Randomness and optimality in enhanced DNA ligation with crowding effects

Takaharu Y. Shiraki, Ken Ichiro Kamei, Yusuke T. Maeda

Research output: Contribution to journalArticlepeer-review


Enzymatic ligation is essential for the synthesis of long DNA. However, a number of ligated products exponentially decay as DNA synthesis proceeds randomly. The control of ligation randomness is important to suppress exponential decay and achieve efficient synthesis of long DNA. This study analyzes the randomness in sequential DNA ligations, termed quantitative polymerase chain reaction (qPCR)-based statistical analysis of randomness (qPCR-bSTAR), using a probability distribution of ligated DNA length. Exponential decay is suppressed in a polymer solution. Further, DNA ligation is found to be activated at optimal crowded conditions. The theoretical model of kinetic ligation suggests that intermolecular attraction due to molecular crowding is involved in the optimal balance of ligation speed and available ligase. Our findings indicate that crowding effects enhance the synthesis of long DNA with large amounts of genetic information retained.

Original languageEnglish (US)
Article number013360
JournalPhysical Review Research
Issue number1
StatePublished - Mar 2020

ASJC Scopus subject areas

  • General Physics and Astronomy


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