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DTSTART:20260329T030000
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DTSTAMP:20260416T051644Z
UID:1765794600@ist.ac.at
DTSTART:20251215T113000
DTEND:20251215T123000
DESCRIPTION:Speaker: Christa Schleper\nhosted by Andela Saric / Michl Sixt\
 nAbstract: The question about the emergence of complex life forms on Earth
  remains one of the big mysteries in evolution. For about 2 billion years\
 , only microorganisms of the domains Bacteria and Archaea were inhabitants
  on our planet until the first complex\, eukaryotic cells evolved. Current
  models converge on a symbiosis or a merger\, between a bacterium and an a
 rchaeon which about 1.8 billion years ago led to the formation of the firs
 t complex cell with organelles.This hypothesis is fuelled by the recent di
 scovery of Asgard Archaea.Genomic studies of these archaea and the cultiva
 tion of living strains in a Japanese and in our laboratory shed light on t
 he closest known prokaryotic relatives of eukaryotes. They reveal unexpect
 ed cellular complexities\, as e.g. cell bodies from which extensive protru
 sions emerge that are filled with actin filaments. Our recent studies on L
 okiarchaeum ossiferum reveal more surprises\, like cellular plasticity and
  movements that were previously thought to only occur in eukaryotes.The fi
 ndings support that an Asgard archaeon was likely the host for the (alpha-
 )proteobacterial endosymbiont in this crucial event of early evolution tha
 t gave rise to all complex life forms.
LOCATION:Raiffeisen Lecture Hall\, ISTA
ORGANIZER:diana.gruber@ista.ac.at
SUMMARY:Christa Schleper: Meet your Prokaryotic Ancestor: On the Role of As
 gard Archaea in the Evolution of Eukaryotes
URL:https://talks-calendar.ista.ac.at/events/5886
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