Evoluce 7 2013
This presentation is the property of its rightful owner.
Sponsored Links
1 / 24

Evoluce 7 2013 PowerPoint PPT Presentation


  • 53 Views
  • Uploaded on
  • Presentation posted in: General

Evoluce 7 2013. Glansdorff et al 2008 Biology Direct 2008, 3 :29 . sn -glycerol 3- phosphate fosfolipidy. sn - glycerol 1- phosphate. Archebakterie (Archaea) – doména s unikátním složením membrán. , Eukaryota. and Eukaryota.

Download Presentation

Evoluce 7 2013

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Evoluce 7 2013

Evoluce 7 2013


Evoluce 7 2013

Glansdorffetal2008 Biology Direct 2008, 3:29 


Evoluce 7 2013

sn-glycerol 3-phosphate

fosfolipidy

sn-glycerol 1-phosphate


Archebakterie archaea dom na s unik tn m slo en m membr n

Archebakterie (Archaea) – doména s unikátním složením membrán

, Eukaryota

and Eukaryota


Evoluce 7 2013

Figure 1.Committing steps in the biosynthesis of membrane lipids. The "primary divide" separating Archaea from Bacteria and Eukarya is outlined.

Glansdorffetal 2008 Biology Direct 2008, 3:29 


Evoluce 7 2013

Luis Villareal: Can viruses make us human?

http://cvr.bio.uci.edu/downloads/03_villa_canvir.pdf

(scifi: Greg Bear: Darwinovo rádio) - zkoušet to nebudu


Evoluce 7 2013

(7) Archaea arose by reductive evolution under selection for adaptation to high temperatures; this entailed the replacement of sn1,2 ester fatty acid lipid by sn2,3 ether isoprenoid lipids in the cell membrane, without major enzymatic reconversion.

(8) Bacteria arose by reductive evolution; secondary, convergent adaptations to thermophily entailed the formation of a variety of membrane lipids, often with ether bonds, but still with a sn1,2 stereoconfiguration.


Evoluce 7 2013

(9) LUCA wasgeneticallyredundant; thereforethedifferentiallossofparalogous gene copies in different lines ofdescentis a predictedsource ofphylogeneticdiscrepancieswithrespect to the SSU-rRNAtree.


Evoluce 7 2013

(3) LUCA was a protoeukaryote, with a RNA genome inherited from its progenote ancestor. This RNA LUCA was in a metabolically and morphologically heterogeneous community, constantly shuffling around genetic material. Part of it was phagotrophic. LUCA remained an evolutionary entity, though loosely defined and constantly changing, as long as this promiscuity lasted.

(4) The RNA to DNA transition took place independently in different lineages of this community; the intervention of viruses appears a likely mechanism. This process led to the emergence of the three Domains.


Evoluce 7 2013

(1) Theword "prokaryote" has becomeinadequateandmisleading.

(2) Eukaryoticidiosyncrasiesand a reappraisalofphylogeny do not support thenotionof a prokaryotic LUCA nor ofprokaryoticancestorsoftheeukaryotic cell body. Theorderofbranching in theuniversaltree has no bearing on thecellulararchitectureof LUCA.


Evoluce 7 2013

Glansdorffetal2008 Biology Direct 2008, 3:29 


Evoluce 7 2013

E.V. Koonin: vývoj buněk z pradávného světa virů

Např. Biology Direct 1, 29, 2006

http://www.pubmedcentral.nih.gov/picrender.fcgi?artid=1594570&blobtype=pdf

Biological big bang

Biol. Direct 2,21,2007


Evoluce 7 2013

Embley & Martin, Nature Vol 440|30 March 2006|


Evoluce 7 2013

  • Bakteriální biosféra

  • sdílený genový pool → Bakteriální promiskuita– transdukce, transformace, konjugace

  • sdílené signály → quorumsensing

  • mezibuněčná hmota → konsorcia, povlaky, stromatolity etc.


Evoluce 7 2013

The greatest surprise resulting from the application of genomics tobacteriology was the extent of genomic variability within many bacterial species.

Bacterial pathogenomics

Mark J. Pallen1 & Brendan W. Wren

NATURE|Vol 449|18 October 2007|


Evoluce 7 2013

Origins of Highly Mosaic Mycobacteriophage Genomes

Part of the Che8 genome shown in (A) is

also shared by phage Corndog. The 378 bpshared regions are 100% identical and theirjoint appearance in these phages must bederived from a recent evolutionary event.

Cell, Vol. 113, 171–182, April 18, 2003


Evoluce 7 2013

Luis Villareal: Can viruses make us human?

http://cvr.bio.uci.edu/downloads/03_villa_canvir.pdf

(scifi: Greg Bear: Darwinovo rádio) - zkoušet to nebudu

Viry v prostředí: obrovská diverzita (statisíce)

„virioplankton: 106-109 částic/ml

metagenomika

Angly: PLoS Biology 4, e368, 2006


  • Login