017: GigaScience
Hshin-Ping Wu, Fu-Jin Wei, Cheng-Chieh Wu, Shuen-Fang Lo, Liang-Jwu Chen, Ming-Jen Fan, Shu Chen, Ien-Chie Wen, Su-May Yu, Tuan-Hua David Ho, Ming-Hsin Lai, Yue-Ie C Hsing
Rice, Oryza sativa L., is one of the most important crops in the world. With the rising world population, feeding people in a more sustainable and environmentally friendly way becomes increasingly important. Therefore, the rice research community needs to share resources to better understand the functions of rice genes that are the foundation for future agricultural biotechnology development, and one way to achieve this goal is via the extensive study of insertional mutants. We have constructed a large rice insertional mutant population in a japonica rice variety, Tainung 67...
August 1, 2017: GigaScience
Baekdoo Kim, Thahmina Ali, Carlos Lijeron, Enis Afgan, Konstantinos Krampis
Processing of next-generation sequencing (NGS) data requires significant technical skills, involving installation, configuration, and execution of bioinformatics data pipelines, in addition to specialized postanalysis visualization and data mining software. In order to address some of these challenges, developers have leveraged virtualization containers toward seamless deployment of preconfigured bioinformatics software and pipelines on any computational platform. We present an approach for abstracting the complex data operations of multistep, bioinformatics pipelines for NGS data analysis...
August 1, 2017: GigaScience
Sarah Siu Tze Mak, Shyam Gopalakrishnan, Christian Carøe, Chunyu Geng, Shanlin Liu, Mikkel-Holger S Sinding, Lukas F K Kuderna, Wenwei Zhang, Shujin Fu, Filipe G Vieira, Mietje Germonpré, Hervé Bocherens, Sergey Fedorov, Bent Petersen, Thomas Sicheritz-Pontén, Tomas Marques-Bonet, Guojie Zhang, Hui Jiang, M Thomas P Gilbert
Ancient DNA research has been revolutionized following development of next-generation sequencing platforms. Although a number of such platforms have been applied to ancient DNA samples, the Illumina series are the dominant choice today, mainly because of high production capacities and short read production. Recently a potentially attractive alternative platform for palaeogenomic data generation has been developed, the BGISEQ-500, whose sequence output are comparable with the Illumina series. In this study, we modified the standard BGISEQ-500 library preparation specifically for use on degraded DNA, then directly compared the sequencing performance and data quality of the BGISEQ-500 to the Illumina HiSeq2500 platform on DNA extracted from 8 historic and ancient dog and wolf samples...
August 1, 2017: GigaScience
Reza M Salek, Pablo Conesa, Keeva Cochrane, Kenneth Haug, Mark Williams, Namrata Kale, Pablo Moreno, Kalai Vanii Jayaseelan, Jose Ramon Macias, Venkata Chandrasekhar Nainala, Robert D Hall, Laura K Reed, Mark R Viant, Claire O'Donovan, Christoph Steinbeck
Following similar global efforts to exchange genomic and other biomedical data, global databases in metabolomics have now been established. MetaboLights, the first general purpose, publically available, cross-species, cross-application database in metabolomics, has become the fastest growing data repository at the European Bioinformatics Institute in terms of data volume. Here we present the automated assembly of species metabolomes in MetaboLights, a crucial reference for chemical biology, which is growing through user submissions...
August 1, 2017: GigaScience
Vaja Liluashvili, Selim Kalayci, Eugene Fluder, Manda Wilson, Aaron Gabow, Zeynep H Gümüs
Visualizations of biomolecular networks assist in systems-level data exploration in many cellular processes. Data generated from high-throughput experiments increasingly inform these networks, yet current tools do not adequately scale with concomitant increase in their size and complexity. We present an open source software platform, interactome-CAVE (iCAVE), for visualizing large and complex biomolecular interaction networks in 3D. Users can explore networks (i) in 3D using a desktop, (ii) in stereoscopic 3D using 3D-vision glasses and a desktop, or (iii) in immersive 3D within a CAVE environment...
August 1, 2017: GigaScience
Elodie Modave, Anna J MacDonald, Stephen D Sarre
Identification of species from trace samples is now possible through the comparison of diagnostic DNA fragments against reference DNA sequence databases. DNA detection of animals from non-invasive samples, such as predator faeces (scats) that contain traces of DNA from their species of origin, has proved to be a valuable tool for the management of elusive wildlife. However, application of this approach can be limited by the availability of appropriate genetic markers. Scat DNA is often degraded, meaning that longer DNA sequences, including standard DNA barcoding markers, are difficult to recover...
August 1, 2017: GigaScience
Petra Ten Hoopen, Robert D Finn, Lars Ailo Bongo, Erwan Corre, Bruno Fosso, Folker Meyer, Alex Mitchell, Eric Pelletier, Graziano Pesole, Monica Santamaria, Nils Peder Willassen, Guy Cochrane
Metagenomics data analyses from independent studies can only be compared if the analysis workflows are described in a harmonized way. In this overview, we have mapped the landscape of data standards available for the description of essential steps in metagenomics: (i) material sampling, (ii) material sequencing, (iii) data analysis, and (iv) data archiving and publishing. Taking examples from marine research, we summarize essential variables used to describe material sampling processes and sequencing procedures in a metagenomics experiment...
August 1, 2017: GigaScience
Hansheng Zhao, Shancen Zhao, Benhua Fei, Huan Liu, Huanming Yang, Honghai Dai, Dan Wang, Wei Jin, Feng Tang, Qiang Gao, Hang Xun, Yuwei Wang, Lianghua Qi, Xianghua Yue, Shuyan Lin, Lianfeng Gu, Lubin Li, Tiansheng Zhu, Qiang Wei, Zhen Su, Tarmeze Bin Wan Ariffin Wan, Daniel A Ofori, George Mbeva Muthike, Yigardu Mulatu Mengesha, Roberto Magno de Castro E Silva, Antonio Ludovico Beraldo, Zhimin Gao, Xin Liu, Zehui Jiang
Bamboo and rattan are widely grown for manufacturing, horticulture, and agroforestry. Bamboo and rattan production might help reduce poverty, boost economic growth, mitigate climate change, and protect the natural environment. Despite progress in research, sufficient molecular and genomic resources to study these species are lacking. We launched the Genome Atlas of Bamboo and Rattan (GABR) project, a comprehensive, coordinated international effort to accelerate understanding of BR genetics through genome analysis...
June 16, 2017: GigaScience
Ruibang Luo, Michael C Schatz, Steven L Salzberg
16GT is a variant caller for Illumina whole-genome and whole-exome sequencing data. It uses a new 16-genotype probabilistic model to unify SNP and indel calling in a single variant calling algorithm. In benchmark comparisons with five other widely used variant callers on a modern 36-core server, 16GT demonstrated improved sensitivity in calling SNPs, and it provided comparable sensitivity and accuracy for calling indels as compared to the GATK HaplotypeCaller. 16GT is available at
June 15, 2017: GigaScience
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