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“Jumping Genes” Lead The Way

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Presentation on theme: "“Jumping Genes” Lead The Way"— Presentation transcript:

1 “Jumping Genes” Lead The Way
Uwe Hilgert, UofA iPlant, BIO5 Institute & CDTIS A bioinformatics/biotech workshop at the AZCTE Conference 2015

2 Research & Teaching PCR Agarose gel electrophoresis Electronic PCR
Sleuth genetic relationships Navigate NCBI DNA Subway Hardy-Weinberg Population Genetics/Allele Server Simulation Server

3 Biology Human migration Polymorphisms and alleles
Random genetic drift vs. selective pressure DNA amplification Mobile genetic elements

4 Bioinformatics Access sequence databases Conduct sequence searches
Perform electronic PCR Explain the various types of sequence searches Retrieve sequences Align sequences Analyze sequences Determine sequence relationships Interpret gene and genome maps Identify Genetic variation

5 Workshop Goodies Stuff Agenda: https://goo.gl/Df1T6f
Repository: Etherpad: People Lead: First TA: Second TA: Organizer:

6 Human Genome Human genome: Other Animation 25% protein-coding genes
3% protein-coding sequence 50% repetitive DNA 25% Alu and Line (L1) retro-transposons Other Corn: 75% Transposons Lily: 98% Transposons Animation Chr 11 Flyover Iris brevicaulis

7 Transposons Mode of transposition Structure Level of independence
Excise and Insert (Transposons, Transposase protein) Copy and Paste (Retroposons, Reverse Transcriptase protein) Structure Central: Genes for “mobility proteins” Flanking: Mobility protein action sites (repeats) Level of independence Have genes & flanks  can jump by own volition (Line, Ac) No genes; flanks ok  can be jumped (Alu, Ds) Genes, flanks faulty  can jump others

8 How do organisms live with TEs?
Most TEs are broken (cannot tranpose; “fossils”). Active TEs evolved to insert into “safe-havens.” Host regulates TE movement. “Stress” conditions may activate TEs. TEs can provide advantages. Transposable elements can shake up otherwise conservative genomes and generate new genetic diversity.

9 TEs can alter gene expression
Can this have phenotypic consequences? Nipponbare EG4 EG4 is salt tolerant

10 Whose Ancestor? Mom + Dad DNA “Blood” relatives share DNA
PV92 locus/site in human genome Exists in different form/alleles Alternative allele arose about 100,000 years ago No selection Simulation Server

11 Whose Ancestor? PV92 Wetlab PV92 eLab Cheek-cell DNA ePCR PCR
Agarose gel Personal PV92 eLab ePCR PV92 locus/site PV92 in humans Species (Specia-l) “Blood” relatives share DNA PV92 locus/site in human genome Exists in different forms/alleles Alternative allele arose about 100 kya No selection

12 Workshop Goodies Stuff Agenda: https://goo.gl/Df1T6f
Repository: Etherpad: People Lead: First TA: Second TA: Organizer:


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