AUTOMATED BIOINFORMATICS TO EVALUATE THE RELATIVE ... · Durandal Denis Baurain Damien Sirjacobs....
Transcript of AUTOMATED BIOINFORMATICS TO EVALUATE THE RELATIVE ... · Durandal Denis Baurain Damien Sirjacobs....
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AUTOMATED BIOINFORMATICS TO EVALUATE THE RELATIVE CONTRIBUTION
OF ENDOSYMBIOSIS AND KLEPTOPLASTY IN THE EVOLUTION OF COMPLEX RED ALGAE
Mick Van Vlierberghe ([email protected]) and Denis Baurain ([email protected])
InBioS – PhytoSYSTEMS, Eukaryotic Phylogenomics, University of Liège, Liège, Belgium
Ciccarelli et al., 2006
7th European Phycological CongressTuesday, 27th August
Zagreb, Croatia
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Ponce‐Toledo, R. I., López‐García, P., & Moreira, D. (2019).
2
Complex Algae - Panorama
CASH lineages
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Endosymbiosis and EGT
- Single source
Bodyl et al., 2009
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Gene mosaicism
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Models
5
MorozovA.A.GalachyantsYuri P 2019.
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“Shopping bag” by kleptoplasty
- real selective pressure
Gagat et al., 2014
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Origin of 3 membranes plastids ?
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Testing the hypothesis
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AIM
Provide additional (phylogenetic) data to illuminate the debate…in an automated fashion
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Gene diversity
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Gene set
- plastid targeted genes
(experimental)
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Bigelowiella natans
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Guillardia theta
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Dinophysis acuminata
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Karenia brevis
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Karlodinium venificum
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Durinskia baltica
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Kryptoperidinium foliaceum
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Euglena gracilis
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MAKING-OF
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KRONA TOTAL
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Pipeline
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Forty-Two
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Forty-Two - additional features
★ CAP3 (nt)○ contiguing overlapping orthologuous transcripts
★ Alignment (BLAST/Exonerate)○ closest relative
★ Redundancy check○ merging of fragments from the same transcript○ No chimeras
★ Taxonomic affiliation○ best-hit/lca○ contamination detection with ribosomal markers
★ Forty-Two publicly available @ https://metacpan.org/pod/Bio::MUST::Apps::FortyTwo
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Tree parsing and inference
★ clan-level parsing
★ polarising unrooted trees
★ minimum species sampling for giving/receving
★ time constraints
Cryptophyta
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Paraphyly - Intruders - Taxonomy
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Take-home message and improvements
★ Data quality○ conscientious contamination handling○ completeness
★ Subcellular localisation tagging
★ Proficient orthogroups enrichment○ out-paralogy handling
★ Sophisticated tree splitting and parsing○ taxonomy aware ○ paraphyly detection○ intruders tolerance
★ Biological insight○ nm bearing algae○ Dinophysis
★ sampling++?
★
★ accurate & broad scale plastid dating★ adjacent group inference ?
★ other measures ?
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DurandalDenis Baurain
Damien Sirjacobs
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Complex Algae - Panorama
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Grosche et al., 2014
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Cryptophyta- 4 membranes- nucleomorph
Haptophyta Ochrophyta
- 4 membranes
ApicomplexaChromerida
- 4 membranes
Chlorarachniophyta- 4 membranes- nucleomorph
EuglenaDinophyceae
- 3 membranes- nucleomorph
Why Kleptoplasty ?
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1 - Mechanisms
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38
Wisecarver et al., 2010
Actual Kleptoplastids
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