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Capturing Chromosome Conformation Across Length Scales

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Published on: January 20, 2023

Probe optimization for sequencing by ligation.

Dan Pu¹, Jing Chen¹, Xiaoting Qian¹

¹State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.

Journal of Biochemistry

|December 25, 2014

Summary

This summary is machine-generated.

Optimizing DNA probes for sequencing by ligation (SBL) enhances accuracy. Double-labelled probes and specific lengths improve fluorescence, while deoxyinosine placement impacts ligation efficiency.

Keywords:

deoxyinosine double-labelled fluorescent probe high-throughput sequencing optimization probe optimization sequencing by ligation (SBL)

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Highly Efficient Ligation of Small RNA Molecules for MicroRNA Quantitation by High-Throughput Sequencing

Highly Efficient Ligation of Small RNA Molecules for MicroRNA Quantitation by High-Throughput Sequencing

Published on: November 18, 2014

Area of Science:

Molecular Biology
Biochemistry
Genomics

Background:

Sequencing by ligation (SBL) is a key enzymatic DNA sequencing method.
Probe ligation efficiency and specificity are critical for SBL success.

Purpose of the Study:

To optimize DNA probe design for enhanced ligation efficiency and specificity in SBL.
Investigate the impact of dye labeling, probe length, and composition on SBL performance.

Main Methods:

Evaluated double- and single-labelled fluorescent probes.
Designed and tested probes of varying lengths (7- to 9-mers) with controlled Tm differences.
Assessed the effect of deoxyinosine incorporation at probe termini.

Main Results:

Double-labelled probes significantly increased fluorescence intensity and reduced background noise compared to single-labelled probes.
Contrary to expectations, 8-mer probes with larger Tm differences yielded stronger fluorescence.
5'-deoxyinosine probes potentially decreased ligation efficiency, while 3'-deoxyinosines reduced fluorescence and ligation, challenging existing theories.

Conclusions:

Optimized probe design, including dual labeling and specific length/composition, can significantly improve SBL efficiency and accuracy.
Findings provide new insights into probe structure-function relationships in enzymatic DNA sequencing.