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“It has not escaped our attention that the structure provides a mechanism for replication”
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Two breakthroughs
Yellowstone
DNA Sequencing
PCR Amplification of DNA
Spooling DNA
1. Open top of the bottle marked DNA.2. Open top of the bottle marked Alcohol3. Pour alcohol (full bottle) into DNA4. Insert wooden end of toothpick into liquid5. Twirl stick You are spooling DNA!
You can repeat this experiment by takingthe DNA and placing it in water and a pinchof table salt. Let redissolve, add alcohol and repeat
Over 1000 organism’s genomes have been sequenced
599 viruses205 plasmids185 organelles3 eubacteria7 archae1 fungus (yeast)2 animals (worm and fly)1 plant (Arabadopsis)1 mammal (human)
Species Number of genesBacteria (E. coli) 4,000
Fungi (S. cerevisiae) 6,000
Worm (C. elegans) 20,000
Fly (Drosophila) 12-14,000
Plant (Arabidopsis) 25,000
Mouse 30,000
Human 30,000
The Discovery of Cell Cycle Checkpoints
Checkpoint mutants: Live Hard and Die Fast
Cell Cycle Checkpointsand Cancer
Checkpoints ensure that cells complete one event before proceeding to the next event
Cancer is a disease of uncontrolled cell growth, sloppy DNA replication and errors in chromosomesegregation
Distribution of Homologs
Prokaryotes only
Eukaryote and
prokaryote
No animal homology
Animals and other
eukaryotes
Vertebrate only
Vertebrates and other animals
32% of human genes have homologues in fly, worm and yeast
Of 1,308 protein families, only 94 are specific to vertebrates
We’re unique not because of the parts list,
Rather how the parts are put together
• Only 5% of our genome codes for protein
• 50% of the genome is simple repeat sequence
Our fossil record is exposed!
• 13 chromosomal rearrangements separate our chromosomes from the cat
Functional Assays
Proteomics – Develop assays to study the function of 30,000 proteins
Imaging Informatics – Protein location and dynamicsor Where is everyone ?
Bioinformatics – Mining the 3 billion bits of information in the genome
Jellyfish on the eastern shore
Genetic disease
Map
Clone gene
Diagnostics
Gene therapy
Understand basic biologic defect
Preventive medicine
Pharmacogenomics
Drug therapy
Time
Paradigm Shifts in Biomedical Research
Genetically based, individualized preventive medicine
Shift from treating symptoms to genetic therapy
Determine genetic profile for battery of diseases Pharmacogenomics- prophylactic drug regimenIdentify disposition of offspring
THANKS !!!
Special thanks to
John Anderson Purdue University
Rachael Bloom
Paradigm Shifts in Biomedical Research
Structural genomics Functional genomic
Genomics Proteomics
Map-based gene discovery Sequence-based discovery
Monogenic disorders Multifactorial disorders
Specific DNA diagnosis Monitoring of susceptibility
Analysis of one gene Analysis of multiple genes
Gene action Gene regulation
Specific mutations Mechanism
One species Several species
The Cell Cycle
G1
DNA synthesis
G2
Mitosis
Charles Darwin
Gregor Mendel
Barbara McClintock
Digital Imaging Microscopy
Z-series0.75 µm apart
Compiled