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Comprehensive Identification of Conditionally Essential Genes in Mycobacteria Proc Natl Acad Sci U S A. 2001 Oct 23;98(22):12712-7. Epub 2001 Oct 16.

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Presentation on theme: "Comprehensive Identification of Conditionally Essential Genes in Mycobacteria Proc Natl Acad Sci U S A. 2001 Oct 23;98(22):12712-7. Epub 2001 Oct 16."— Presentation transcript:

1 Comprehensive Identification of Conditionally Essential Genes in Mycobacteria Proc Natl Acad Sci U S A. 2001 Oct 23;98(22):12712-7. Epub 2001 Oct 16.

2 How to Determine the Functions of Genes? DNA microarray PCR based mutagenesis Signature tagged mutagenesis (STM) Genomic Analysis and Mapping By in vitro Transposition (GAMBIT)

3 Nature Reviews Genetics 7:929-939 (2006)

4 Signature Tagged Mutagenesis (STM) Nature Reviews Genetics 7:929-939 (2006)

5 Genomic Analysis and Mapping By in vitro Transposition (GAMBIT) Annual Review of Microbiology 53:129-54 (1999)

6 Nature Reviews Genetics 7:929-939 (2006)

7 Generation of Mutant Libraries

8 Labeled RNA Synthesis

9 Transposon-Site Hybridization Rich mediumMinimal medium

10 Minimal medium Rich medium

11 Rich medium Minimal medium Gene Ratio (Rich/Minimal) Auxotrophic Mutations Identified by TraSH

12 leuB leuD ilvA Superpathway of Leu, Val, and Ile biosynthesis BioCyc

13 Superpathway of sulfate assimilation and Cys biosynthesis cysD cysH BioCyc

14 EMBO Journal 15:5470-5479 (1996)

15 Codon Usage of M. bovis TAT/TACTyr2.06% (100% of Tyr) TTA/CTALeu0.63% (6.4% of Leu) ATAIle0.22% (5.2% of Ile) GTAVal0.48% (5.6% of Val) TAA/TAGStop0.14% (46.6% of Stop) TATAAT-10 element CBS

16 Thanks for your attention!


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