Functional Genomics Research Stream The Research Plan Tuning In Is A Good Idea Research Meeting: March 23, 2010 The Road to Publication Transcription Factors Protein that binds specific DNA sequences controlling the activation or repression of. start stop cis-regulatory sequence
Transcription Factors Protein that binds specific DNA sequences controlling the activation or repression of. Transcription Factors Protein that binds specific DNA sequences controlling the activation or repression of. start stop start stop cis-regulatory sequence cis-regulatory sequence AAAAAAAAAAAA mrna produced One Gene Whole Genome (Saccharomyces cerevisiae has 16 chromosomes + mitochondrial DNA) 1000 200K start stop cis-regulatory sequence mrna produced AAAAAAAAAAAA start stop cis-regulatory sequence AAAAAAAAAAAA mrna produced
Whole Genome (Saccharomyces cerevisiae has 16 chromosomes + mitochondrial DNA) 1000 200,000 Whole Genome (Saccharomyces cerevisiae has 16 chromosomes + mitochondrial DNA) 1000 200,000 I II III IV V VI VII VIII I I II III IV V VI M I II III IV V VI VII VIII I I II III IV V VI M Affinity Purification Review
RNA Polymerase II RNA Polymerase II RNA Polymerase II RNA Polymerase II AAAAAAAAAAAAA AAAAAAAAAAAAA Ribosome
Ribosome RNA Polymerase II AAAAAAAAAAAAA The Experiment (ChIP-seq) (1) cross-link proteins to genomic DNA
(1) cross-link proteins to genomic DNA (1) cross-link proteins to genomic DNA (2) shear genomic DNA (2) shear genomic DNA (3) affinity purify factors (1) cross-link proteins to genomic DNA (1) cross-link proteins to genomic DNA (2) shear genomic DNA (2) shear genomic DNA (3) affinity purify factors (3) affinity purify factors (4) reverse the cross-links (4) reverse the cross-links (5) purify DNA fragments
(5) sequence DNA fragments (1) cross-link proteins to genomic DNA (2) shear genomic DNA (3) affinity purify factors (4) reverse the cross-links (5) purify DNA fragments (5) sequence DNA fragments (5) sequence DNA fragments (5) sequence DNA fragments (6) map DNA sequences to genome (6) map DNA sequences to genome (7) establish consensus sequences
(5) sequence DNA fragments (6) map DNA sequences to genome (1) cross-link proteins to genomic DNA (2) shear genomic DNA (7) establish consensus sequences (3) affinity purify factors (8) elucidate peaks How do we actually accomplish this purification? Input DNA Pre Clearing Other Protein Other DNA Sepharose Bead Other Protein Other DNA (Transcription Factor Protein) a (Transcription Factor Protein) a Other Protein Y Other Protein Y
Immunoprecipitation (Transcription Factor Protein) Protein A a Sepharose Bead IgG Immunoglobulin G IgG IgG molecules are synthesized and secreted by plasma B cells built of two heavy chains and two light chains each IgG has two antigen binding sites most abundant immunoglobulin, secondary immune response is approximately equally distributed in blood and in tissue liquids, constituting 75% of serum immunoglobulins in humans Protein A 40-60 kda surface protein cell wall of bacteria Staphylococcus aureus binds with immunoglobulins through interaction with the heavy chain Input DNA Pre Clearing Input DNA (Transcription Factor Protein) a Immunoprecipitation
Whole Genome (Saccharomyces cerevisiae has 16 chromosomes + mitochondrial DNA) 1000 200,000 Whole Genome (Saccharomyces cerevisiae has 16 chromosomes + mitochondrial DNA) 1000 200,000 I II III IV V VI VII VIII I I II III IV V VI M I II III IV V VI VII VIII I I II III IV V VI M I II III IV V Whole Genome (Saccharomyces cerevisiae has 16 chromosomes + mitochondrial DNA) 1000 200,000 Which Transcription Factors? Characterized Cell Cycle Regulators VI VII VIII SWI5 MCM1 ACE2 SWI4 FKH1 FKH2 I I II III IV V start stop VI M cis-regulatory sequence
Which Transcription Factors? How Did I Choose These Factors? Characterized Cell Cycle Regulators SWI5 MCM1 ACE2 start SWI4 FKH1 FKH2 stop cis-regulatory sequence Cell (2001) vol. 106 (6) pp. 697-708 1 sample ~100 ml at each time point 2 9 sample ~100 ml at each time point 3 8 4 7 5 6
Possible Cell States Synchrony
sample ~100 ml at each time point 1 2 sample ~100 ml at each time point 9 3 8 4 7 5 6 1 2 Experimental Data Collected 1 2 3 4 5 6 7 8 9 9 3 SWI5 What is the end goal? 8 4 MCM1 ACE2 FKH2 7 5 SWI4 FKH1 6
Alternative plan? Cell (2001) vol. 106 (6) pp. 697-708 Experimental Data Collected 5 6 7 8 9 8 7 6 9 SWI5 MCM1 ACE2 Research Progress Report IV 5
Business Issues Research Progress Report IV Boxes in Freezer (not racks), By Friday! RNA, DNA, PCR Checkpoint ChIP Reagents Aliquoted MiniBead Beater Training & Video Sonicator Training & Video