Glossary and Representation of Terms Related to Diagnostic Tests
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The Cross-Talk Between Methylation and Phosphorylation in Lymphoid-Specific Helicase Drives Cancer Stem-Like Properties
Signal Transduction and Targeted Therapy www.nature.com/sigtrans ARTICLE OPEN The cross-talk between methylation and phosphorylation in lymphoid-specific helicase drives cancer stem-like properties Na Liu1,2,3, Rui Yang1,2, Ying Shi1,2, Ling Chen1,2, Yating Liu1,2, Zuli Wang1,2, Shouping Liu1,2, Lianlian Ouyang4, Haiyan Wang1,2, Weiwei Lai1,2, Chao Mao1,2, Min Wang1,2, Yan Cheng5, Shuang Liu4, Xiang Wang6, Hu Zhou7, Ya Cao1,2, Desheng Xiao1 and Yongguang Tao1,2,6 Posttranslational modifications (PTMs) of proteins, including chromatin modifiers, play crucial roles in the dynamic alteration of various protein properties and functions including stem-cell properties. However, the roles of Lymphoid-specific helicase (LSH), a DNA methylation modifier, in modulating stem-like properties in cancer are still not clearly clarified. Therefore, exploring PTMs modulation of LSH activity will be of great significance to further understand the function and activity of LSH. Here, we demonstrate that LSH is capable to undergo PTMs, including methylation and phosphorylation. The arginine methyltransferase PRMT5 can methylate LSH at R309 residue, meanwhile, LSH could as well be phosphorylated by MAPK1 kinase at S503 residue. We further show that the accumulation of phosphorylation of LSH at S503 site exhibits downregulation of LSH methylation at R309 residue, which eventually promoting stem-like properties in lung cancer. Whereas, phosphorylation-deficient LSH S503A mutant promotes the accumulation of LSH methylation at R309 residue and attenuates stem-like properties, indicating the critical roles of LSH PTMs in modulating stem-like properties. Thus, our study highlights the importance of the crosstalk between LSH PTMs in determining its activity and function in lung cancer stem-cell maintenance. -
Distinct Contributions of DNA Methylation and Histone Acetylation to the Genomic Occupancy of Transcription Factors
Downloaded from genome.cshlp.org on October 8, 2021 - Published by Cold Spring Harbor Laboratory Press Research Distinct contributions of DNA methylation and histone acetylation to the genomic occupancy of transcription factors Martin Cusack,1 Hamish W. King,2 Paolo Spingardi,1 Benedikt M. Kessler,3 Robert J. Klose,2 and Skirmantas Kriaucionis1 1Ludwig Institute for Cancer Research, University of Oxford, Oxford, OX3 7DQ, United Kingdom; 2Department of Biochemistry, University of Oxford, Oxford, OX1 3QU, United Kingdom; 3Target Discovery Institute, University of Oxford, Oxford, OX3 7FZ, United Kingdom Epigenetic modifications on chromatin play important roles in regulating gene expression. Although chromatin states are often governed by multilayered structure, how individual pathways contribute to gene expression remains poorly under- stood. For example, DNA methylation is known to regulate transcription factor binding but also to recruit methyl-CpG binding proteins that affect chromatin structure through the activity of histone deacetylase complexes (HDACs). Both of these mechanisms can potentially affect gene expression, but the importance of each, and whether these activities are inte- grated to achieve appropriate gene regulation, remains largely unknown. To address this important question, we measured gene expression, chromatin accessibility, and transcription factor occupancy in wild-type or DNA methylation-deficient mouse embryonic stem cells following HDAC inhibition. We observe widespread increases in chromatin accessibility at ret- rotransposons when HDACs are inhibited, and this is magnified when cells also lack DNA methylation. A subset of these elements has elevated binding of the YY1 and GABPA transcription factors and increased expression. The pronounced ad- ditive effect of HDAC inhibition in DNA methylation–deficient cells demonstrates that DNA methylation and histone deacetylation act largely independently to suppress transcription factor binding and gene expression. -
Small Nucleolar Rnas Determine Resistance to Doxorubicin in Human Osteosarcoma
International Journal of Molecular Sciences Article Small Nucleolar RNAs Determine Resistance to Doxorubicin in Human Osteosarcoma Martina Godel 1, Deborah Morena 1, Preeta Ananthanarayanan 1, Ilaria Buondonno 1, Giulio Ferrero 2,3 , Claudia M. Hattinger 4, Federica Di Nicolantonio 1,5 , Massimo Serra 4 , 1 2 1, , 1, , Riccardo Taulli , Francesca Cordero , Chiara Riganti * y and Joanna Kopecka * y 1 Department of Oncology, University of Torino, 1026 Torino, Italy; [email protected] (M.G.); [email protected] (D.M.); [email protected] (P.A.); [email protected] (I.B.); [email protected] (F.D.N.); [email protected] (R.T.) 2 Department of Computer Science, University of Torino, 10149 Torino, Italy; [email protected] (G.F.); [email protected] (F.C.) 3 Department of Clinical and Biological Sciences, University of Torino, 10043 Orbassano, Italy 4 Laboratory of Experimental Oncology, Pharmacogenomics and Pharmacogenetics Research Unit, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy; [email protected] (C.M.H.); [email protected] (M.S.) 5 Candiolo Cancer Institute, FPO–IRCCS, 10060 Candiolo, Italy * Correspondence: [email protected] (C.R.); [email protected] (J.K.); Tel.: +39-0116705857 (C.R.); +39-0116705849 (J.K.) These authors equally contributed to this work. y Received: 31 May 2020; Accepted: 21 June 2020; Published: 24 June 2020 Abstract: Doxorubicin (Dox) is one of the most important first-line drugs used in osteosarcoma therapy. Multiple and not fully clarified mechanisms, however, determine resistance to Dox. With the aim of identifying new markers associated with Dox-resistance, we found a global up-regulation of small nucleolar RNAs (snoRNAs) in human Dox-resistant osteosarcoma cells. -
Ubiquitination/Deubiquitination and Acetylation/Deacetylation
Acta Pharmacologica Sinica (2011) 32: 139–140 npg © 2011 CPS and SIMM All rights reserved 1671-4083/11 $32.00 www.nature.com/aps Research Highlight Ubiquitination/deubiquitination and acetylation/ deacetylation: Making DNMT1 stability more coordinated Qi HONG, Zhi-ming SHAO* Acta Pharmacologica Sinica (2011) 32: 139–140; doi: 10.1038/aps.2011.3 n mammals, DNA methylation plays important role in human cancers[7, 8]. abundance of DNMT1 mutant lacking Ia crucial role in the regulation of Ubiquitinproteasome pathway is sig the HAUSP interaction domain, but not gene expression, telomere length, cell nificant in the stability of DNMT1[8], but the fulllength protein. These results differentiation, X chromosome inactiva ubiquitinmediated protein degradation show the coordination between ubiquit tion, genomic imprinting and tumori can be enhanced or attenuated by some ination of DNMT1 by UHRF1 and deu genesis[1]. DNA methylation patterns modifications like acetylation/deacety biquitination by HAUSP. Furthermore, are established de novo by DNA meth lation, protein methylation/demethyla they found that knockdown of HDAC1 yltransferases (DNMTs) 3a and 3b, tion, phosphorylation and Snitrosy increased DNMT1 acetylation, and whereas DNMT1 maintains the parent lation[9–11]. Estève et al demonstrated reduced DNMT1 abundance. Addition specific methylation from parental cells that SET7mediated lysine methy lation ally, acetyltransferase Tip60 which was to their progeny[2]. After DNA replica of DNMT1 decreased DNMT1 level found to acetylate DNMT1 promoted its tion, the new DNA strand is unmethy by ubiquitinmediated degradation[10]. ubiquitination, then destabilized it. At lated. Thus with the mother methylated Furthermore, an early study[12] showed last, Tip60 and HAUSP were found to strand, the DNA is hemimethylated. -
1519038862M28translationand
Paper No. : 15 Molecular Cell Biology Module : 28 Translation and Post-translation Modifications in Eukaryotes Development Team Principal Investigator : Prof. Neeta Sehgal Department of Zoology, University of Delhi Co-Principal Investigator : Prof. D.K. Singh Department of Zoology, University of Delhi Paper Coordinator : Prof. Kuldeep K. Sharma Department of Zoology, University of Jammu Content Writer : Dr. Renu Solanki, Deen Dayal Upadhyaya College Dr. Sudhida Gautam, Hansraj College, University of Delhi Mr. Kiran K. Salam, Hindu College, University of Delhi Content Reviewer : Prof. Rup Lal Department of Zoology, University of Delhi 1 Molecular Genetics ZOOLOGY Translation and Post-translation Modifications in Eukaryotes Description of Module Subject Name ZOOLOGY Paper Name Molecular Cell Biology; Zool 015 Module Name/Title Cell regulatory mechanisms Module Id M28: Translation and Post-translation Modifications in Eukaryotes Keywords Genome, Proteome diversity, post-translational modifications, glycosylation, phosphorylation, methylation Contents 1. Learning Objectives 2. Introduction 3. Purpose of post translational modifications 4. Post translational modifications 4.1. Phosphorylation, the addition of a phosphate group 4.2. Methylation, the addition of a methyl group 4.3. Glycosylation, the addition of sugar groups 4.4. Disulfide bonds, the formation of covalent bonds between 2 cysteine amino acids 4.5. Proteolysis/ Proteolytic Cleavage 4.6. Subunit binding to form a multisubunit protein 4.7. S-nitrosylation 4.8. Lipidation 4.9. Acetylation 4.10. Ubiquitylation 4.11. SUMOlytion 4.12. Vitamin C-Dependent Modifications 4.13. Vitamin K-Dependent Modifications 4.14. Selenoproteins 4.15. Myristoylation 5. Chaperones: Role in PTM and mechanism 6. Role of PTMs in diseases 7. Detecting and Quantifying Post-Translational Modifications 8. -
Transcriptional Regulation by Histone Ubiquitination and Deubiquitination
Downloaded from genesdev.cshlp.org on September 30, 2021 - Published by Cold Spring Harbor Laboratory Press PERSPECTIVE Transcriptional regulation by histone ubiquitination and deubiquitination Yi Zhang1 Department of Biochemistry and Biophysics, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, North Carolina 27599, USA Ubiquitin (Ub) is a 76-amino acid protein that is ubiqui- The fact that histone ubiquitination occurs in the largely tously distributed and highly conserved throughout eu- monoubiquitinated form and is not linked to degrada- karyotic organisms. Whereas the extreme C-terminal tion, in combination with the lack of information regard- four amino acids are in a random coil, its N-terminal 72 ing the responsible enzymes, prevented us from under- amino acids have a tightly folded globular structure (Vi- standing the functional significance of this modification. jay-Kumar et al. 1987; Fig. 1A). Since its discovery ∼28 Recent identification of the E2 and E3 proteins involved years ago (Goldknopf et al. 1975), a variety of cellular in H2B ubiquitination (Robzyk et al. 2000; Hwang et al. processes including protein degradation, stress response, 2003; Wood et al. 2003a) and the discovery of cross-talk cell-cycle regulation, protein trafficking, endocytosis sig- between histone methylation and ubiquitination (Dover naling, and transcriptional regulation have been linked et al. 2002; Sun and Allis 2002) have set the stage for to this molecule (Pickart 2001). Ubiquitylation is pro- functional analysis of histone ubiquitination. In a timely posed to serve as a signaling module, and the informa- paper published in the previous issue of Genes & Devel- tion transmitted by this tag may depend on the nature of opment, Shelley Berger and colleagues (Henry et al. -
Bacteriophage T7 DNA Polymerase – Sequenase
Bacteriophage T7 DNA polymerase – sequenase The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters Citation Zhu, Bin. 2014. “Bacteriophage T7 DNA polymerase – sequenase.” Frontiers in Microbiology 5 (1): 181. doi:10.3389/fmicb.2014.00181. http://dx.doi.org/10.3389/fmicb.2014.00181. Published Version doi:10.3389/fmicb.2014.00181 Citable link http://nrs.harvard.edu/urn-3:HUL.InstRepos:12407012 Terms of Use This article was downloaded from Harvard University’s DASH repository, and is made available under the terms and conditions applicable to Other Posted Material, as set forth at http:// nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of- use#LAA REVIEW ARTICLE published: 16 April 2014 doi: 10.3389/fmicb.2014.00181 BacteriophageT7 DNA polymerase – sequenase Bin Zhu* Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA Edited by: An ideal DNA polymerase for chain-terminating DNA sequencing should possess the Andrew F.Gardner, New England following features: (1) incorporate dideoxy- and other modified nucleotides at an efficiency Biolabs, USA similar to that of the cognate deoxynucleotides; (2) high processivity; (3) high fidelity in Reviewed by: the absence of proofreading/exonuclease activity; and (4) production of clear and uniform Kirk Matthew Schnorr, Novozymes A/S, Denmark signals for detection. The DNA polymerase encoded by bacteriophage T7 is naturally Samir Hamdan, King Abdullah endowed with or can be engineered to have all these characteristics. The chemically or University of Science and Technology, genetically modified enzyme (Sequenase) expedited significantly the development of DNA Saudi Arabia sequencing technology. -
Sequencing.Pdf
Sequencing. Biological sciences has a long and storied history of natural science – identifying, cataloging, and classifying organisms in different environments. Every aspect of biological sciences is being revolutionized by two dominant technologies: cheap and ubiquitous access to DNA sequencing, and cheap and ubiquitous access to high performance computing. Molecular biology was forever altered by the introduction of the polymerase chain reaction (PCR), and that invention, more than any other, has enabled the sequencing revolution. Taxonomy, one of the oldest endeavors of the biologist, is changing from char- acterizing organisms based on morphology to characterizing organisms based on DNA sequences. Revisionist taxonomic approaches are being introduced throughout the tree of life, and no branch on the tree can avoid the sequenc- ing machine. For example, microbial and viral taxonomy are being completely rewritten because of the analysis of DNA sequences (Rohwer & Edwards, 2002; Thompson et al., 2015). All aspects of ecology are being affected by the intro- duction of DNA sequencing: for example, in the marine environment the ecology of everything from the largest (Cammen et al., 2016) to the smallest (Chow & Suttle, 2015; Haggerty & Dinsdale, 2017) organisms is being revised because of sequence analysis. Evolutionary theories about plants and animals are being upended because of the introduction of genome skimming techniques and deep sequencing (Hollingsworth et al., 2016). Sanger Sequencing Two-time nobel Laureate Dr. Fred Sanger developed this sequencing technol- ogy in 1977. The approach uses terminators, dideoxynucleotide triphosphates (ddNTPs), that terminate DNA extension during replication and do not allow the strand to be synthesized further. Thus, every time a ddNTP is added to the growing DNA strand, synthesis stops and the fragement can not be made any longer. -
Sanger Sequencing – a Hands-On Simulation Background And
Sanger sequencing – a hands-on simulation Background and Guidelines for Instructor Jared Young Correspondence concerning this article should be addressed to Jared Young, Mills College 5000 MacArthur Blvd, Oakland, CA 94613 Contact: [email protected] Synopsis This hands-on simulation teaches the Sanger (dideoxy) method of DNA sequencing. In the process of carrying out the exercise, students also confront DNA synthesis, especially as it relates to chemical structure, and the stochastic nature of biological processes. The exercise is designed for an introductory undergraduate genetics course for biology majors. The exercise can be completed in around 90-minutes, which can be broken up into a 50-minute period for the simulation and a follow-up 50-minute (or less) period for discussion. This follow-up could also take place in a Teaching Assistant (TA) led section. The exercise involves interactions between student pairs and the entire class. There is an accompanying student handout with prompts that should be invoked where indicated in these instructions. Introduction Sanger sequencing is an important technique: it revolutionized the field of Genetics and is still in wide use today. Sanger sequencing is a powerful pedagogical tool well-suited for inducing multiple “aha” moments: in achieving a deep understanding of the technique, students gain a better understanding of DNA and nucleotide structure, DNA synthesis, the stochastic nature of biological processes, the utility of visible chemical modifications (in this case, fluorescent dyes), gel electrophoresis, and the connection between a physical molecule and the information it contains. Sanger sequencing is beautiful: a truly elegant method that can bring a deep sense of satisfaction when it is fully understood. -
DNA Sequencing
DNA Sequencing: Sanger Method (Dideoxynucleotide chain termination) Sanger sequencing is a DNA sequencing method in which target DNA is denatured and annealed to an oligonucleotide primer, which is then extended by DNA polymerase using a mixture of deoxynucleotide triphosphates (normal dNTPs) and chain-terminating dideoxynucleotide triphosphates (ddNTPs). ddNTPs lack the 3’ OH group to which the next dNTP of the growing DNA chain is added. Without the 3’ OH, no more nucleotides can be added, and DNA polymerase falls off. The resulting newly synthesized DNA chains will be a mixture of lengths, depending on how long the chain was when a ddNTP was randomly incorporated. Manual DNA sequencing example: • First, anneal the primer to the DNA template (must be single stranded): 5’ -GAATGTCCTTTCTCTAAG 3'-GGAGACTTACAGGAAAGAGATTCAGGATTCAGGAGGCCTACCATGAAGATCAAG-5' • Then split the sample into four aliquots including the following nucleotides: "G" tube: All four dNTPs, one of which is radiolabeled, plus ddGTP (low concentration) "A" tube: All four dNTPs, one of which is radiolabeled, plus ddATP "T" tube: All four dNTPs, one of which is radiolabeled, plus ddTTP "C" tube: All four dNTPs, one of which is radiolabeled, plus ddCTP • When a DNA polymerase (e.g. Klenow fragment) is added to the tubes, the synthetic reaction proceeds until, by chance, a dideoxynucleotide is incorporated instead of a deoxynucleotide. This is a "chain termination" event, because there is a 3' H instead of a 3' OH group. Since the synthesized DNA is labeled (classically with 35S-dATP), the products can be detected and distinguished from the template. Note that the higher the concentration of the ddNTP in the reaction, the shorter the products will be, hence, you will get sequence CLOSER to your primer. -
Sanger Sequencing 14
Molecular Biology and History of DNA Sequencing 02-223 Sept. 9 2014 History of DNA Thomas Morgan first James Watson and described Francis Crick proposed Gregor Mendel first linkage and that DNA is a double described patterns of recombination strand with a double inheritance helical structure 1866 1869 1911 1950 1953 Fredrich Edwin Chargaff Miescher first discovered that A and isolated DNA T, and G and C have equal amounts http://www.nature.com/scitable/content/dna-is-a-double-helix-24263 History of DNA Frederick Sanger Arthur Kornberg Hamilton Smith developed dideoxy replicated DNA in- discovered DNA Commercial DNA sequencing ~100 vitro using DNA restriction automated DNA bases/reaction polymerase enzymes synthesizer PCR developed ~1000 bases/ by Kary Mullis reaction 1957 1961 1970 1971 1977 1983 1986 1996 First genome sequenced using Leroy Hood Marshall in-vitro replication by Ray Wu, developed Nirenberg A.D. Kaiser, and Ellen Taylor . automated elucidated the Phage λ, ~5000 nt took over 3 sequencing codons years DNA Polymerase h"p://www.virology.ws/2009/05/10/the-error-prone-ways-of-rna-synthesis/ Even with proofreading, mistakes made every 107-109 Bases 6 Billion Bases in human genome! h"p://www.virology.ws/2009/05/10/the-error-prone-ways-of-rna-synthesis/ Molecular Biology of the Cell. 4th edition. Alberts B, Johnson A, Lewis J, et al. New York: Garland Science; 2002. PCR • Polymerase Chain ReacJon • Invented in 1983 • DNA polymerase from Thermus aqua+cus • 2.2x105 error rate Polymerase Chain Reaction (PCR) overview buffer, ssDNA primers, -
A Beginner's Guide to Next Generation Sequencing
A BEGINNER’S GUIDE TO NEXT GENERATION SEQUENCING youseq.com Next Generation Sequencing Let’s keep things simple. The world of Next Generation Sequencing (NGS) can seem complex and intimidating. It need not be. Let’s start by reminding ourselves what its useful for and why we use it. All of life is coded in it’s DNA. A remarkably simple code of four molecules that act as a blue print to define the proteins that we and all of the organisms we share our planet with are made of. Reading this code is one of the most astonishing achievements that the human species has ever and will ever accomplish. Reading this code helps us to understand how we are made, how we are all related, how errors or mutations in our DNA cause disease and how we may respond best to medicines. It holds the promise to revolutionise healthcare and has already begun to do so. The first human genome “read” was competed in 2001. It took 10 years and the best part of $2.7bn. It was achieved by DNA sequencing. A method by which the sequence of the DNA is read painstakingly in small fragments and then reassembled to create a complete sequence. Sanger Sequencing as it is known, was the method used to achieve the first publication of the first human genome. Next Generation Sequencing is a phrase used to describe a range of technologies that speed up and reduce the cost of DNA sequencing vs the traditional Sanger sequencing. What are all these different Next Generation Sequencing Technologies? Well there are quite a few of them.