Uman Enome News

Total Page:16

File Type:pdf, Size:1020Kb

Uman Enome News uman enome news ISSN: 1050-6101 Vol. 6, No.3, September 1994 Managing Genome Sequence Data Collaborative Databases Serve Worldwide Research Community s technology improves and information accumulates exponentially, continued progress Historical Ain the Human Genome Project will depend increasingly on the development of sophisti­ cated computational tools and resources to manage and interpret data. Various systems now Perspective, manage data relevant to genome research; these systems range from highly specialized Current Status, databases supporting local research projects to general databases serving the entire inter­ Future national community both as repositories and analysis resources that guide ongoing research. Challenges Examined Public databases containing the nucleotide Database growth is accelerating rapidly, with sequences of the complete human genome and more than half the sequences having been of selected model organism genomes will be a added in the last 2 years. This number is major product of the Human Genome Project. expected to rise dramatically within the next The ease with which researchers can retrieve decade to about 10 billion bp. As more genes and use the data from these and other related are identified and sequenced and understanding databases will provide one measure of the of sequence data improves, databases will play projecrs success. an increasing role in capturing new knowledge and making it accessible. Although much progress has been made in data­ base development and operation, many chal­ Sequence Database History lenges remain in collecting, organizing, storing, and distributing data. As maps and sequences The Los Alamos Sequence Ubrary was estab­ accumulate and the focus shifts from data gen­ lished in 1979 at the DOE Los Alamos National eration to analysis, new challenges will arise. Laboratory (LANL) to store DNA sequence data Some feel that a key task will be to link the vari­ in electronic form. At about the same time, data­ ous biological databases into a loosely coupled base activities were beginning at EMBL, and distributed alliance so researchers around the world can explore all relevant facets of a particu­ lar topic. Research and development for these interoperable databases demand the close inter­ action of biologists with mathematicians, soft­ In This Issue... ware engineers, and programmers to develop Page Genome News the needed software, database tools, opera­ 1 Managing Genome Sequence Data tional infrastructure, and algorithms. 2 Breast Cancer Gene Found 5 Whitehead, Genethon Groups Present New Linkage Map Four major nucleotide sequence databases now 7 OHER Launches Microbial Genome Initiative store almost 200 million bp representing human and more than 8000 other species. The four are 7 Evans Moves NIH Genome Center to Dallas GenBank® and Genome Sequence Data Base 8 DOE Biomarker Workshop Meets In Santa F. (GSDB) in the United States, European Molecu­ 10 DOE ELSI Program Enters Fifth Year lar Biology Laboratory (EMBL) Nucleotide 11 GDB Forum: Medllne Citations; Graphicallnte/faces; Sprintnet Sequence Database, and the DNA Data Bank of Access; OMIM on WWW; User Support, Registration, Training Japan (DDBJ). Each group collects a portion of 12 Chromosome 16 Mappers Review Status the total sequence data reported worldwide, often 13 Chromosome Editors (Nomenclature Committee) procesSing submissions and update requests For Your Information within 48 hours. Because they exchange new 3 Resources (see s/so p. 7) and updated sequences frequently-usually 6 Publlcalfons (see ./50 p_ 13) daily-the databases contain the same 14 Catendars of Genome-Related Events, Training sequences, each in its own format. All four of these evolving databases are working to 15 Funding Announcements, Guidelines for U.S. Genome Research improve data design and quality. 16 Subscrlption/Document Request; Selected Acronyms 2 Human Genome News, September 1994 Genome News discussions began in 1982 on collaborations The LANL data library evolved into the data­ between the two institutions. From these early base GenBank when in 1982 Bolt, Beranek, days, EMBL and LANL agreed that any data sub­ and Newman (BBN) became the primary con­ mitted to or entered by one group would be for­ tractor lor distribution of data and user support. warded immediately to the other, thus avoiding LANL became a subcontractor to BBN, provid­ duplication of effort. As other sequence data­ ing data collection and deSign. Sequence data bases joined the collaboration, data sharing was activities at BBN and LANL were funded by the extended to them. NIH National Institute of General Medical Sci­ ences (NIGMS) with support from DOE and other agencies. At the end of the first 5-year con­ tract, IntelliGenetics became the primary contrac­ tor, with LANL again as subcontractor charged with designing and building the database. Breast Cancer Gene Found With the conclusion of the second S-year con­ tract in October 1992, NIGMS transferred its team of some 45 researchers led by Mark Skolnick (Univer­ responsibility for the GenBank project to the Asity of Utah Medical Center and Myriad Genetics, Inc.) and National Center for Biotechnology Information Roger Wiseman (NIH National Institute 01 Environmental Health (NCB I) at the National Library of Medicine. Sciences, North Carolina) reported on September 14 the isolation NCBI, directed by David Lipman, had been of the BRCA 1 gene. Defective forms 01 BRCA1 are thought to created in November 1988 to develop auto­ cause predisposition to certain inherited forms of breast and ovar­ mated information systems for supporting ian cancer. Scientists have been searching for BRCA 1 in a 600-kb biotechnology and molecular biology and to region since 1 990, when Mary-Claire King's group (University 01 conduct basic research in computational molecular biology. LANL continued to handle California, Berkeley) demonstrated a pattern 01 genetic markers in all direct GenBank submissions and updates families where breast cancer occurred unusually early and frequently. through a DOE-NIH interagency agreement. Two papers describing the discovery appear in the October 7 issue of In August 1993 the data resources at LANL and Science, and a separate study on the approximate location of another NCBI became independent of each other, with gene associated with breast cancer-BRCA2-was published in the both providing collection and distribution serv­ September 30 issue. The 100-kb BRCA 1 gene is composed of 21 coding ices and continuing to enhance access and exons midway between markers D17S1321 and D17S1325 on the chro­ usability of the databases. The GenBank data­ mosome 17 long arm. Isolation of this gene could lead to significant clues base remained at NCBI, and the LANL service about the risk of developing cancer, not only of the breast and ovaries, but also of the colon and prostate gland. led by Michael Cinkosky took the new name of Genome Sequence Data Base (GSDB). GSDB Although these discoveries are considered very important for studying the recently moved to the National Center for disease and eventually developing new diagnostic tools and treatments, Genome Resources (NCGR) in Santa Fe, New scientists warned that much work lies ahead. NIH Director Harold Varmus Mexico, which focuses on the development of said at a press conference that breast and ovarian cancers are extremely resource projects to support public and private complicated diseases that are probably affected by various genetic and genome research. environmental factors. Several NIH entities, led by the National Center for Human Genome Research, have recently awarded research groups more The EMBL Nucleotide Sequence Database was than $2.5 million to study breast cancer testing and the social, psychologi­ established in 1982 as the EMBL Data Library cal, and economic implications of such tests. in Heidelberg, Germany. Directed by Graham Cameron, the database is now maintained and More than 45,000 U.S. women and 300 men died of breast cancer last distributed by the European Bioinformaticslnsti­ year. BRCA 1 is linked to about 5% of the 180,000 breast cancer cases tute (EBI), a new EMBL outstation at Hinxton diagnosed annually in the United States and to 25% of those in women Hall near Cambridge, U.K. The Sanger Centre under the age of 30. About 600,000 U.S. women and millions around the and the Medical Research Council's Human world may carry BRCA1 mutations. Genome Mapping Program Resource Centre Tumor Suppressor are also located at the site. In addition to the Nucleotide Sequence Database, EBr maintains BRCA 1 is believed to act as a tumor suppressor regulating cell growth and division. II suppressor genes are lost or damaged by mutation, uncon­ and distributes the SWISS-PROT Protein trolled cell growth can occur, resulting in cancer. Researchers reported Sequence Database in collaboration with finding several different mutations in all family members who inherited the Amos Bairoch (University of Geneva) as well faulty BRCA 1 gene and in those who developed breast cancer at an early as more than 30 other specialty databases. age; they also observed the mutation in many women with both breast DDBJ was created in 1984 and began operat­ and ovarian cancers. Before diagnostic tests can be developed to detect ing independently in 1986 with the sponsorship the aberrant gene, each specific mutation must first be identified. of the Japanese Ministry of Education, Science, Although inheriting a mutated BRCA 1 gene was found to increase dramati­ and Culture and representative
Recommended publications
  • WARS Recombinant Protein Description Product Info
    9853 Pacific Heights Blvd. Suite D. San Diego, CA 92121, USA Tel: 858-263-4982 Email: [email protected] 32-2929: WARS Recombinant Protein Alternative GAMMA-2,IFI53,IFP53,WRS,WARS,TrpRS,hWRS,EC=6.1.1.2,Tryptophanyl-tRNA synthetase,Interferon- Name : induced protein 53,Tryptophan--tRNA ligase,GAMMA-2. Description Source : Escherichia Coli. WARS Recombinant Human produced in E.Coli is a single, non-glycosylated polypeptide chain containing 491 amino acids (1-471 a.a.) and having a molecular mass of 55.3 kDa. The WARS is fused to a 20 amino acid His- Tag at N-terminus and purified by proprietary chromatographic techniques. WARS is part of the class I tRNA synthetase family. 2 types of tryptophanyl tRNA synthetase exist, a cytoplasmic form, called WARS, and a mitochondrial form, called WARS2. WARS catalyzes the aminoacylation of tRNA(trp) with tryptophan and is induced by interferon. WARS controls ERK, Akt, and eNOS activation pathways that are related with angiogenesis, cytoskeletal reorganization and shear stress-responsive gene expression. Product Info Amount : 25 µg Purification : Greater than 90.0% as determined by SDS-PAGE. 1mg/ml solution containing 20mM Tris-HCl pH-8, 1mM DTT, 0.1M NaCl, 1mM DTT & 10% Content : glycerol. Store at 4°C if entire vial will be used within 2-4 weeks. Store, frozen at -20°C for longer periods of Storage condition : time. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).Avoid multiple freeze-thaw cycles. Amino Acid : MGSSHHHHHH SSGLVPRGSH MPNSEPASLL ELFNSIATQG ELVRSLKAGN ASKDEIDSAV KMLVSLKMSY KAAAGEDYKA DCPPGNPAPT SNHGPDATEA EEDFVDPWTV QTSSAKGIDY DKLIVRFGSS KIDKELINRI ERATGQRPHH FLRRGIFFSH RDMNQVLDAY ENKKPFYLYT GRGPSSEAMH VGHLIPFIFT KWLQDVFNVP LVIQMTDDEK YLWKDLTLDQ AYSYAVENAK DIIACGFDIN KTFIFSDLDY MGMSSGFYKN VVKIQKHVTF NQVKGIFGFT DSDCIGKISF PAIQAAPSFS NSFPQIFRDR TDIQCLIPCA IDQDPYFRMT RDVAPRIGYP KPALLHSTFF PALQGAQTKM SASDPNSSIF LTDTAKQIKT KVNKHAFSGG RDTIEEHRQF GGNCDVDVSF MYLTFFLEDD DKLEQIRKDY TSGAMLTGEL KKALIEVLQP LIAEHQARRK EVTDEIVKEF MTPRKLSFDF Q.
    [Show full text]
  • DNA Sequencing and Sorting: Identifying Genetic Variations
    BioMath DNA Sequencing and Sorting: Identifying Genetic Variations Student Edition Funded by the National Science Foundation, Proposal No. ESI-06-28091 This material was prepared with the support of the National Science Foundation. However, any opinions, findings, conclusions, and/or recommendations herein are those of the authors and do not necessarily reflect the views of the NSF. At the time of publishing, all included URLs were checked and active. We make every effort to make sure all links stay active, but we cannot make any guaranties that they will remain so. If you find a URL that is inactive, please inform us at [email protected]. DIMACS Published by COMAP, Inc. in conjunction with DIMACS, Rutgers University. ©2015 COMAP, Inc. Printed in the U.S.A. COMAP, Inc. 175 Middlesex Turnpike, Suite 3B Bedford, MA 01730 www.comap.com ISBN: 1 933223 71 5 Front Cover Photograph: EPA GULF BREEZE LABORATORY, PATHO-BIOLOGY LAB. LINDA SHARP ASSISTANT This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties. DNA Sequencing and Sorting: Identifying Genetic Variations Overview Each of the cells in your body contains a copy of your genetic inheritance, your DNA which has been passed down to you, one half from your biological mother and one half from your biological father. This DNA determines physical features, like eye color and hair color, and can determine susceptibility to medical conditions like hypertension, heart disease, diabetes, and cancer.
    [Show full text]
  • The Structure, Stability and Pheromone Binding of the Male Mouse Protein Sex Pheromone Darcin
    The Structure, Stability and Pheromone Binding of the Male Mouse Protein Sex Pheromone Darcin Marie M. Phelan1, Lynn McLean2, Stuart D. Armstrong2, Jane L. Hurst3, Robert J. Beynon2, Lu-Yun Lian1* 1 NMR Centre for Structural Biology, Institute of Integrative Biology, University of Liverpool, Liverpool, United Kingdom, 2 Protein Function Group, Institute of Integrative Biology, University of Liverpool, Liverpool, United Kingdom, 3 Mammalian Behaviour & Evolution Group, Institute of Integrative Biology, University of Liverpool, Leahurst Campus, Neston, United Kingdom Abstract Mouse urine contains highly polymorphic major urinary proteins that have multiple functions in scent communication through their abilities to bind, transport and release hydrophobic volatile pheromones. The mouse genome encodes for about 20 of these proteins and are classified, based on amino acid sequence similarity and tissue expression patterns, as either central or peripheral major urinary proteins. Darcin is a male specific peripheral major urinary protein and is distinctive in its role in inherent female attraction. A comparison of the structure and biophysical properties of darcin with MUP11, which belongs to the central class, highlights similarity in the overall structure between the two proteins. The thermodynamic stability, however, differs between the two proteins, with darcin being much more stable. Furthermore, the affinity of a small pheromone mimetic is higher for darcin, although darcin is more discriminatory, being unable to bind bulkier ligands. These attributes are due to the hydrophobic ligand binding cavity of darcin being smaller, caused by the presence of larger amino acid side chains. Thus, the physical and chemical characteristics of the binding cavity, together with its extreme stability, are consistent with darcin being able to exert its function after release into the environment.
    [Show full text]
  • [One Step]WARS Antibody Kit
    Leader in Biomolecular Solutions for Life Science [One Step]WARS Antibody Kit Catalog No.: RK05722 Basic Information Background Catalog No. Aminoacyl-tRNA synthetases catalyze the aminoacylation of tRNA by their cognate RK05722 amino acid. Because of their central role in linking amino acids with nucleotide triplets contained in tRNAs, aminoacyl-tRNA synthetases are thought to be among the first Applications proteins that appeared in evolution. Two forms of tryptophanyl-tRNA synthetase exist, a WB cytoplasmic form, named WARS, and a mitochondrial form, named WARS2. Tryptophanyl-tRNA synthetase (WARS) catalyzes the aminoacylation of tRNA(trp) with Cross-Reactivity tryptophan and is induced by interferon. Tryptophanyl-tRNA synthetase belongs to the Human, Mouse, Rat class I tRNA synthetase family. Four transcript variants encoding two different isoforms have been found for this gene. Observed MW 53-55kDa Calculated MW 48kDa/53kDa Category Antibody kit Product Information Component & Recommended Dilutions Source Catalog No. Product Name Dilutions Rabbit RK05722-1 WARS Rabbit pAb 1:1000 dilution Purification RK05722-2 HRP Goat Anti-Rabbit IgG (H+L) 1:10000 dilution Affinity purification Storage Store at -20℃. Avoid freeze / thaw Immunogen Information cycles. Buffer: PBS with 0.02% sodium azide, Gene ID Swiss Prot 50% glycerol, pH7.3. 7453 P23381 Avoid repeated freeze-thaw cycles. Immunogen Recombinant fusion protein containing a sequence corresponding to amino acids 1-270 Contact of human WARS (NP_776049.1). www.abclonal.com Synonyms WARS;GAMMA-2;IFI53;IFP53 Validation Data Western blot analysis of extracts of various cells, using WARS antibody (A5758) at 1:1000 dilution ratio through one-step method. Antibody | Protein | ELISA Kits | Enzyme | NGS | Service For research use only.
    [Show full text]
  • Tryptophanyl Trna Synthetase (WARS) (NM 004184) Human Tagged ORF Clone Product Data
    OriGene Technologies, Inc. 9620 Medical Center Drive, Ste 200 Rockville, MD 20850, US Phone: +1-888-267-4436 [email protected] EU: [email protected] CN: [email protected] Product datasheet for RC203587L4 Tryptophanyl tRNA synthetase (WARS) (NM_004184) Human Tagged ORF Clone Product data: Product Type: Expression Plasmids Product Name: Tryptophanyl tRNA synthetase (WARS) (NM_004184) Human Tagged ORF Clone Tag: mGFP Symbol: WARS1 Synonyms: GAMMA-2; HMN9; IFI53; IFP53; WARS Vector: pLenti-C-mGFP-P2A-Puro (PS100093) E. coli Selection: Chloramphenicol (34 ug/mL) Cell Selection: Puromycin ORF Nucleotide The ORF insert of this clone is exactly the same as(RC203587). Sequence: Restriction Sites: SgfI-MluI Cloning Scheme: ACCN: NM_004184 ORF Size: 1413 bp This product is to be used for laboratory only. Not for diagnostic or therapeutic use. View online » ©2021 OriGene Technologies, Inc., 9620 Medical Center Drive, Ste 200, Rockville, MD 20850, US 1 / 2 Tryptophanyl tRNA synthetase (WARS) (NM_004184) Human Tagged ORF Clone – RC203587L4 OTI Disclaimer: The molecular sequence of this clone aligns with the gene accession number as a point of reference only. However, individual transcript sequences of the same gene can differ through naturally occurring variations (e.g. polymorphisms), each with its own valid existence. This clone is substantially in agreement with the reference, but a complete review of all prevailing variants is recommended prior to use. More info OTI Annotation: This clone was engineered to express the complete ORF with an expression tag. Expression varies depending on the nature of the gene. RefSeq: NM_004184.3 RefSeq Size: 2884 bp RefSeq ORF: 1416 bp Locus ID: 7453 UniProt ID: P23381, A0A024R6K8 Domains: WHEP-TRS, tRNA-synt_1b Protein Families: Druggable Genome Protein Pathways: Aminoacyl-tRNA biosynthesis, Tryptophan metabolism MW: 53.2 kDa Gene Summary: Aminoacyl-tRNA synthetases catalyze the aminoacylation of tRNA by their cognate amino acid.
    [Show full text]
  • Precise Genetic Mapping and Integrative Bioinformatics in Diversity Outbred Mice Reveals Hydin As a Novel Pain Gene
    Mamm Genome (2014) 25:211–222 DOI 10.1007/s00335-014-9508-0 Precise genetic mapping and integrative bioinformatics in Diversity Outbred mice reveals Hydin as a novel pain gene Jill M. Recla • Raymond F. Robledo • Daniel M. Gatti • Carol J. Bult • Gary A. Churchill • Elissa J. Chesler Received: 14 January 2014 / Accepted: 5 March 2014 / Published online: 5 April 2014 Ó The Author(s) 2014. This article is published with open access at Springerlink.com Abstract Mouse genetics is a powerful approach for interaction. Our results reveal a novel, putative role for the discovering genes and other genome features influencing protein-coding gene, Hydin, in thermal pain response, human pain sensitivity. Genetic mapping studies have possibly through the gene’s role in ciliary motility in the historically been limited by low mapping resolution of choroid plexus–cerebrospinal fluid system of the brain. conventional mouse crosses, resulting in pain-related Real-time quantitative-PCR analysis showed no expression quantitative trait loci (QTL) spanning several megabases differences in Hydin transcript levels between pain-sensi- and containing hundreds of candidate genes. The recently tive and pain-resistant mice, suggesting that Hydin may developed Diversity Outbred (DO) population is derived influence hot-plate behavior through other biological from the same eight inbred founder strains as the Collab- mechanisms. orative Cross, including three wild-derived strains. DO mice offer increased genetic heterozygosity and allelic diversity compared to crosses involving standard mouse Introduction strains. The high rate of recombinatorial precision afforded by DO mice makes them an ideal resource for high-reso- Human pain sensitivity varies widely between individuals, lution genetic mapping, allowing the circumvention of and the significant influence of genetic factors on pain costly fine-mapping studies.
    [Show full text]
  • Bioinformatics: a Practical Guide to the Analysis of Genes and Proteins, Second Edition Andreas D
    BIOINFORMATICS A Practical Guide to the Analysis of Genes and Proteins SECOND EDITION Andreas D. Baxevanis Genome Technology Branch National Human Genome Research Institute National Institutes of Health Bethesda, Maryland USA B. F. Francis Ouellette Centre for Molecular Medicine and Therapeutics Children’s and Women’s Health Centre of British Columbia University of British Columbia Vancouver, British Columbia Canada A JOHN WILEY & SONS, INC., PUBLICATION New York • Chichester • Weinheim • Brisbane • Singapore • Toronto BIOINFORMATICS SECOND EDITION METHODS OF BIOCHEMICAL ANALYSIS Volume 43 BIOINFORMATICS A Practical Guide to the Analysis of Genes and Proteins SECOND EDITION Andreas D. Baxevanis Genome Technology Branch National Human Genome Research Institute National Institutes of Health Bethesda, Maryland USA B. F. Francis Ouellette Centre for Molecular Medicine and Therapeutics Children’s and Women’s Health Centre of British Columbia University of British Columbia Vancouver, British Columbia Canada A JOHN WILEY & SONS, INC., PUBLICATION New York • Chichester • Weinheim • Brisbane • Singapore • Toronto Designations used by companies to distinguish their products are often claimed as trademarks. In all instances where John Wiley & Sons, Inc., is aware of a claim, the product names appear in initial capital or ALL CAPITAL LETTERS. Readers, however, should contact the appropriate companies for more complete information regarding trademarks and registration. Copyright ᭧ 2001 by John Wiley & Sons, Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic or mechanical, including uploading, downloading, printing, decompiling, recording or otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copyright Act, without the prior written permission of the Publisher.
    [Show full text]
  • Multidimensional Informatic Deconvolution Defines Gender
    Mechanisms of Ageing and Development 184 (2019) 111150 Contents lists available at ScienceDirect Mechanisms of Ageing and Development journal homepage: www.elsevier.com/locate/mechagedev Multidimensional informatic deconvolution defines gender-specific roles of hypothalamic GIT2 in aging trajectories T Jaana van Gastela, Huan Caib, Wei-Na Congb, Wayne Chadwickc, Caitlin Daimonb, Hanne Leysena, Jhana O. Hendrickxa, Robin De Scheppera, Laura Vangenechtena, Jens Van Turnhouta, Jasper Verswyvela, Kevin G. Beckerd, Yongqing Zhangd, Elin Lehrmannd, William H. Wood IIId, Bronwen Martinb,e,**,1, Stuart Maudsleya,c,*,1 a Receptor Biology Lab, Department of Biomedical Sciences, University of Antwerp, 2610, Wilrijk, Belgium b Metabolism Unit, Laboratory of Clinical Investigation, National Institute on Aging, National Institutes of Health, Biomedical Research Center, 251 Bayview Boulevard, Baltimore, MD, 21224, United States c Receptor Pharmacology Unit, Laboratory of Neuroscience, National Institute on Aging, National Institutes of Health, Biomedical Research Center, 251 Bayview Boulevard, Baltimore, MD, 21224, United States d Gene Expression and Genomics Unit, Laboratory of Genetics and Genomics, National Institute on Aging, National Institutes of Health, Biomedical Research Center, 251 Bayview Boulevard, Baltimore, MD, 21224, United States e Faculty of Pharmacy, Biomedical and Veterinary Sciences, University of Antwerp, 2610, Wilrijk, Belgium ARTICLE INFO ABSTRACT Keywords: In most species, females live longer than males. An understanding of this female longevity advantage will likely GIT2 uncover novel anti-aging therapeutic targets. Here we investigated the transcriptomic responses in the hy- Longevity pothalamus – a key organ for somatic aging control – to the introduction of a simple aging-related molecular Aging perturbation, i.e. GIT2 heterozygosity. Our previous work has demonstrated that GIT2 acts as a network con- Female troller of aging.
    [Show full text]
  • Β1 Integrins Are Required for Normal CNS Myelination and Promote AKT-Dependent Myelin Outgrowth Claudia S
    RESEARCH ARTICLE 2717 Development 136, 2717-2724 (2009) doi:10.1242/dev.038679 β1 integrins are required for normal CNS myelination and promote AKT-dependent myelin outgrowth Claudia S. Barros1,*, Tom Nguyen2,*, Kathryn S. R. Spencer1, Akiko Nishiyama3, Holly Colognato2,† and Ulrich Müller1,† Oligodendrocytes in the central nervous system (CNS) produce myelin sheaths that insulate axons to ensure fast propagation of action potentials. β1 integrins regulate the myelination of peripheral nerves, but their function during the myelination of axonal tracts in the CNS is unclear. Here we show that genetically modified mice lacking β1 integrins in the CNS present a deficit in myelination but no defects in the development of the oligodendroglial lineage. Instead, in vitro data show that β1 integrins regulate the outgrowth of myelin sheaths. Oligodendrocytes derived from mutant mice are unable to efficiently extend myelin sheets and fail to activate AKT (also known as AKT1), a kinase that is crucial for axonal ensheathment. The inhibition of PTEN, a negative regulator of AKT, or the expression of a constitutively active form of AKT restores myelin outgrowth in cultured β1- deficient oligodendrocytes. Our data suggest that β1 integrins play an instructive role in CNS myelination by promoting myelin wrapping in a process that depends on AKT. KEY WORDS: β1 integrins, Myelination, Oligodendrocytes, Mouse INTRODUCTION myelination. In fact, genetic studies addressing the function of β1 In the vertebrate nervous system, myelin sheaths insulate axons integrins in oligodendrocytes have led to contradictory results. and limit membrane depolarization to the nodes of Ranvier, where Whereas oligodendrocyte-specific expression of a dominant- the machinery propagating action potentials is concentrated negative (DN) β1 integrin in a transgenic mouse model was (Sherman and Brophy, 2005).
    [Show full text]
  • Global Analysis of Trna and Translation Factor Expression Reveals a Dynamic Landscape of Translational Regulation in Human Cancers
    ARTICLE https://doi.org/10.1038/s42003-018-0239-8 OPEN Global analysis of tRNA and translation factor expression reveals a dynamic landscape of translational regulation in human cancers Zhao Zhang1, Youqiong Ye1, Jing Gong1, Hang Ruan1, Chun-Jie Liu2, Yu Xiang1, Chunyan Cai3, An-Yuan Guo2, 1234567890():,; Jiqiang Ling4, Lixia Diao5, John N. Weinstein5 & Leng Han 1,6 The protein translational system, including transfer RNAs (tRNAs) and several categories of enzymes, plays a key role in regulating cell proliferation. Translation dysregulation also contributes to cancer development, though relatively little is known about the changes that occur to the translational system in cancer. Here, we present global analyses of tRNAs and three categories of enzymes involved in translational regulation in ~10,000 cancer patients across 31 cancer types from The Cancer Genome Atlas. By analyzing the expression levels of tRNAs at the gene, codon, and amino acid levels, we identified unequal alterations in tRNA expression, likely due to the uneven distribution of tRNAs decoding different codons. We find that overexpression of tRNAs recognizing codons with a low observed-over-expected ratio may overcome the translational bottleneck in tumorigenesis. We further observed overall overexpression and amplification of tRNA modification enzymes, aminoacyl-tRNA synthe- tases, and translation factors, which may play synergistic roles with overexpression of tRNAs to activate the translational systems across multiple cancer types. 1 Department of Biochemistry and Molecular Biology, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, TX 77030, USA. 2 Department of Bioinformatics and Systems Biology, Hubei Bioinformatics and Molecular Imaging Key Laboratory, Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology Wuhan, 430074 Hubei, People’s Republic of China.
    [Show full text]
  • Coding Sequences: a History of Sequence Comparison Algorithms As a Scientiªc Instrument
    Coding Sequences: A History of Sequence Comparison Algorithms as a Scientiªc Instrument Hallam Stevens Harvard University Sequence comparison algorithms are sophisticated pieces of software that com- pare and match identical or similar regions of DNA, RNA, or protein se- quence. This paper examines the origins and development of these algorithms from the 1960s to the 1990s. By treating this software as a kind of scien- tiªc instrument used to examine sets of biological objects, the paper shows how algorithms have been used as different sorts of tools and appropriated for dif- ferent sorts of uses according to the disciplinary context in which they were deployed. These particular uses have made sequences themselves into different kinds of objects. Introduction Historians of molecular biology have paid signiªcant attention to the role of scientiªc instruments and their relationship to the production of bio- logical knowledge. For instance, Lily Kay has examined the history of electrophoresis, Boelie Elzen has analyzed the development of the ultra- centrifuge as an enabling technology for molecular biology, and Nicolas Rasmussen has examined how molecular biology was transformed by the introduction of the electron microscope (Kay 1998, 1993; Elzen 1986; Rasmussen 1997).1 Collectively, these historians have demonstrated how instruments and other elements of the material culture of the labora- tory have played a decisive role in determining the kind and quantity of knowledge that is produced by biologists. During the 1960s, a versatile new kind of instrument began to be deployed in biology: the electronic computer (Ceruzzi 2001; Lenoir 1999). Despite the signiªcant role that 1. One could also point to Robert Kohler’s (1994) work on the fruit ºy, Jean-Paul Gaudillière (2001) on laboratory mice, and Hannah Landecker (2007) on the technologies of tissue culture.
    [Show full text]
  • Renoprotective Effect of Combined Inhibition of Angiotensin-Converting Enzyme and Histone Deacetylase
    BASIC RESEARCH www.jasn.org Renoprotective Effect of Combined Inhibition of Angiotensin-Converting Enzyme and Histone Deacetylase † ‡ Yifei Zhong,* Edward Y. Chen, § Ruijie Liu,*¶ Peter Y. Chuang,* Sandeep K. Mallipattu,* ‡ ‡ † | ‡ Christopher M. Tan, § Neil R. Clark, § Yueyi Deng, Paul E. Klotman, Avi Ma’ayan, § and ‡ John Cijiang He* ¶ *Department of Medicine, Mount Sinai School of Medicine, New York, New York; †Department of Nephrology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China; ‡Department of Pharmacology and Systems Therapeutics and §Systems Biology Center New York, Mount Sinai School of Medicine, New York, New York; |Baylor College of Medicine, Houston, Texas; and ¶Renal Section, James J. Peters Veterans Affairs Medical Center, New York, New York ABSTRACT The Connectivity Map database contains microarray signatures of gene expression derived from approximately 6000 experiments that examined the effects of approximately 1300 single drugs on several human cancer cell lines. We used these data to prioritize pairs of drugs expected to reverse the changes in gene expression observed in the kidneys of a mouse model of HIV-associated nephropathy (Tg26 mice). We predicted that the combination of an angiotensin-converting enzyme (ACE) inhibitor and a histone deacetylase inhibitor would maximally reverse the disease-associated expression of genes in the kidneys of these mice. Testing the combination of these inhibitors in Tg26 mice revealed an additive renoprotective effect, as suggested by reduction of proteinuria, improvement of renal function, and attenuation of kidney injury. Furthermore, we observed the predicted treatment-associated changes in the expression of selected genes and pathway components. In summary, these data suggest that the combination of an ACE inhibitor and a histone deacetylase inhibitor could have therapeutic potential for various kidney diseases.
    [Show full text]