ArticleNucleic acids research2024
The transition state for coupled folding and binding of a disordered DNA binding domain resembles the unbound state.
Article in Nucleic acids research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Observation of hidden dynamics underlying facilitated dissociation of proteins from DNA.Chemical communications (Cambridge, England) · 2026Article
- Cooperative multivalency converts disorder into rods, resolving a paradox in cellular architecture.bioRxiv : the preprint server for biology · 2026Article
- Correlating Disordered Activation Domain Ensembles with Gene Expression Levels.bioRxiv : the preprint server for biology · 2024Article
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4 authors.
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Abstract
The basic zippers (bZIPs) are one of two large eukaryotic families of transcription factors whose DNA binding domains are disordered in isolation but fold into stable α-helices upon target DNA binding. Here, we systematically disrupt pre-existing helical propensity within the DNA binding region of the homodimeric bZIP domain of cAMP-response element binding protein (CREB) using Ala-Gly scanning and examine the impact on target binding kinetics. We find that the secondary structure of the transition state strongly resembles that of the unbound state. The residue closest to the dimerization domain is largely folded within both unbound and transition states; dimerization apparently propagates additional helical propensity into the basic region. The results are consistent with electrostatically-enhanced DNA binding, followed by rapid folding from the folded zipper outwards. Fly-casting theory suggests that protein disorder can accelerate binding. Interestingly however, we did not observe higher association rate constants for mutants with lower levels of residual structure in the unbound state.
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