A Community Proposal to Integrate Structural
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Improving the Prediction of Transcription Factor Binding Sites To
Improving the prediction of transcription factor binding sites to aid the interpretation of non-coding single nucleotide variants. Narayan Jayaram Research Department of Structural and Molecular Biology University College London A thesis submitted to University College London for the degree of Doctor of Philosophy 1 Declaration I, Narayan Jayaram confirm that the work presented in this thesis is my own. Where information has been derived from other sources, I confirm that this has been indicated in the thesis. Narayan Jayaram 2 Abstract Single nucleotide variants (SNVs) that occur in transcription factor binding sites (TFBSs) can disrupt the binding of transcription factors and alter gene expression which can cause inherited diseases and act as driver SNVs in cancer. The identification of SNVs in TFBSs has historically been challenging given the limited number of experimentally characterised TFBSs. The recent ENCODE project has resulted in the availability of ChIP-Seq data that provides genome wide sets of regions bound by transcription factors. These data have the potential to improve the identification of SNVs in TFBSs. However, as the ChIP-Seq data identify a broader range of DNA in which a transcription factor binds, computational prediction is required to identify the precise TFBS. Prediction of TFBSs involves scanning a DNA sequence with a Position Weight Matrix (PWM) using a pattern matching tool. This thesis focusses on the prediction of TFBSs by: (a) evaluating a set of locally-installable pattern-matching tools and identifying the best performing tool (FIMO), (b) using the ENCODE ChIP-Seq data to evaluate a set of de novo motif discovery tools that are used to derive PWMs which can handle large volumes of data, (c) identifying the best performing tool (rGADEM), (d) using rGADEM to generate a set of PWMs from the ENCODE ChIP-Seq data and (e) by finally checking that the selection of the best pattern matching tool is not unduly influenced by the choice of PWMs. -
Applied Category Theory for Genomics – an Initiative
Applied Category Theory for Genomics { An Initiative Yanying Wu1,2 1Centre for Neural Circuits and Behaviour, University of Oxford, UK 2Department of Physiology, Anatomy and Genetics, University of Oxford, UK 06 Sept, 2020 Abstract The ultimate secret of all lives on earth is hidden in their genomes { a totality of DNA sequences. We currently know the whole genome sequence of many organisms, while our understanding of the genome architecture on a systematic level remains rudimentary. Applied category theory opens a promising way to integrate the humongous amount of heterogeneous informations in genomics, to advance our knowledge regarding genome organization, and to provide us with a deep and holistic view of our own genomes. In this work we explain why applied category theory carries such a hope, and we move on to show how it could actually do so, albeit in baby steps. The manuscript intends to be readable to both mathematicians and biologists, therefore no prior knowledge is required from either side. arXiv:2009.02822v1 [q-bio.GN] 6 Sep 2020 1 Introduction DNA, the genetic material of all living beings on this planet, holds the secret of life. The complete set of DNA sequences in an organism constitutes its genome { the blueprint and instruction manual of that organism, be it a human or fly [1]. Therefore, genomics, which studies the contents and meaning of genomes, has been standing in the central stage of scientific research since its birth. The twentieth century witnessed three milestones of genomics research [1]. It began with the discovery of Mendel's laws of inheritance [2], sparked a climax in the middle with the reveal of DNA double helix structure [3], and ended with the accomplishment of a first draft of complete human genome sequences [4]. -
SD Gross BFI0403
Janet Thornton Bioinformatician avant la lettre Michael Gross B ioinformatics is very much a buzzword of our time, with new courses and institutes dedicated to it sprouting up almost everywhere. Most significantly, the flood of genome data has raised the gen- eral awareness of the need to deve-lop new computational approaches to make sense of all the raw information collected. Professor Janet Thornton, the current director of the European Bioinformatics Institute (EBI), an EMBL outpost based at the Hinxton campus near Cambridge, has been in the field even before there was a word for it. Coming to structural biology with a physics degree from the University of Nottingham, she was already involved with computer-generated structural im- ages in the 1970s, when personal comput- ers and user-friendly programs had yet to be invented. The Early Years larities. Within 15 minutes, the software From there to the EBI, her remarkable Janet Thornton can check all 2.4 billion possible re- career appears to be organised in lationships and pick the ones relevant decades. During the 1970s, she did doc- software to compare structures to each to the question at hand. In comparison toral and post-doctoral research at other, recognise known folds and spot to publicly available bioinformatics the Molecular Biophysics Laboratory in new ones. Such work provides both packages such as Blast or Psiblast, Oxford and at the National Institute for fundamental insights into the workings Biopendium can provide an additional Medical Research in Mill Hill, near Lon- of evolution on a molecular level, and 30 % of annotation, according to Inphar- don. -
Functional Effects Detailed Research Plan
GeCIP Detailed Research Plan Form Background The Genomics England Clinical Interpretation Partnership (GeCIP) brings together researchers, clinicians and trainees from both academia and the NHS to analyse, refine and make new discoveries from the data from the 100,000 Genomes Project. The aims of the partnerships are: 1. To optimise: • clinical data and sample collection • clinical reporting • data validation and interpretation. 2. To improve understanding of the implications of genomic findings and improve the accuracy and reliability of information fed back to patients. To add to knowledge of the genetic basis of disease. 3. To provide a sustainable thriving training environment. The initial wave of GeCIP domains was announced in June 2015 following a first round of applications in January 2015. On the 18th June 2015 we invited the inaugurated GeCIP domains to develop more detailed research plans working closely with Genomics England. These will be used to ensure that the plans are complimentary and add real value across the GeCIP portfolio and address the aims and objectives of the 100,000 Genomes Project. They will be shared with the MRC, Wellcome Trust, NIHR and Cancer Research UK as existing members of the GeCIP Board to give advance warning and manage funding requests to maximise the funds available to each domain. However, formal applications will then be required to be submitted to individual funders. They will allow Genomics England to plan shared core analyses and the required research and computing infrastructure to support the proposed research. They will also form the basis of assessment by the Project’s Access Review Committee, to permit access to data. -
Characterization of TSET, an Ancient and Widespread Membrane
RESEARCH ARTICLE elifesciences.org Characterization of TSET, an ancient and widespread membrane trafficking complex Jennifer Hirst1*†, Alexander Schlacht2†, John P Norcott3‡, David Traynor4‡, Gareth Bloomfield4, Robin Antrobus1, Robert R Kay4, Joel B Dacks2*, Margaret S Robinson1* 1Cambridge Institute for Medical Research, University of Cambridge, Cambridge, United Kingdom; 2Department of Cell Biology, University of Alberta, Edmonton, Canada; 3Department of Engineering, University of Cambridge, Cambridge, United Kingdom; 4Cell Biology, MRC Laboratory of Molecular Biology, Cambridge, United Kingdom Abstract The heterotetrameric AP and F-COPI complexes help to define the cellular map of modern eukaryotes. To search for related machinery, we developed a structure-based bioinformatics tool, and identified the core subunits of TSET, a 'missing link' between the APs and COPI. Studies in Dictyostelium indicate that TSET is a heterohexamer, with two associated scaffolding proteins. TSET is non-essential in Dictyostelium, but may act in plasma membrane turnover, and is essentially identical to the recently described TPLATE complex, TPC. However, whereas TPC was reported to be plant-specific, we can identify a full or partial complex in every *For correspondence: jh228@ eukaryotic supergroup. An evolutionary path can be deduced from the earliest origins of the cam.ac.uk (JH); [email protected] (JBD); [email protected] (MSR) heterotetramer/scaffold coat to its multiple manifestations in modern organisms, including the mammalian muniscins, descendants of the TSET medium subunits. Thus, we have uncovered † These authors contributed the machinery for an ancient and widespread pathway, which provides new insights into early equally to this work eukaryotic evolution. ‡These authors also contributed DOI: 10.7554/eLife.02866.001 equally to this work Competing interests: The authors declare that no competing interests exist. -
Structure Prediction, Fold Recognition and Homology Modelling
Structure prediction, fold recognition and homology modelling Marjolein Thunnissen Lund September 2009 Steps in protein modelling Similarity search (BLAST) Multiple alignment 3-D structure known No Structure known Comparative Modelling Secondary structure prediction Fold recognition Ab initio (Rosetta) Structure Prediction 1) Prediction of secondary structure. a) Method of Chou and Fasman b) Neural networks c) hydrophobicity plots 2) Prediction of tertiary structure. a) Ab initio structure prediction b) Threading - 1D-3D profiles - Knowledge based potentials c) Homology modelling How does sequence identity correlate with structural similarity Analysis by Chotia and Lesk (89) • 100% sequence identity: rmsd = experimental error • <25% (twilight zone), structures might be similar but can also be different • Rigid body movements make rmsd bigger Secondary structure prediction: Take the sequence and, using rules derived from known structures, predict the secondary structure that is most likely to be adopted by each residue Why secondary structure prediction ? • A major part of the general folding prediction problem. • The first method of obtaining some structural information from a newly determined sequence. Rules governing !-helix and "-sheet structures provide guidelines for selecting specific mutations. • Assignment of sec. str. can help to confirm structural and functional relationship between proteins when sequences homology is weak (used in threading experiments). • Important in establishing alignments during model building by homology; the first step in attempts to generate 3D models Some interesting facts 2nd structure predictions • based on primary sequence only • accuracy 64% -75% • higher accuracy for !-helices than "! strands • accuracy is dependent on protein family • predictions of engineered proteins are less accurate Methods: •Statistical methods based on studies of databases of known protein structures from which structural propensities for all amino acids are calculated. -
Bioinformatics Approaches to Identify Pain Mediators, Novel Lncrnas and Distinct Modalities of Neuropathic Pain
Bioinformatics approaches to identify pain mediators, novel LncRNAs and distinct modalities of neuropathic pain by Georgios Baskozos A thesis submitted to University College London for the degree of Doctor of Philosophy Institute of Structural and Molecular Biology University College London September 2016 1 Declaration I, Georgios Baskozos, confirm that the work presented in this thesis is my own. Where information has been derived from other sources, I confirm that this has been indicated in the thesis. ……………………………………… Georgios Baskozos 29 September 2016 2 Abstract This thesis presents a number of studies in the general subject of bioinformatics and functional genomics. The studies were made in collaboration with experimental scientists of the London Pain Consortium (LPC), an initiative that has promoted collaborations between experimental and computational scientists to further understanding of pain. The studies are mainly concerned with the molecular biology of pain and deal with data gathered from high throughput technologies aiming to assess the transcriptional changes involved in well induced pain states, both from animal models of pain and human patients. We have analysed next generation sequencing data (NGS data) in order to assess the transcriptional changes in rodent’s dorsal root ganglions under well induced pain states. We have also developed a customised computational pipeline to analyse RNA- sequencing data in order to identify novel Long non-coding RNAs (LncRNAs), which may function as mediators of neuropathic pain. Our analyses detected hundreds of novel LncRNAs significantly dysregulated between sham-operated animals and animal models of pain. In addition, in order to gain valuable insights into neuropathic pain, including both its molecular signature, somatosensory profiles and clusters of individuals related to pain severity, we analysed clinical data together with data obtained from quality of life pain-questionnaires. -
Prolango: Protein Function Prediction Using Neural~ Machine
ProLanGO: Protein Function Prediction Using Neural Machine Translation Based on a Recurrent Neural Network Renzhi Cao Colton Freitas Department of Computer Science Department of Computer Science Pacific Lutheran University Pacific Lutheran University Tacoma, WA 98447 Tacoma, WA 98447 [email protected] [email protected] Leong Chan Miao Sun School of Business Baidu Inc. Pacific Lutheran University 1195 Bordeaux Dr, Sunnyvale, CA 94089, USA Tacoma, WA 98447 [email protected] [email protected] Haiqing Jiang Zhangxin Chen Hiretual Inc. School of electronic engineering San Jose, CA 95131, USA University of Electronic Science and Technology of China [email protected] Chengdu, 610051, China [email protected] Abstract With the development of next generation sequencing techniques, it is fast and cheap to determine protein sequences but relatively slow and expensive to extract useful information from protein sequences because of limitations of traditional biological experimental techniques. Protein function prediction has been a long standing challenge to fill the gap between the huge amount of protein sequences and the known function. In this paper, we propose a novel method to convert the protein function problem into a language translation problem by the new proposed protein sequence language “ProLan” to the protein function language “GOLan”, and build a neural machine translation model based on recurrent neural networks to translate “ProLan” language to “GOLan” language. We blindly tested our method by attending the latest third Critical Assessment of Function Annotation (CAFA arXiv:1710.07016v1 [q-bio.QM] 19 Oct 2017 3) in 2016, and also evaluate the performance of our methods on selected proteins whose function was released after CAFA competition. -
100000 Protein Structures for the Biologist
© 1998 Nature America Inc. • http://structbio.nature.com meeting review 100,000 protein structures for the biologist Andrej Sali˘ Structural genomics promises to deliver experimentally determined three-dimensional structures for many thousands of protein domains. These domains will be carefully selected, so that the methods of fold assignment and comparative protein structure modeling will result in useful models for most other protein sequences. The impact on biology will be dramatic. Recently, some 200 structural biologists archiving and annotation of the new struc- on the order of 10,000. As an alternative, it from both academia and industry gath- tures. Several pilot projects in structural has also been suggested that 100,000 protein ered in Avalon, New Jersey to explore the genomics that implement all of these steps structures need to be determined by experi- science and organization of the new field are already underway (Table 1). It is feasible ment (David Eisenberg, UCLA); this would of structural genomics1. The aim of the to determine at least 10,000 protein struc- allow calculation of models with higher structural genomics project is to deliver tures within the next five years. No new dis- accuracy than is possible with only 10,000 structural information about most pro- coveries or methods are needed for this known structures. After a list of the 30-seq teins. While it is not feasible to determine task. The average cost per structure is families is obtained, the representatives will the structure of every protein by experi- expected to decrease significantly from be picked and prioritized. A variety of dif- ment, useful models can be obtained by ~$200,000 per structure to perhaps less ferent criteria likely will be used for this fold assignment and comparative model- than $20,000 per structure. -
Gaëlle GARET Classification Et Caractérisation De Familles Enzy
No d’ordre : 000 ANNÉE 2015 60 THÈSE / UNIVERSITÉ DE RENNES 1 sous le sceau de l’Université Européenne de Bretagne pour le grade de DOCTEUR DE L’UNIVERSITÉ DE RENNES 1 Mention : Informatique École doctorale Matisse présentée par Gaëlle GARET préparée à l’unité de recherche Inria/Irisa – UMR6074 Institut de Recherche en Informatique et Système Aléatoires Composante universitaire : ISTIC Thèse à soutenir à Rennes Classification et le 16 décembre 2014 devant le jury composé de : caractérisation Jean-Christophe JANODET Professeur à l’Université d’Evry-Val-d’Essonne / Rapporteur de familles enzy- Amedeo NAPOLI Directeur de recherche au Loria, Nancy / Rapporteur Colin DE LA HIGUERA matiques à l’aide Professeur à l’Université de Nantes / Examinateur Olivier RIDOUX Professeur à l’Université de Rennes 1 / Examinateur de méthodes for- Mirjam CZJZEK Directrice de recherche CNRS, Roscoff / Examinatrice Jacques NICOLAS melles Directeur de recherche à Inria, Rennes / Directeur de thèse François COSTE Chargé de recherche à Inria, Rennes / Co-directeur de thèse Ainsi en était-il depuis toujours. Plus les hommes accumulaient des connaissances, plus ils prenaient la mesure de leur ignorance. Dan Brown, Le Symbole perdu Tu me dis, j’oublie. Tu m’enseignes, je me souviens. Tu m’impliques, j’apprends. Benjamin Franklin Remerciements Je remercie tout d’abord la région Bretagne et Inria qui ont permis de financer ce projet de thèse. Merci à Jean-Christophe Janodet et Amedeo Napoli qui ont accepté de rapporter cette thèse et à Olivier Ridoux, Colin De La Higuera et Mirjam Czjzek pour leur participation au jury. J’aimerais aussi dire un grand merci à mes deux directeurs de thèse : Jacques Ni- colas et François Coste, qui m’ont toujours apporté leur soutien tant dans le domaine scientifique que personnel. -
Glycoprotein Hormone Receptors in Sea Lamprey
University of New Hampshire University of New Hampshire Scholars' Repository Doctoral Dissertations Student Scholarship Fall 2007 Glycoprotein hormone receptors in sea lamprey (Petromyzon marinus): Identification, characterization and implications for the evolution of the vertebrate hypothalamic-pituitary-gonadal/thyroid axes Mihael Freamat University of New Hampshire, Durham Follow this and additional works at: https://scholars.unh.edu/dissertation Recommended Citation Freamat, Mihael, "Glycoprotein hormone receptors in sea lamprey (Petromyzon marinus): Identification, characterization and implications for the evolution of the vertebrate hypothalamic-pituitary-gonadal/ thyroid axes" (2007). Doctoral Dissertations. 395. https://scholars.unh.edu/dissertation/395 This Dissertation is brought to you for free and open access by the Student Scholarship at University of New Hampshire Scholars' Repository. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of University of New Hampshire Scholars' Repository. For more information, please contact [email protected]. GLYCOPROTEIN HORMONE RECEPTORS IN SEA LAMPREY (PETROMYZON MARI Nil S): IDENTIFICATION, CHARACTERIZATION AND IMPLICATIONS FOR THE EVOLUTION OF THE VERTEBRATE HYPOTHALAMIC-PITUITARY-GONADAL/THYROID AXES BY MIHAEL FREAMAT B.S. University of Bucharest, 1995 DISSERTATION Submitted to the University of New Hampshire in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy In Biochemistry September, 2007 Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. UMI Number: 3277139 INFORMATION TO USERS The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleed-through, substandard margins, and improper alignment can adversely affect reproduction. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. -
The Phyre2 Web Portal for Protein Modeling, Prediction and Analysis
PROTOCOL The Phyre2 web portal for protein modeling, prediction and analysis Lawrence A Kelley1, Stefans Mezulis1, Christopher M Yates1,2, Mark N Wass1,2 & Michael J E Sternberg1 1Structural Bioinformatics Group, Imperial College London, London, UK. 2Present addresses: University College London (UCL) Cancer Institute, London, UK (C.M.Y.); Centre for Molecular Processing, School of Biosciences, University of Kent, Kent, UK (M.N.W.). Correspondence should be addressed to L.A.K. ([email protected]). Published online 7 May 2015; doi:10.1038/nprot.2015.053 Phyre2 is a suite of tools available on the web to predict and analyze protein structure, function and mutations. The focus of Phyre2 is to provide biologists with a simple and intuitive interface to state-of-the-art protein bioinformatics tools. Phyre2 replaces Phyre, the original version of the server for which we previously published a paper in Nature Protocols. In this updated protocol, we describe Phyre2, which uses advanced remote homology detection methods to build 3D models, predict ligand binding sites and analyze the effect of amino acid variants (e.g., nonsynonymous SNPs (nsSNPs)) for a user’s protein sequence. Users are guided through results by a simple interface at a level of detail they determine. This protocol will guide users from submitting a protein sequence to interpreting the secondary and tertiary structure of their models, their domain composition and model quality. A range of additional available tools is described to find a protein structure in a genome, to submit large number of sequences at once and to automatically run weekly searches for proteins that are difficult to model.