Keijzer JF, Albada B. Site-Specific and Trigger-Activated Modification of Proteins by Means of Catalytic Hemin/G-quadruplex DNAzyme Nanostructures.
Bioconjug Chem 2020;
31:2283-2287. [PMID:
32909740 PMCID:
PMC7581286 DOI:
10.1021/acs.bioconjchem.0c00422]
[Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
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Catalytic
nanostructures have the potency to mimic enzymatic features.
In this paper, we show that the complex between hemin and G-quadruplex
DNA efficiently catalyzes the modification of proteins with N-methyl luminol derivatives. Final conversions are reached
within 15–30 min, and LC-MS analysis of tryptic digests of
the proteins shows that the reaction proceeds with chemoselectivity
for electron-rich aromatic residues (Tyr ≫ Trp), and the site-specificity
of the modification depends on the sequence and secondary structure
folding of the G-quadruplex nanostructure. Furthermore, the modification
can be applied on proteins with different biomedical functions, and
the nanostructure can be designed to contain a regulatory element
in order to regulate protein modification by an external stimulus.
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