Biotechnology - websites.rcc.eduwebsites.rcc.edu/tayyar/files/2013/08/Chapter-15-Biote… · ·...
Transcript of Biotechnology - websites.rcc.eduwebsites.rcc.edu/tayyar/files/2013/08/Chapter-15-Biote… · ·...
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Biotechnology
DNA Cloning
Genetic Engineering
Gene Therapy
Common Techniques Used in Biotechnology
CRISPR
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What is DNA Cloning? Set of methods that uses live cells to make many identical copies of a DNA fragment
Restriction enzymes Cut DNA at specific nucleotide sequences Leave single-stranded tails/ “sticky ends”
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Recombinant DNA A DNA molecule that contains genetic material from more than one organism
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Cloning vector A DNA molecule that accepts foreign DNA and carries it into a host cell/ bacterial plasmids
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Stone washed jeans
Protein to dissolve blood clots
Inserting gene for pest resistance
Altering bacteria for cleaning up toxic waste
DNA cloning mass produces specific DNA fragments
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Technique used to mass-produce (amplify) copies of sections of DNA without having to clone in living cell
Polymerase chain reaction (PCR)
DNA Nucleotides Taq Polymerase Primers Buffers
Thermocycler
Steps Denaturation Annealing Elongation
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DNA Sequencing
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Electrophoresis
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Genomics: Study of whole-genome structure and function
Proteomics: Study of the comprehensive set of proteins produced by an organism or a cellular system
Bioinformatics: Developing computational tools to analyze and interpret biological data
758 GATAATCCTGTTTTGAACAAAAGGTCAAATTGCTGAATAGAAA–GTCTTGATTAACTAAAAGATGTACAAAGTGGAATTA 836 Human 752 GATAATCCTGTTTTGAACAAAAGGTCAAATTGCTGAATAGAAA–GTCTTGATTAACTAAAAGATGTACAAAGTGGAATTA 830 Mouse 751 GATAATCCTGTTTTGAACAAAAGGTCAAATTGCTGAATAGAAA–GTCTTGATTAACTAAAAGATGTACAAAGTGGAATTA 829 Rat 754 GATAATCCTGTTTTGAACAAAAGGTCAAATTGCTGAATAGAAA–GTCTTGATTAACTAAAAGATGTACAAAGTGGAATTA 832 Dog 782 GATAATCCTGTTTTGAACAAAAGGTCAAATTGCTGAATAGAAA–GTCTTGATTAACTAAAAGATGTACAAAGTGGAATTA 860 Chicken 758 GATAATCCTGTTTTGAACAAAAGGTCAAATTGCTGAATAGAAA–GTCTTGATTAAGTAAAAGATGTACAAAGTGGAATTA 836 Frog 823 GATAATCCTGTTTTGAACAAAAGGTCAGATTGCTGAATAGAAAAGGCTTGATTAAAGCAGAGATGTACAAAGTGGACGCA 902 Zebrafish 763 GATAATCCTGTTTTGAACAAAAGGTCAAATTGTTGAATAGAGACGCTTTGATAAAGCGGAGGAGGTACAAAGTGGGACC– 841 Pufferfish
A gene for DNA Polymerase
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DNA Profiling Identifying an individual by analyzing the unique parts of his or her DNA
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Human Genome Project/ completed 2003
Human genome consists of about three billion nucleotides Only about 21,000 genes Only about 1.5% of DNA contains genes that code for proteins
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Costs are Decreasing Dramatically
Arabidopsis
Genome
3 Gb
0.125 Gb
Human ~$1 billion
$70 mil
Time to complete Length
5+ years
Cost by Sanger
4 years
Yeast 0.012 Gb 3 years $10 mil
Cost by Illumina
< $20
< $200
~$4000
Time to complete
< 2 week
< 2 week
< 2 week
Present time: few hours and $1000 to sequence the human genome
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Ø Process by which an individual’s genome is deliberately modified
Ø Produces a genetically modified organism (GMO) Ø A gene may be altered and reinserted into an
individual of the same species Ø A gene from one species may be transferred to
another to produce an organism that is transgenic Ø Most common GMOs are bacteria and yeast
Genetic Engineering
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GM E. coli
GM Zebra fish
GM Goat
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GM bacteria Ø Produce medically important proteins such as
insulin
Ø Produce enzymes used in food manufacturing
Ø Produce enzymes used to improve taste of beer and fruit juice and slow bread from staling
Engineered Microorganisms
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GM Plants Disease resistance Improved yield Improved salt, frost, …. tolerance Improved nutritional value Resistance to pesticides
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The case of BT corn Enhanced through biotechnology to enable it to protect itself against the corn borer, which is one of the most destructive insects to damage or reduce corn production and one of the most economically significant crop pests in the world
Monarch butterflies
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Ø Mice: used for medical research
Ø Goats: genetically engineered to have proteins that treat cystic fibrosis, heart attacks, etc.
Ø Rabbits: genetically engineered to make interleukin-2
Ø Pigs: modified for heart-healthy fat
Ø Trout and salmon: bigger versions
Ø Farm animals: produce more meat or milk
GM Animals
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www.GMOANSWERS.com
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Ø Tested to treat AIDS, Alzheimer, Cystic fibrosis, muscular dystrophy and others
Ø A genetically modified virus is used
Ø Risks
Experimental technique that is used to transfer a normal or modified gene into a person with a genetic disorder
Gene Therapy
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CRISPR Clustered Regularly Interspersed Short
Palindromic Repeats
Ø Allows for genome editing
Ø Removing mutated gene and replacing them by normal genes
Ø Based on restriction enzymes that are guided to specific locations in the genome by specifically designed RNA molecules
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https://www.bing.com/videos/search?q=crspr+videos&view=detail&mid=0533F06520B1126615B50533F06520B1126615B5&FORM=VIRE