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A Structural Analysis of DNA Binding by Myelin Transcription Factor 1 Double Zinc Fingers

Authors: Mitchell R. O’Connell; Marylène Vandevenne; Joel P. Mackay; Roland Gamsjaeger; Jacqueline M. Matthews; Ann H. Kwan; Nicholas E. Shepherd; +4 Authors

A Structural Analysis of DNA Binding by Myelin Transcription Factor 1 Double Zinc Fingers

Abstract

Myelin transcription factor 1 (MyT1/NZF2), a member of the neural zinc-finger (NZF) protein family, is a transcription factor that plays a central role in the developing central nervous system. It has also recently been shown that, in combination with two other transcription factors, the highly similar paralog MyT1L is able to direct the differentiation of murine and human stem cells into functional neurons. MyT1 contains seven zinc fingers (ZFs) that are highly conserved throughout the protein and throughout the NZF family. We recently presented a model for the interaction of the fifth ZF of MyT1 with a DNA sequence derived from the promoter of the retinoic acid receptor (RARE) gene. Here, we have used NMR spectroscopy, in combination with surface plasmon resonance and data-driven molecular docking, to delineate the mechanism of DNA binding for double ZF polypeptides derived from MyT1. Our data indicate that a two-ZF unit interacts with the major groove of the entire RARE motif and that both fingers bind in an identical manner and with overall two-fold rotational symmetry, consistent with the palindromic nature of the target DNA. Several key residues located in one of the irregular loops of the ZFs are utilized to achieve specific binding. Analysis of the human and mouse genomes based on our structural data reveals three putative MyT1 target genes involved in neuronal development.

Keywords

Models, Molecular, 060199 - Biochemistry and Cell Biology not elsewhere classified, 572, Protein Conformation, Receptors, Retinoic Acid, Neurogenesis, Molecular Sequence Data, Biochimie, biophysique & biologie moléculaire, Mice, Sequence Homology, Nucleic Acid, Animals, Humans, Amino Acid Sequence, Promoter Regions, Genetic, Nuclear Magnetic Resonance, Biomolecular, Neurons, Binding Sites, Base Sequence, Sequence Homology, Amino Acid, Plant Sciences, DNA, Life sciences, DNA-Binding Proteins, Sciences du vivant, Mutagenesis, Site-Directed, Biochemistry, biophysics & molecular biology, Protein Binding

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
20
Top 10%
Average
Top 10%
gold