Site-specific binding of short peptides with DNA modulated eukaryotic endonuclease activity.

Mechanism / theoretical grounding — not clinical validation.

Khavinson VKh, Fedoreyeva LI, Vanyushin BF. Bull Exp Biol Med. 2011.

Organ: general-aging · Type: in-vitro · Peptides: short peptides

Short peptides of 2–4 residues were reported to inhibit or stimulate wheat endonuclease hydrolysis of λ phage DNA depending on methylation status — peptide–DNA biochemistry, not a clinical study.

Editorial summary of a 2011 original article in Bulletin of Experimental Biology and Medicine. Endonuclease hydrolysis of phage DNA in the presence of short peptides. The English abstract does not name individual sequences. Public pages cite PubMed only. Read the paper: PMID 22442805.

Methods

Short peptides (2–4 amino-acid residues) were tested on hydrolysis of λ phage DNA by eukaryotic endonucleases WEN1 and WEN2. The authors also examine peptide binding to single-stranded oligonucleotides containing NG- and CG-sites methylated in eukaryotes, and they note modulation by histone H1. Fluorescence spectrometry is indexed in MeSH. Peptide identities and concentrations are not listed in the English abstract.

Findings

This paper is mechanistic or modeling evidence, not a clinical trial. The authors report that the peptides inhibit or stimulate endonuclease hydrolysis depending on DNA methylation status, that they discriminate sequences and methylation, and that they change the set of hydrolyzed sites on double-stranded DNA. Effects differed by peptide primary structure and were modulated by histone H1. They interpret site-specific peptide–DNA contacts as a possible epigenetic control, including at early evolutionary stages.

Unnamed 2–4-residue peptides on phage DNA are not a gene-therapy or clinical result. Follow the PMID.