Autcatalytic networks

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Presentation transcript:

Autcatalytic networks Eörs Szathmáry Collegium Budapest AND Eötvös University

Units of evolution multiplication heredity variation hereditary traits affecting survival and/or reproduction

Towards Systems Chemistry Analysis of synthesis of coupled autocatalytic chemical systems Origin of life and chemical technology

The formose ‘reaction’ formaldehyde autocatalysis glycolaldehyde Butlerow, 1861

The reductive citric acid cycle

PEP carboxylase

The catalytic mechanism

Chemical evolution was a race between tar formation and life formation Chemical networks Tar Life What fraction of planets would end up with just tar?

Benner’s hypothetical ribo-organism (1999) Membrane? Cofactors?

Another case: von Kiedrowski’s replicators

Von Kiedrowski’s replicator

Peptide replicator networks

The Soi reaction

Toward ribozyme self-replication

Towards a general polymerase

Anabolic autocatalysis I

Anabolic autocatalysis II

Towards replicable nanostructures

Gánti’s chemoton model (1974) metabolism template copying membrane growth ALL THREE SUBSYSTEMS ARE AUTOCATALYTIC

Pathways of supersystem evolution metabolism M B boundary M T M B T template B T INFRABIOLOGICAL SYSTEMS

Szostak’s vesicles

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