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TIGR "Tree of Life" Project Slides (from 2004)
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Transcript of TIGR "Tree of Life" Project Slides (from 2004)
![Page 1: TIGR "Tree of Life" Project Slides (from 2004)](https://reader036.fdocuments.in/reader036/viewer/2022062513/554e8de1b4c90573338b4c09/html5/thumbnails/1.jpg)
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Phylogenomics:A Genome Level Approach to
Assembling the Bacterial Branches of the Tree of Life
TIGR:Jonathan A. Eisen
Naomi WardKaren E. Nelson
Jonathan H. BadgerJames SakwaMartin Wu
Dongying WuKevin Penn
COMB:Frank T. Robb
Elizabeth M. O’ConnorJulie Enticknap
Tim Steppe
http://www.tigr.org/tol
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Background I: rRNA Tree
• Phenotype not very useful for bacterial phylogeny
• Most molecular studies based on 16s rRNA sequence analysis
• Studies of other genes do not always agree with rRNA, especially for deep branches
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from Woese 1987
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Background II:Most Bacteria Have Never Been Cultured
• Microscopic and molecular studies show that <1% of the microbes in most environments have been grown in pure culture
• True in terms of #s and phylogenetic diversity
• This means we know little about their biology
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Background III:Genomics Has Revolutionized Bacteriology
• Predictions of biology
• Drug design, vaccine development
• Functional genomic studies
• Evolutionary reconstructions– Whole genome phylogeny– Lateral gene transfer– Population genomics
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Biased Sampling of Bacterial Genomes
Hugenholtz 2002
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AutomatedWholeGenomePhylogeny
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TIGR Tree of Life Project
• Major goal– Increase phylogenetic diversity of genome sequences
• Three sub-goals– Resolve relationships among the phyla– Launch experimental studies of these phyla– Inform environmental studies of uncultured microbes
• The Players– TIGR (Jonathan Eisen, Naomi Ward, Karen Nelson et
al.)– COMB (Frank Robb et al.)
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0.1
Acidobacteria
CFB
Fibrobacteres
Gemmimonas
Verrucomicrobia
Planctomycetes
Chloroflexi
Proteobacteria
Chlorobi
FirmicutesFusobacteria Actinobacteria
Cyanobacteria
Chlamydia
Spriochaetes
Deinococcus-Thermus
Aquificacae
Thermotogae
TM6OS-K
Termite GroupOP8
Marine GroupAWS3
OP9
NKB19
OP3
OP10
TM7
OP1OP11
Nitrospira
SynergistesDeferribacteres
Thermodesulfobacteria
Chrysiogenetes
Thermomicrobia
Dictyoglomus
Coprothermobacter
This project
PublishedIn progress
Uncultured lineage
Tree based on Hugenholtz (2002) with some modifications.
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Phylum
Species selected Growth, DNA isolation
Libraries Shotgun Coverage
Estimated Genome Size (Mb)
# of Contigs
Auto- Annotated
Chrysiogenes
Chrysiogenes arsenatis + + 4x 2.5 155 +
Coprothermobacter
Coprothermobacter proteolyticus (CP) + + 8x 1.38 3 +
Dictyoglomi
Dictyoglomus thermophilum (DT) + + 8x 2.0 9 +
Thermodesulfobacteria
Thermodesulfobacterium commune (TC) + + 8x 1.78 26 +
Nitrospirae
Thermodesulfovibrio yellowstonii (TY) + + 8x 1.98 27 +
Thermomicrobia
Thermomicrobium roseum + + 8x 3.4 82 +
Deferribacteres
Selecting from Deferribacter thermophilus, Geovibrio thiophilus, Flexistipes sinusarabici
+ In progress
Synergistes
Selecting from Synergistes jonesii, Aminobacter colombiense, Thermanaerovibrio acidaminovorans, Aminomonas paucivorans, Dethiosulfovibrio peptidovorans
+ In progress
Genome Sequencing Progress
Type Strain or Species Selected When Possible
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Goal I:
Relationships Among Phyla
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Concatenated Alignment ML Tree
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Proteobacteria
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Green Non Sulfur Bacteria
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Goal II:
Biology of These Phyla
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QuickTime™ and aTIFF (LZW) decompressor
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Goal III:
Uncultured Microbes
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Key Issues in Uncultured Microbes
• Questions– 1. Who is out there?– 2. What are they doing?– 3. Need to connect 1 and 2.
• Answers– 1. Phylogenetic anchors– 2. Genomics– 3. Linking anchors to genomics contigs
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Phylogenetic Anchors and the Sargasso Sea Shotgun Sequencing
shotgunshotgun
sequencesequence
Warner Brothers, Inc.Warner Brothers, Inc.
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rRNA as a Phylogenetic Anchor
Venter et al., 2004
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Shotgun Sequencing Allows Use of Alternative Anchors (e.g., RecA)
Venter et al., 2004
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Biased Sampling of Bacterial Genomes
Hugenholtz 2002
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Our Tree of Life Genomes Allow
Anchoring of 100s of clones from
Yellowstone Mats
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Tree of GYOAP59TF
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Blast of GYOAP59TF
>ORF02612-TG_gtr_857 rho transcription termination factor Rho {Thermomicrobium_roseum_DSM5159} Length = 426
Score = 1177 (419.4 bits), Expect = 2.9e-119, P = 2.9e-119 Identities = 232/232 (100%), Positives = 232/232 (100%)
Query: 1 VAPIGRGQRGLIVSPPKAGKTVLLKHIANGITTNYKDIHLIVLLIGERPEEVTDMRRSVD 60 VAPIGRGQRGLIVSPPKAGKTVLLKHIANGITTNYKDIHLIVLLIGERPEEVTDMRRSVDSbjct: 191 VAPIGRGQRGLIVSPPKAGKTVLLKHIANGITTNYKDIHLIVLLIGERPEEVTDMRRSVD 250
Query: 61 GEVISSTFDEPVEDHIRVAEMTLERAKRLVECGMDVVILLDSITRLARAYNLSVPPSGRT 120 GEVISSTFDEPVEDHIRVAEMTLERAKRLVECGMDVVILLDSITRLARAYNLSVPPSGRTSbjct: 251 GEVISSTFDEPVEDHIRVAEMTLERAKRLVECGMDVVILLDSITRLARAYNLSVPPSGRT 310
Query: 121 LSGGIDPVALYPPKRFFGAARNIEGGGSLTIIATCLVDTGSRMDDVIYEEFKGTGNMELH 180 LSGGIDPVALYPPKRFFGAARNIEGGGSLTIIATCLVDTGSRMDDVIYEEFKGTGNMELHSbjct: 311 LSGGIDPVALYPPKRFFGAARNIEGGGSLTIIATCLVDTGSRMDDVIYEEFKGTGNMELH 370
Query: 181 LDRKLAERRIFPAIDIQRSGTRREELLLDEQTLRQVWTMRRMVSMLGGTDGT 232 LDRKLAERRIFPAIDIQRSGTRREELLLDEQTLRQVWTMRRMVSMLGGTDGTSbjct: 371 LDRKLAERRIFPAIDIQRSGTRREELLLDEQTLRQVWTMRRMVSMLGGTDGT 422
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Broader Impact
• Genome sequence data released to TIGR web site• Genome Users Workshop to be held at TIGR in
2005• Project used as model for evolution teaching in
talks to HHMI, MD Science Teachers Assocation, and Montgomery County high school science teachers
• Project promoted to public through radio and print media
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Training• Student involvement
– Kevin Penn, technician at TIGR– Temylope Adeyefa-Olasupo, U. Md Undergrad working
at COMB – Rebecca Brocato, high school intern, COMB– Joseph Wister, TIGR Summer Fellow with Karen Nelson– Ryan Corces-Zimmerman, high school intern working at
TIGR
• Teaching using this project– MBL Molecular Evolution Workshop– MBL Genomics Workshop– Jackson Lab Genomics Workshop
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Future Issues
• New estimates suggests > 100 bacterial phyla
• Someone needs to cover Archaeal diversity
• Need DNA repository