Interactions of Mutant and Wild-Type Flap Endonucleases with Oligonucleotide Substrates Suggest an Alternative Model of DNA Binding
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METACYC ID Description A0AR23 GO:0004842 (Ubiquitin-Protein Ligase
Electronic Supplementary Material (ESI) for Integrative Biology This journal is © The Royal Society of Chemistry 2012 Heat Stress Responsive Zostera marina Genes, Southern Population (α=0. -
Crystal Structure of the Targeting Endonuclease of the Human LINE-1 Retrotransposon
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Elsevier - Publisher Connector Structure, Vol. 12, 975–986, June, 2004, 2004 Elsevier Ltd. All rights reserved. DOI 10.1016/j.str.2004.04.011 Crystal Structure of the Targeting Endonuclease of the Human LINE-1 Retrotransposon Oliver Weichenrieder,1,* Kostas Repanas,1 transcriptase. Depending on the DNA integration mech- and Anastassis Perrakis* anism, two classes of retrotransposons are distin- The Netherlands Cancer Institute guished. The first class contains long terminal repeat Department of Molecular Carcinogenesis-H2 (LTR) retrotransposons and retroviruses. These retroele- Plesmanlaan 121 ments use an integrase that recognizes the LTRs of the 1066 CX Amsterdam double-stranded DNA copy. The second, much larger, The Netherlands and more ancient class includes all non-LTR retro- transposons. Those are thought to integrate via target- primed reverse transcription (TPRT), a process in which Summary reverse transcription and integration are coupled (Eick- bush and Malik, 2002; Kazazian, 2004). An endonuclease The human L1 endonuclease (L1-EN) is encoded by that is part of the same polypeptide chain as the reverse the non-LTR retrotransposon LINE-1 (L1). L1 is re- transcriptase nicks the genomic DNA and hands over sponsible for more than 1.5 million retrotransposition the resulting ribose 3Ј-hydroxyl end as a primer for re- events in the history of the human genome, contribut- verse transcription of associated template RNA (Cost ing more than a quarter to human genomic DNA (L1 et al., 2002; Luan et al., 1993). and Alu elements). L1-EN is related to the well-under- Most non-LTR retrotransposons encode an endonu- stood human DNA repair endonuclease APE1, and its clease located N-terminally of the reverse transcriptase. -
Restriction Endonucleases
Molecular Biology Problem Solver: A Laboratory Guide. Edited by Alan S. Gerstein Copyright © 2001 by Wiley-Liss, Inc. ISBNs: 0-471-37972-7 (Paper); 0-471-22390-5 (Electronic) 9 Restriction Endonucleases Derek Robinson, Paul R. Walsh, and Joseph A. Bonventre Background Information . 226 Which Restriction Enzymes Are Commercially Available? . 226 Why Are Some Enzymes More Expensive Than Others? . 227 What Can You Do to Reduce the Cost of Working with Restriction Enzymes? . 228 If You Could Select among Several Restriction Enzymes for Your Application, What Criteria Should You Consider to Make the Most Appropriate Choice? . 229 What Are the General Properties of Restriction Endonucleases? . 232 What Insight Is Provided by a Restriction Enzyme’s Quality Control Data? . 233 How Stable Are Restriction Enzymes? . 236 How Stable Are Diluted Restriction Enzymes? . 236 Simple Digests . 236 How Should You Set up a Simple Restriction Digest? . 236 Is It Wise to Modify the Suggested Reaction Conditions? . 237 Complex Restriction Digestions . 239 How Can a Substrate Affect the Restriction Digest? . 239 Should You Alter the Reaction Volume and DNA Concentration? . 241 Double Digests: Simultaneous or Sequential? . 242 225 Genomic Digests . 244 When Preparing Genomic DNA for Southern Blotting, How Can You Determine If Complete Digestion Has Been Obtained? . 244 What Are Your Options If You Must Create Additional Rare or Unique Restriction Sites? . 247 Troubleshooting . 255 What Can Cause a Simple Restriction Digest to Fail? . 255 The Volume of Enzyme in the Vial Appears Very Low. Did Leakage Occur during Shipment? . 259 The Enzyme Shipment Sat on the Shipping Dock for Two Days. -
Large XPF-Dependent Deletions Following Misrepair of a DNA Double Strand Break Are Prevented by the RNA:DNA Helicase Senataxin
www.nature.com/scientificreports OPEN Large XPF-dependent deletions following misrepair of a DNA double strand break are prevented Received: 26 October 2017 Accepted: 9 February 2018 by the RNA:DNA helicase Published: xx xx xxxx Senataxin Julien Brustel1, Zuzanna Kozik1, Natalia Gromak2, Velibor Savic3,4 & Steve M. M. Sweet1,5 Deletions and chromosome re-arrangements are common features of cancer cells. We have established a new two-component system reporting on epigenetic silencing or deletion of an actively transcribed gene adjacent to a double-strand break (DSB). Unexpectedly, we fnd that a targeted DSB results in a minority (<10%) misrepair event of kilobase deletions encompassing the DSB site and transcribed gene. Deletions are reduced upon RNaseH1 over-expression and increased after knockdown of the DNA:RNA helicase Senataxin, implicating a role for DNA:RNA hybrids. We further demonstrate that the majority of these large deletions are dependent on the 3′ fap endonuclease XPF. DNA:RNA hybrids were detected by DNA:RNA immunoprecipitation in our system after DSB generation. These hybrids were reduced by RNaseH1 over-expression and increased by Senataxin knock-down, consistent with a role in deletions. Overall, these data are consistent with DNA:RNA hybrid generation at the site of a DSB, mis-processing of which results in genome instability in the form of large deletions. DNA is the target of numerous genotoxic attacks that result in diferent types of damage. DNA double-strand breaks (DSBs) occur at low frequency, compared with single-strand breaks and other forms of DNA damage1, however DSBs pose the risk of translocations and deletions and their repair is therefore essential to cell integrity. -
Phosphate Steering by Flap Endonuclease 1 Promotes 50-flap Specificity and Incision to Prevent Genome Instability
ARTICLE Received 18 Jan 2017 | Accepted 5 May 2017 | Published 27 Jun 2017 DOI: 10.1038/ncomms15855 OPEN Phosphate steering by Flap Endonuclease 1 promotes 50-flap specificity and incision to prevent genome instability Susan E. Tsutakawa1,*, Mark J. Thompson2,*, Andrew S. Arvai3,*, Alexander J. Neil4,*, Steven J. Shaw2, Sana I. Algasaier2, Jane C. Kim4, L. David Finger2, Emma Jardine2, Victoria J.B. Gotham2, Altaf H. Sarker5, Mai Z. Her1, Fahad Rashid6, Samir M. Hamdan6, Sergei M. Mirkin4, Jane A. Grasby2 & John A. Tainer1,7 DNA replication and repair enzyme Flap Endonuclease 1 (FEN1) is vital for genome integrity, and FEN1 mutations arise in multiple cancers. FEN1 precisely cleaves single-stranded (ss) 50-flaps one nucleotide into duplex (ds) DNA. Yet, how FEN1 selects for but does not incise the ss 50-flap was enigmatic. Here we combine crystallographic, biochemical and genetic analyses to show that two dsDNA binding sites set the 50polarity and to reveal unexpected control of the DNA phosphodiester backbone by electrostatic interactions. Via ‘phosphate steering’, basic residues energetically steer an inverted ss 50-flap through a gateway over FEN1’s active site and shift dsDNA for catalysis. Mutations of these residues cause an 18,000-fold reduction in catalytic rate in vitro and large-scale trinucleotide (GAA)n repeat expansions in vivo, implying failed phosphate-steering promotes an unanticipated lagging-strand template-switch mechanism during replication. Thus, phosphate steering is an unappreciated FEN1 function that enforces 50-flap specificity and catalysis, preventing genomic instability. 1 Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. -
Redundancy in Ribonucleotide Excision Repair: Competition, Compensation, and Cooperation
DNA Repair 29 (2015) 74–82 Contents lists available at ScienceDirect DNA Repair j ournal homepage: www.elsevier.com/locate/dnarepair Redundancy in ribonucleotide excision repair: Competition, compensation, and cooperation ∗ Alexandra Vaisman, Roger Woodgate Laboratory of Genomic Integrity, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892-3371, USA a r t i c l e i n f o a b s t r a c t Article history: The survival of all living organisms is determined by their ability to reproduce, which in turn depends Received 1 November 2014 on accurate duplication of chromosomal DNA. In order to ensure the integrity of genome duplication, Received in revised form 7 February 2015 DNA polymerases are equipped with stringent mechanisms by which they select and insert correctly Accepted 9 February 2015 paired nucleotides with a deoxyribose sugar ring. However, this process is never 100% accurate. To fix Available online 16 February 2015 occasional mistakes, cells have evolved highly sophisticated and often redundant mechanisms. A good example is mismatch repair (MMR), which corrects the majority of mispaired bases and which has been Keywords: extensively studied for many years. On the contrary, pathways leading to the replacement of nucleotides Ribonucleotide excision repair with an incorrect sugar that is embedded in chromosomal DNA have only recently attracted significant Nucleotide excision repair attention. This review describes progress made during the last few years in understanding such path- Mismatch repair Ribonuclease H ways in both prokaryotes and eukaryotes. Genetic studies in Escherichia coli and Saccharomyces cerevisiae Flap endonuclease demonstrated that MMR has the capacity to replace errant ribonucleotides, but only when the base is DNA polymerase I mispaired. -
S1 Nuclease Degrades Single-Stranded Nucleic Acids, Releasing 5'-Phosphoryl Mono- Or Oligonucleotides
Description S1 Nuclease degrades single-stranded nucleic acids, releasing 5'-phosphoryl mono- or oligonucleotides. It is five times more active on DNA than on RNA (1). S1 Nuclease also cleaves dsDNA at the single-stranded region caused by a nick, gap, mismatch or loop. PRODUCT INFORMATION S1 Nuclease exhibits 3’-phosphomonoesterase activity. S1 Nuclease The enzyme is a glycoprotein with a carbohydrate content of 18%. Pub. No. MAN0013722 Applications Rev. Date 29 November 2016 (Rev. A.00) Removal of single-stranded overhangs of DNA #_ fragments (2). S1 transcript mapping (3, 4). Lot: _ Expiry Date: _ Cleavage of hairpin loops. Creation of unidirectional deletions in DNA fragments in Store at -20 °C conjunction with Exo III (5). Source Aspergillus oryzae cells. Components #EN0321 100 U/µL S1 Nuclease 10000 U 5X Reaction Buffer 2 1 mL www.thermofisher.com For Research Use Only. Not for use in diagnostic procedures. Definition of Activity Unit CERTIFICATE OF ANALYSIS One unit of the enzyme produces 1 µg of acid soluble S1 Nuclease was tested for the absence of deoxyribonucleotides in 1 min at 37 °C. contaminating double-stranded DNA specific nuclease Enzyme activity is assayed in the following mixture: activity. 30 mM sodium-acetate (pH 4.5), 50 mM NaCl, 0.1 mM ZnCl2, 5% (v/v) glycerol, 800 µg/mL heat Quality authorized by: Jurgita Zilinskiene denatured calf thymus DNA. Storage Buffer The enzyme is supplied in: 20 mM Tris-HCl (pH 7.5), 50 mM NaCl, 0.1 mM ZnCl2 and 50% (v/v) glycerol. 5X Reaction Buffer 200 mM sodium acetate (pH 4.5 at 25 °C), 1.5 M NaCl and 10 mM ZnSO4. -
Regulation of Yeast DNA Polymerase -Mediated Strand Displacement
Nucleic Acids Research Advance Access published March 26, 2015 Nucleic Acids Research, 2015 1 doi: 10.1093/nar/gkv260 Regulation of yeast DNA polymerase ␦-mediated strand displacement synthesis by 5-flaps Katrina N. Koc, Joseph L. Stodola, Peter M. Burgers and Roberto Galletto* Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, Saint Louis, MO 63110, USA Received December 22, 2014; Revised March 13, 2015; Accepted March 16, 2015 Downloaded from ABSTRACT ing the template strand (4,5). Finally, during Okazaki frag- ment maturation Pol ␦ catalyzes strand displacement DNA The strand displacement activity of DNA polymerase synthesis through the downstream Okazaki fragment to al- ␦ is strongly stimulated by its interaction with pro- low for the generation of 5 -flaps that are substrates for the liferating cell nuclear antigen (PCNA). However, in- FEN1 endonuclease (1–3,6,7). Strand displacement by Pol http://nar.oxfordjournals.org/ activation of the 3 –5 exonuclease activity is suffi- ␦ and FEN1 cleavage activity must be a highly coordinated cient to allow the polymerase to carry out strand dis- process to generate ligatable nicks that are then the sub- placement even in the absence of PCNA. We have strate of DNA ligase I (nick translation) (8). In this process examined in vitro the basic biochemical properties the amount of strand displacement activity needs to be reg- that allow Pol ␦-exo− to carry out strand displace- ulated to avoid generating 5 -flaps that are long enough to ment synthesis and discovered that it is regulated by bind Replication Protein A (RPA), as RPA binding is in- the 5-flaps in the DNA strand to be displaced. -
FAN1 Nuclease Activity Affects CAG Expansion and Age at Onset of Huntington's Disease
bioRxiv preprint doi: https://doi.org/10.1101/2021.04.13.439716; this version posted April 14, 2021. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. McAllister, Donaldson et al FAN1 nuclease activity affects CAG expansion and age at onset of Huntington's disease Branduff McAllister, PhD1+, Jasmine Donaldson, PhD1+, Caroline S. Binda, PhD1, Sophie Powell, BSc1, Uroosa Chughtai, BSc1, Gareth Edwards, PhD1, Joseph Stone, BA1, Sergey Lobanov, PhD1, Linda Elliston, MPhil1, Laura-Nadine Schuhmacher, PhD1, Elliott Rees, PhD1, Georgina Menzies, PhD2, Marc Ciosi, PhD3, Alastair Maxwell, PhD3, Michael J. Chao, PhD4, Eun Pyo Hong, PhD4, Diane Lucente, MS4, Vanessa Wheeler, PhD4, Jong-Min Lee, PhD4,5, Marcy E. MacDonald, PhD4,5, Jeffrey D. Long, PhD6, Elizabeth H. Aylward, PhD7, G. Bernhard Landwehrmeyer, MD PhD8, Anne E. Rosser, MB BChir, PhD9,10, REGISTRY Investigators of the European Huntington’s disease network11, Jane S. Paulsen, PhD12, PREDICT-HD Investigators of the Huntington Study Group13, Nigel M. Williams, PhD1, James F. Gusella, PhD4,5, Darren G. Monckton, PhD3, Nicholas D. Allen, PhD2, Peter Holmans, PhD1, Lesley Jones, PhD1,14* & Thomas H. Massey, BM BCh, DPhil1,15* 1 Division of Psychological Medicine and Clinical Neurosciences, Cardiff University, Cardiff, CF24 4HQ, United Kingdom 2 School of Biosciences, Cardiff University, Cardiff, CF10 3AX, -
Mycobacterium Smegmatis Fena Highlight Active Site
4164–4175 Nucleic Acids Research, 2018, Vol. 46, No. 8 Published online 9 April 2018 doi: 10.1093/nar/gky238 Crystal structure and mutational analysis of Mycobacterium smegmatis FenA highlight active site amino acids and three metal ions essential for flap endonuclease and 5 exonuclease activities Maria Loressa Uson1,AyalaCarl1, Yehuda Goldgur2 and Stewart Shuman1,* 1Molecular Biology Program, Sloan-Kettering Institute, New York, NY 10065, USA and 2Structural Biology Program, Sloan-Kettering Institute, New York, NY 10065, USA Received January 17, 2018; Revised March 19, 2018; Editorial Decision March 20, 2018; Accepted March 21, 2018 ABSTRACT exonuclease domains of bacterial DNA polymerase I (3– 7); (ii) free-standing bacterial FEN enzymes such as Es- Mycobacterium smegmatis FenA is a nucleic acid cherichia coli ExoIX, Bacillus subtilis YpcP and Mycobac- phosphodiesterase with flap endonuclease and 5 terium smegmatis FenA (7–9); (iii) bacteriophage enzymes exonuclease activities. The 1.8 A˚ crystal structure T5 Fen (10,11) and T4 Fen/RNaseH (12,13); (iv) eukaryal of FenA reported here highlights as its closest ho- FEN1 (14–16); and (v) archaeal FENs (17–19). Human mologs bacterial FEN-family enzymes ExoIX, the Pol1 ExoI is an exemplar of the FEN-like clade (20). Other mem- exonuclease domain and phage T5 Fen. Mycobac- bers of the FEN/FEN-like family include the nucleotide terial FenA assimilates three active site manganese excision repair nuclease Rad2 (21) and the Holliday junc- ions (M1, M2, M3) that are coordinated, directly and tion resolvase GEN1 (22,23). The FEN/FEN-like family via waters, to a constellation of eight carboxylate side are metal-dependent phosphodiesterases. -
Structure and Function of Nucleases in DNA Repair: Shape, Grip and Blade of the DNA Scissors
Oncogene (2002) 21, 9022 – 9032 ª 2002 Nature Publishing Group All rights reserved 0950 – 9232/02 $25.00 www.nature.com/onc Structure and function of nucleases in DNA repair: shape, grip and blade of the DNA scissors Tatsuya Nishino1 and Kosuke Morikawa*,1 1Department of Structural Biology, Biomolecular Engineering Research Institute (BERI), 6-2-3 Furuedai, Suita, Osaka 565-0874, Japan DNA nucleases catalyze the cleavage of phosphodiester mismatched nucleotides. They also recognize the bonds. These enzymes play crucial roles in various DNA replication or recombination intermediates to facilitate repair processes, which involve DNA replication, base the following reaction steps through the cleavage of excision repair, nucleotide excision repair, mismatch DNA strands (Table 1). repair, and double strand break repair. In recent years, Nucleases can be regarded as molecular scissors, new nucleases involved in various DNA repair processes which cleave phosphodiester bonds between the sugars have been reported, including the Mus81 : Mms4 (Eme1) and the phosphate moieties of DNA. They contain complex, which functions during the meiotic phase and conserved minimal motifs, which usually consist of the Artemis : DNA-PK complex, which processes a V(D)J acidic and basic residues forming the active site. recombination intermediate. Defects of these nucleases These active site residues coordinate catalytically cause genetic instability or severe immunodeficiency. essential divalent cations, such as magnesium, Thus, structural biology on various nuclease actions is calcium, manganese or zinc, as a cofactor. However, essential for the elucidation of the molecular mechanism the requirements for actual cleavage, such as the types of complex DNA repair machinery. Three-dimensional and the numbers of metals, are very complicated, but structural information of nucleases is also rapidly are not common among the nucleases. -
Supplementary Materials
Supplementary Materials COMPARATIVE ANALYSIS OF THE TRANSCRIPTOME, PROTEOME AND miRNA PROFILE OF KUPFFER CELLS AND MONOCYTES Andrey Elchaninov1,3*, Anastasiya Lokhonina1,3, Maria Nikitina2, Polina Vishnyakova1,3, Andrey Makarov1, Irina Arutyunyan1, Anastasiya Poltavets1, Evgeniya Kananykhina2, Sergey Kovalchuk4, Evgeny Karpulevich5,6, Galina Bolshakova2, Gennady Sukhikh1, Timur Fatkhudinov2,3 1 Laboratory of Regenerative Medicine, National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, Moscow, Russia 2 Laboratory of Growth and Development, Scientific Research Institute of Human Morphology, Moscow, Russia 3 Histology Department, Medical Institute, Peoples' Friendship University of Russia, Moscow, Russia 4 Laboratory of Bioinformatic methods for Combinatorial Chemistry and Biology, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Moscow, Russia 5 Information Systems Department, Ivannikov Institute for System Programming of the Russian Academy of Sciences, Moscow, Russia 6 Genome Engineering Laboratory, Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region, Russia Figure S1. Flow cytometry analysis of unsorted blood sample. Representative forward, side scattering and histogram are shown. The proportions of negative cells were determined in relation to the isotype controls. The percentages of positive cells are indicated. The blue curve corresponds to the isotype control. Figure S2. Flow cytometry analysis of unsorted liver stromal cells. Representative forward, side scattering and histogram are shown. The proportions of negative cells were determined in relation to the isotype controls. The percentages of positive cells are indicated. The blue curve corresponds to the isotype control. Figure S3. MiRNAs expression analysis in monocytes and Kupffer cells. Full-length of heatmaps are presented.