Sliding on DNA: From Peptides to Small Molecules

Area of Science:

• Biochemistry
• Molecular Biology
• Synthetic Chemistry

Background:

• One-dimensional (1D) diffusion along DNA is a key mechanism for DNA-binding proteins to find targets.
• Quantitative understanding and chemical tools for controlling 1D DNA diffusion are limited.
• Peptides capable of binding and sliding along DNA, termed molecular sleds, have been recently discovered.

Purpose of the Study:

• To investigate structure-function relationships of natural molecular sleds.
• To explore methods for controlling molecular sled sliding activity.
• To identify novel synthetic molecules with DNA sliding capabilities.

Main Methods:

• Chemical modification of peptides and analogs to test DNA binding and sliding.
• Synthesis and evaluation of small molecules for DNA sliding.
• Analysis of N-methylpyrrole/N-methylimidazole polyamides for molecular sled activity.

Main Results:

• Chemically modified peptides and synthetic small molecules exhibit DNA sliding activity.
• New strategies for controlling molecular sled activity were identified.
• N-methylpyrrole/N-methylimidazole polyamides demonstrate molecular sled behavior.

Conclusions:

• Synthetic small molecules can function as molecular sleds.
• Understanding DNA sliding mechanisms can be advanced through chemical modification and synthetic analogs.
• Molecular sleds offer potential for controlling DNA target recognition, especially for rare sites.