PPT-L040803T RDT–2 Restriction Enzymes

Restriction Modification System Cutting DNA molecules Before 1970s there was no method of cleaving DNA at the specific points All the available methods for fragmenting DNA were nonspecific. Recombinant DNA Technology. T. echnique that allows DNA to be . combined. from different sources. DNA code universal. Foundation of genetic engineering. Review. What are enzymes? What function do they serve?. Richard J. Roberts. New England Biolabs. CSHL - . 2013. AHA!. Danna, K., Nathans, D. (1971) Specific cleavage of simian virus 40 DNA by restriction endonuclease of . Hemophilus. influenza. . Proc. Natl. Acad. Sci. USA 68: 2913-2917. . Presented by Fotios Patsalis . Bio . 446/546 FALL 2016. M/F 13.00-15.50h,. Castetter. . Hall 37. Restriction Enzymes: Molecular Scissors. Restriction enzymes (. endonuleases. ) are specific endonucleases which . protein. !. Enzymes are . Biological . catalysts . that . increase. . the rate of metabolic reactions.. Since enzymes speed up chemical reaction rates, what are they called?. Catalyst- . A substance . Objectives. -Understand how Restriction Enzymes digest DNA.. -Know how to construct a . pAMP. . (plasmid) or gel.. -Given the size of fragments, gel, know how to construct a restriction map.. -Given a restriction map know how to construct a gel.. Restriction enzymes. Polymerase enzyme. Strand-displacing polymerases. Helicase enzymes. Discovery and Obtainability:. Most enzymes are proteins discovered in cells.. But . DNAzymes. were . descovered. are. . working. ?. Restriction. Enzymes. Natural . occurrence. . of. . restriction. . enzymes. . is. in . bacteria. . for. . protecting. . them. . against. a . virus. . attack. . by. . : An enzymes that breaks down nucleic acid molecule by breaking the phosphodiester bonds at end 3. / . or 5. /.. Endonucleases. : . An Enzyme that hydrolyzes internal phosphodiester bonds in a polynucleotide chain or nucleic acid molecules.. Enzymes. Back when we discussed proteins, we learned that one critical function of protein was to speed up chemical reactions.. Enzymes. are the proteins that increase the rate of chemical reactions. Restriction enzymes . Restriction enzymes . (or restriction endonucleases), are bacterial enzymes that cleave both strands of DNA at or near specific recognition nucleotide sequences (4 -8 bp ) known as restriction sites. . 1. https://. socratic.org. /questions/why-are-restriction-enzymes-important-for-recombinant-dna-technology. Restriction enzymes sometimes called molecular scissors . PART 1: Background. What do restriction enzymes do . by. Ms. . P. . . H. . Giri. Department of Microbiology. Deogiri . College, Aurangabad. B.Sc. T. Y. . Semester VI. Paper No. XIX. Recombinant DNA Technology. Ms. . Priyanka. H. . Giri. Types of R.E.:. Presented . by. Ms. . P. . . H. . Giri. Department of Microbiology. Deogiri . College, Aurangabad. B.Sc. T. Y. . Semester VI. Paper No. XIX. Recombinant DNA Technology. Ms. . Priyanka. H. . Giri. Steps in RDT:. Cutting DNA molecules. . Before 1970s, there was no method of cleaving DNA at the specific points.. All the available methods for fragmenting DNA were non-specific.. Mechanical shearing.