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Based on the oligomer-world hypothesis we propose an abstract model where themolecular recognition among oligomers is described in the shape space. Theorigin of life in the oligomer world is regarded as the establishment of ametabolic cycle in a primitive cell. The cycle is sustained by the molecularrecognition. If an original cell acquires the ability of the replication ofoligomers, the relationship among oligomers changes due to the poor fidelity ofthe replication. This change leads to the diversification of metabolic cycles.The selection among diverse cycles is the basis of the evolution. Theevolvability is one of the essential characters of life. We demonstrate theorigin and diversification of the metabolic cycle by the computer simulation ofour model. Such a simulation is expected to be the simplified demonstration ofwhat actually occurred in the primordial soup. Our model describes an analogera preceding the digital era based on the genetic code.

Origin and diversification of a metabolic cycle in oligomer world