Premoidal simple analog to DNA from an organic compound known as a thioester
N. Sangvi
Jun. 13, 2009

Scientists have created a new analog DNA that is simple and can mimic the early stage DNA in the primordial world. The chemical system could answer questions about how life has emerged.

Interestingly, the new analog to DNA assembles and disassembles itself without the need for enzymes.

According to some computational biology think tanks, before the emergence of DNA, the earliest forms of life used RNA to transmit genetic codes.

The resulting new DNA analog involves two main component types. The backbone units are peptides linked in a set pattern with the amino acid cysteine exposed and available to react.

These peptides interact with the same nucleobases found in DNA, but each nucleobase is bound to an organic compound known as a thioester. Thioester bonds reversibly with the cysteine on the peptides to form thioester peptide nucleic acid (tPNA). This allows the nucleobases to attach and disassemble on their own without enzymes, so that a given peptide strand will hold a shifting array of nucleobases.

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N. Sangvi
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