The Cloning Guide the First Step Towards a Succesful Igem Project Igem Bonn NRP-UEA Igem
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Molecular Cloning of DNA Fragments Produced by Restriction
Proc. Natl. Acad. Sci. USA Vol. 73, No. 5, pp. 1537-1541, May 1976 Biochemistry Molecular cloning of DNA fragments produced by restriction endonucleases SailI and BamI (DNA joining/plasmid/insertional inactivation of genes/Drosophila melanogaster) DEAN H. HAMER AND CHARLES A. THOMAS, JR. Department of Biological Chemistry, Harvard Medical School, Boston, Massachusetts 02115 Communicated by Bernard D. Dats, February 25,1976 ABSTRACT The highly specific restriction endonucleases cleaves various DNAs about once every 8 kb (kilobases), as SalI and BamI produce DNA fragments with complementary, compared to about once every 4 kb for EcoRI (16, 18). The cohesive termini that can be covalently joined by DNA ligase. resulting fragments have cohesive termini, and can be joined The Escherichia coli kanamycin resistance factor pML21 has to one another in head-to-tail, head-to-head, and one Sall site, at which DNA can be inserted without interfering probably with the expression of drug resistance or replication of the tail-to-tail orientation. Another highly specific restriction en- plasmid. A more convenient cloning vehicle can be made with donuclease that produces cohesive termini is BamI, from Ba- the tetracycline resistance factor pSC101, since insertion of cillus amyloliqefaciens H (G. Wilson and F. Young, personal DNA either at its single site for Sall or at that for BamI inacti- communication). We have shown that it cleaves D. melano- vates plasmid-specified drug resistance but not replication. To gaster DNA about once every 6 kb. This report describes the take advantage of this insertional inactivation, pSC101 was construction and verification of plasmid vehicles that allow one joined to a ColEl-ampicillin resistance plasmid having no Sall site, and to a ColEl-kanamycin resistance plasmid having no to clone and amplify potentially any DNA fragment produced BamI site. -
Genetic Analysis of SARS-Cov-2 and the Common Golden Nucleotides to Human Gene
Genetic analysis of SARS-CoV-2 and the common golden nucleotides to human gene Hamed Babaee ( [email protected] ) Payame Noor University https://orcid.org/0000-0001-7093-6400 Research Article Keywords: Coronavirus, COVID-19, SARS-CoV-2, RNA sequencing, Human genome Posted Date: August 30th, 2021 DOI: https://doi.org/10.21203/rs.3.rs-854956/v1 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Page 1/11 Abstract Background The coronavirus disease pandemic began in 2019 in Wuhan, China, and continues into 2021, as new mutant viruses appear and require new solutions and treatments. Methods and Results In this study, by genetic analysis of data from 24 SARS-CoV-2 samples from different countries and their alignment with each other and the Wuhan reference virus as well as the human genome, the disease factor is looked at from another angle. The result is the identication of genetic differences in viruses, and the nding of a unique 17-nucleotide sequence between human genes, viruses, and enzymes that can contribute to the onset and progression of the disease. Conclusions The role of this sequence in DNA replication and the production of new proteins and its alignment with the EPPK1 gene that may cause disease and its various symptoms are likely. Introduction In 2019, the world was again struck by a new viral contagious disease called COVID-19 or Coronavirus disease. Apparently, this disease originated from a seafood wholesale market in Wuhan, China from an unknown animal source. In the beginning, China had the highest case report and mortality rates which were mitigated by severe quarantine measures. -
How to Clone Ref V1-2
A primer on cloning in E. coli Michael Nonet Department of Neuroscience Washington University Medical School St Louis, MO 63110 Draft 1.2.1 Nov. 10, 2019 Things to add: gel electrophoresis methods basic bacteriology methods Index Overview E. coli vectors! 6 Types of E. coli vectors! 6 Components of typical plasmid vectors! 6 Origin of replication! 6 Antibiotic resistance genes! 7 Master Cloning Sites! 7 LacZ"! 7 ccdB ! 8 Design of DNA constructs! 9 Choice of vector! 9 Source of insert! 9 Plasmids! 9 Genomic or cDNA! 9 Synthetic DNA! 10 Overview of different approaches to creating clones! 10 Restriction enzyme based cloning! 10 Single vs. double cut method! 11 Blunt vs “sticky” restriction sites! 11 Typical methodology for restriction enzyme cloning! 11 Golden Gate style cloning! 12 Typical methodology for Golden Gate cloning! 12 Gateway cloning! 13 Typical methodology for Gateway cloning! 14 Gibson assembly cloning! 15 Typical procedure for Gibson assembly! 15 Site directed mutagenesis! 16 PCR overlap approach! 16 DpnI mediated site directed mutagenesis! 16 Typical procedure for site directed mutagenesis! 17 Detailed methodology for all five methods Restriction enzyme cloning! 18 Designing the cloning strategy ! 18 Determining which vector to use! 18 Designing the insert fragment! 19 Designing primers! 19 Vector preparation! 19 Insert preparation! 19 Detailed protocol! 20 Step 1: Design oligonucleotides to amplify the product of interest! 20 Step 2: PCR amplification of insert DNA! 20 Step 3: Clean-up purification of PCR product! 21 Step 4: Digestion of products! 21 Step 5: Gel purification of products! 22 Step 6: Ligation! 22 Step 7: Transformation of E. -
Cyclic Digestion and Ligation-Mediated PCR Used For
www.nature.com/scientificreports OPEN Cyclic Digestion and Ligation- Mediated PCR Used for Flanking Sequence Walking Dong Yu1,2,5, Tianshun Zhou2,4,5, Xuewu Sun2,3, Zhizhong Sun2, Xiabing Sheng1,2, Yanning Tan2, Ling Liu2,4, Ning Ouyang2,4, Ke Xu2, Kaibing Shi2, Guilong Yuan2, Jia Ding2, Meijuan Duan3* & Dingyang Yuan1,2,3,4* Ligation-mediated PCR (LM-PCR) is a classical method for isolating fanking sequences; however, it has a common limitation of reduced success rate owing to the circularization or multimerization of target restriction fragments including the known sequence. To address this limitation, we developed a novel LM-PCR method, termed Cyclic Digestion and Ligation-Mediated PCR (CDL-PCR). The novelty of this approach involves the design of new adapters that cannot be digested after being ligated with the restriction fragment, and cyclic digestion and ligation may be manipulated to block the circularization or multimerization of the target restriction fragments. Moreover, to improve the generality and fexibility of CDL-PCR, an adapter precursor sequence was designed, which could be digested to prepare 12 diferent adapters at low cost. Using this method, the fanking sequences of T-DNA insertions were obtained from transgenic rice and Arabidopsis thaliana. The experimental results demonstrated that CDL-PCR is an efcient and fexible method for identifying the fanking sequences in transgenic rice and Arabidopsis thaliana. Identifcation of fanking sequences has ofen been employed to determine the location of T-DNA insertion in genomic DNA. Methods to obtain fanking sequencea include inverse PCR1, randomly primed PCR2–5, and ligation-mediated PCR6–8. Inverse PCR, the earliest fanking cloning technique, has a low efciency and is limited by the rate of self-ligation and amplifcation range of DNA polymerases9. -
Psp73 Vector Technical Bulletin #TB041
tb041.0906.qxp 9/25/2006 10:44 AM Page a Technical Bulletin pSP73 Vector INSTRUCTIONS FOR USE OF PRODUCT P2221. PRINTED IN USA. Revised 9/06 Part# TB041 AF9TB041 0906TB041 tb041.0906.qxp 9/25/2006 10:46 AM Page 1 pSP73 Vector All technical literature is available on the Internet at: www.promega.com/tbs/ Please visit the web site to verify that you are using the most current version of this Technical Bulletin. Please contact Promega Technical Services if you have questions on use of this system. E-mail: [email protected] I. Description..........................................................................................................1 II. Product Components and Storage Conditions ............................................1 III. pSP73 Vector Multiple Cloning Region and Circle Map..........................2 IV. pSP73 Vector Restriction Sites........................................................................4 V. Related Products ................................................................................................6 VI. Reference .............................................................................................................7 I. Description The pSP73 Vector (1) offers a wide range of restriction sites, providing greater versatility in cloning and transcription of RNA in vitro. The pSP73 Vector contains the SP6 and T7 RNA polymerase promoters and a unique multiple cloning region, which includes restriction sites for BglII, EcoRV, ClaI, EcoRI, SacI, KpnI, SmaI, BamHI, XbaI, AccI, SalI, PstI, SphI, HindIII, PvuII and XhoI. The sequences of Promega vectors are available online at www.promega.com/vectors/ and are also available from the GenBank® database. II. Product Components and Storage Conditions Product Size Cat.# pSP73 Vector 20µg P2221 Storage Conditions: Store the pSP73 Vector at –20°C. Promega Corporation · 2800 Woods Hollow Road · Madison, WI 53711-5399 USA Toll Free in USA 800-356-9526 · Phone 608-274-4330 · Fax 608-277-2516 · www.promega.com Printed in USA. -
Psp72 Vector INSTRUCTIONS for USE of PRODUCT P2191
tb040.0906.qxp 9/25/2006 10:12 AM Page a Technical Bulletin pSP72 Vector INSTRUCTIONS FOR USE OF PRODUCT P2191. PRINTED IN USA. Revised 9/06 Part# TB040 AF9TB040 0906TB040 tb040.0906.qxp 9/25/2006 10:12 AM Page 1 pSP72 Vector All technical literature is available on the Internet at: www.promega.com/tbs/ Please visit the web site to verify that you are using the most current version of this Technical Bulletin. Please contact Promega Technical Services if you have questions on use of this system. E-mail: [email protected] I. Description..........................................................................................................1 II. Product Components and Storage Conditions ............................................1 III. pSP72 Vector Multiple Cloning Region and Circle Map..........................2 IV. pSP72 Vector Restriction Sites........................................................................4 V. Related Products ................................................................................................6 VI. Reference .............................................................................................................6 I. Description The pSP72 Vector (1) can be used as a standard cloning vector and can also be used for transcription of RNA in vitro. The pSP72 Vector contains the SP6 and T7 RNA polymerase promoters flanking a unique multiple cloning region, which includes restriction sites for XhoI, PvuII, HindIII, SphI, PstI, SalI, AccI, XbaI, BamHI, SmaI, KpnI, SacI, EcoRI, ClaI, EcoRV and BglII. The sequences of Promega vectors are available online at: www.promega.com/vectors/ and are also available from the GenBank® database. II. Product Components and Storage Conditions Product Size Cat.# pSP72 Vector 20µg P2191 Storage Conditions: Store the pSP72 Vector at –20°C. Promega Corporation · 2800 Woods Hollow Road · Madison, WI 53711-5399 USA Toll Free in USA 800-356-9526 · Phone 608-274-4330 · Fax 608-277-2516 · www.promega.com Printed in USA. -
A Short History of the Restriction Enzymes Wil A
Published online 18 October 2013 Nucleic Acids Research, 2014, Vol. 42, No. 1 3–19 doi:10.1093/nar/gkt990 NAR Breakthrough Article SURVEY AND SUMMARY Highlights of the DNA cutters: a short history of the restriction enzymes Wil A. M. Loenen1,*, David T. F. Dryden2,*, Elisabeth A. Raleigh3,*, Geoffrey G. Wilson3,* and Noreen E. Murrayy 1Leiden University Medical Center, Leiden, the Netherlands, 2EaStChemSchool of Chemistry, University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, Scotland, UK and 3New England Biolabs, Inc., 240 County Road, Ipswich, MA 01938, USA Received August 14, 2013; Revised September 24, 2013; Accepted October 2, 2013 ABSTRACT Type II REases represent the largest group of characterized enzymes owing to their usefulness as tools for recombinant In the early 1950’s, ‘host-controlled variation in DNA technology, and they have been studied extensively. bacterial viruses’ was reported as a non-hereditary Over 300 Type II REases, with >200 different sequence- phenomenon: one cycle of viral growth on certain specificities, are commercially available. Far fewer Type I, bacterial hosts affected the ability of progeny virus III and IV enzymes have been characterized, but putative to grow on other hosts by either restricting or examples are being identified daily through bioinformatic enlarging their host range. Unlike mutation, this analysis of sequenced genomes (Table 1). change was reversible, and one cycle of growth in Here we present a non-specialists perspective on import- the previous host returned the virus to its original ant events in the discovery and understanding of REases. form. These simple observations heralded the dis- Studies of these enzymes have generated a wealth of covery of the endonuclease and methyltransferase information regarding DNA–protein interactions and catalysis, protein family relationships, control of restric- activities of what are now termed Type I, II, III and tion activity and plasticity of protein domains, as well IV DNA restriction-modification systems. -
Promiscuous Restriction Is a Cellular Defense Strategy That Confers Fitness
Promiscuous restriction is a cellular defense strategy PNAS PLUS that confers fitness advantage to bacteria Kommireddy Vasua, Easa Nagamalleswaria, and Valakunja Nagarajaa,b,1 aDepartment of Microbiology and Cell Biology, Indian Institute of Science, Bangalore 560012, India; and bJawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India Edited by Werner Arber, der Universitat Basel, Basel, Switzerland, and approved March 20, 2012 (received for review November 22, 2011) Most bacterial genomes harbor restriction–modification systems, ognition and cofactor utilization, whereas the cognate MTase is encoding a REase and its cognate MTase. On attack by a foreign very site-specific (14). In addition to its recognition sequence, DNA, the REase recognizes it as nonself and subjects it to restric- GGTACC, the enzyme binds and cleaves a number of noncanoni- tion. Should REases be highly specific for targeting the invading cal sequences (i.e., TGTACC, GTTACC, GATACC, GGAACC, foreign DNA? It is often considered to be the case. However, when GGTCCC, GGTATC, GGTACG, GGTACT), with the binding bacteria harboring a promiscuous or high-fidelity variant of the affinity ranging from 8 to 35 nM (14, 15). Accordingly, many of fi REase were challenged with bacteriophages, tness was maximal these sites are cleaved efficiently with kcat values varying from 0.06 − − under conditions of catalytic promiscuity. We also delineate pos- to 0.15 min 1 vs. 4.3 min 1 for canonical sites (15). The promis- sible mechanisms by which the REase recognizes the chromosome cuous activity of the enzyme is directed by a number of cofactors. as self at the noncanonical sites, thereby preventing lethal dsDNA In the presence of the physiological levels of Mg2+, the most breaks. -
NEB Golden Gate Assembly Kit (Bsai-Hfv2) E1601 Manual
INSTRUCTION MANUAL NEB® Golden Gate Assembly Kit (BsaI-HF®v2) NEB #E1601S/L 20/100 reactions Version 2.0_2/20 Table of Contents Golden Gate Assembly Overview ............................................................................................................................................................... 2 pGGAselect Destination Plasmid Description ............................................................................................................................................ 3 Insert Considerations ................................................................................................................................................................................... 4 Golden Gate Assembly Transformation and Plating Protocols ................................................................................................................... 5 Screening Protocols ..................................................................................................................................................................................... 6 Frequently Asked Questions (FAQs) .......................................................................................................................................................... 6 Golden Gate Assembly Tips ........................................................................................................................................................................ 8 Specifications .............................................................................................................................................................................................. -
The Ecori Endonuclease (Temperature-Sensitive Ecori Mutants/DNA Ligase/SOS Response/DNA Repair) JOSEPH HEITMAN, NORTON D
Proc. Nati. Acad. Sci. USA Vol. 86, pp. 2281-2285, April 1989 Genetics Repair of the Escherichia coli chromosome after in vivo scission by the EcoRI endonuclease (temperature-sensitive EcoRI mutants/DNA ligase/SOS response/DNA repair) JOSEPH HEITMAN, NORTON D. ZINDER, AND PETER MODEL The Rockefeller University, New York, N.Y. 10021 Contributed by Norton D. Zinder, November 22, 1988 ABSTRACT We prepared a set of temperature-sensitive Table 1. E. coli strains mutants of the EcoRI endonuclease. Under semipermissive Strain Relevant genotype Source conditions, Escherichia coli strains bearing these alleles form poorly growing colonies in which intracellular substrates are HB101 recAJ3 Ref. 16 cleaved at EcoRI sites and the SOS DNA repair response is JH11 HB101 recAp This study induced. Strains defective in SOS induction (lexA3 mutant) or JH20 K91 IexA3 Ref. 15 SOS induction and recombination (recA56 and recB21 mu- JH27 K91 recA56 This study tants) are not more sensitive to this in vivo DNA scission, JH39 dinDl::Mu dI(Apr lac) Ref. 15 whereas strains deficient in DNA ligase (lig4 and Ug ts7mutants) JH59 JH39 recA56 Ref. 15 are extremely sensitive. We conclude that although DNA JH117 JH39 recB21 thyA::TnJO This study scission induces the SOS response, neither this induction nor JH137 K91 dinDl::Mu dI(Apr lac) This study JH144 K91 recN262 tyrAl6::TnlO This study recombination are required for repair. DNA ligase is necessary JH145 K91 recB2l thyA::TnJO This study and may be sufficient to repair EcoRI-mediated DNA breaks in JH154 JH39 lexA3 maIE::TnJO This study the E. coli chromosome. -
A Versatile Framework for Golden Gate Assembly Andreas I
bioRxiv preprint doi: https://doi.org/10.1101/140095; this version posted May 19, 2017. 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-ND 4.0 International license. Mobius Assembly: a versatile framework for Golden Gate assembly Andreas I. Andreou1,* and Naomi Nakayama1,* SynthSys Centre for Synthetic and Systems Biology, Centre for Science at Extreme Condition, and Institute of Molecular Plant Sciences 1: School of Biological Sciences, Max Born Crescent, Kings Buildings, University of Edinburgh, EH9 3BF, UK *: Co-corresponding authors. [email protected]; [email protected] Mobius Assembly mUAV Α,Β,Γ,Δ Α,Β,Γ,Δ Abstract: Golden Gate Assembly is a powerful synthetic biology tool, which utilizes Type IIS enzymes for unidirectional assembly of multiple DNA fragments. The simplicity of its DNA assembly and the exchangeability of standard parts greatly facilitate the generation of combinatorial assembly libraries. Currently there are two popular Golden Gate Assembly frameworks that allow multigene augmentation (MoClo and Golden Braid); they render either high cloning capacity or vector toolkit simplicity. We have developed a new Golden Gate Assembly framework called Mobius Assembly, which combines vector toolkit simplicity with high cloning capacity. Mobius Assembly is based on a two-level approach and embraces the standard overhangs defined by MoClo and Golden Braid to confer exchangeability, but with reduced domestication requirement. Furthermore, we have implemented drop-out cassettes encoding chromogenic proteins for visible cloning screening. -
A Chloroplast-Resident DNA Methyltransferase Is Responsible for Hypermethylation of Chloroplast Genes in Chlamydomonas Maternal Gametes
A chloroplast-resident DNA methyltransferase is responsible for hypermethylation of chloroplast genes in Chlamydomonas maternal gametes Rie Nishiyama, Mikako Ito, Yube Yamaguchi, Nozomu Koizumi, and Hiroshi Sano* Research and Education Center for Genetic Information, Nara Institute of Science and Technology, Nara 630-0101, Japan Communicated by Arthur B. Pardee, Dana-Farber Cancer Institute, Boston, MA, February 28, 2002 (received for review November 18, 2001) Chloroplast DNA of the green alga Chlamydomonas reinhardtii is progeny (4). Although these experimental data indicate a strong maternally inherited. Methylation mapping directly revealed that, correlation between maternal inheritance of chloroplast DNA before mating, chloroplast DNA of maternal (mating type plus; and its hypermethylation, the available evidence is indirect. The ؉ mt ) gametes is heavily methylated whereas that of paternal present work was thus initiated to determine the cause-result ؊ (mating type minus; mt ) gametes is not. Indirect immunofluores- relationship between the two phenomena. cence analyses with anti-5-methylcytosine mAbs visually showed ؉ methylation to occur exclusively in chloroplast DNA of mt ga- Materials and Methods metes, and not in mt؊ gametes or nuclear DNA of either mt. To Cell Strains and Culture Conditions. Wild-type strains, CC125 (mtϩ) clarify the relationship between methylation and maternal inher- Ϫ itance of chloroplast DNA, we have isolated and characterized a and CC124 (mt ), and mutant strains of chloroplast DNA methylation, CC1312 (mat-1,mtϪ), CC1154 (me-1,mtϩ), and cDNA encoding a DNA methyltransferase. The deduced protein, Ϫ CrMET1, consists of 1,344 aa and contains a conserved catalytic CC1155 (me-1,mt ), were accessed from the Chlamydomonas domain at the C terminal and a nonconserved N-terminal region.