2012
DOI: 10.1016/j.jmb.2011.12.043
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N-Terminal Segments Modulate the α-Helical Propensities of the Intrinsically Disordered Basic Regions of bZIP Proteins

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Cited by 59 publications
(64 citation statements)
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References 62 publications
(100 reference statements)
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“…This is supported by experiments showing that the N-terminal domain of HY5 undergoes a-helical folding induced by TFE (Yoon et al, 2006), and this potential MoRF overlaps with the region in HY5 (residues from 25 to 60) that binds to COP1 (Hardtke et al, 2000). Potential MoRFs have also been suggested to exist in the basic regions of 15 different bZIPs (Das et al, 2012). Since one of the major functional advantages of IDPs is their ability to interact specifically with multiple molecular targets, it is not surprising that intrinsically disordered TFs are prime candidates for being the crucial hub proteins or building blocks upon which flexible networks have evolved to exert fine-tuned transcriptional control over signaling pathways, through specific binding-induced folding of various MoRFs in the TRDs ( Figure 2B).…”
Section: Bzip Familymentioning
confidence: 80%
See 1 more Smart Citation
“…This is supported by experiments showing that the N-terminal domain of HY5 undergoes a-helical folding induced by TFE (Yoon et al, 2006), and this potential MoRF overlaps with the region in HY5 (residues from 25 to 60) that binds to COP1 (Hardtke et al, 2000). Potential MoRFs have also been suggested to exist in the basic regions of 15 different bZIPs (Das et al, 2012). Since one of the major functional advantages of IDPs is their ability to interact specifically with multiple molecular targets, it is not surprising that intrinsically disordered TFs are prime candidates for being the crucial hub proteins or building blocks upon which flexible networks have evolved to exert fine-tuned transcriptional control over signaling pathways, through specific binding-induced folding of various MoRFs in the TRDs ( Figure 2B).…”
Section: Bzip Familymentioning
confidence: 80%
“…A study of conformational ensembles for 15 different bZIPs proposed that the basic regions of the bZIPs have quantifiable preferences for a-helical conformations in their unbound monomeric forms and this helicity varies from one basic region to another despite significant sequence similarity of the bZIP domains. Intramolecular interactions between basic regions and an eight-residue segment directly N-terminal to the basic regions are the primary modulators of helicity in the basic regions (Das et al, 2012). The bZIP HY5 from Arabidopsis positively regulates plant photomorphogenesis through light-dependent regulation of transcription from promoters that contain a G-box, one of several lightresponsive elements.…”
Section: Bzip Familymentioning
confidence: 99%
“…To be able to answer these types of questions, we present a framework for sequence-ensemble relationships of polyampholytic IDPs that is based on results from atomistic Metropolis Monte Carlo simulations. We use the ABSINTH (self-assembly of biomolecules studied by an implicit, novel, and tunable Hamiltonian) implicit solvation model and force field paradigm (17), a combination that has yielded verifiably accurate results for other IDPs (7,18). We introduce a patterning parameter κ to distinguish between different sequence variants based on the linear sequence distributions of oppositely charged residues.…”
mentioning
confidence: 99%
“…DNA is shown in a form of a cartoon in atomic colours in all three panels proximal region of bZIP factors contains a canonical basic region involved in DNA binding and nuclear import, while the distal part of bZIP factors carries a leucine dimerisation motif which is known as a leucine zipper. Experimental evidence suggests that the basic regions of bZIP TFs (bZIP-bRs) are necessary and sufficient for DNA binding and specificity (Das et al 2012). Further, it has been suggested through bioinformatic predictions and spectroscopic studies of bZIP-bRs that unbound monomeric bZIP-bRs were uniformly disordered as isolated domains (Das et al 2012).…”
Section: Basic Leucine Zipper Transcription Factorsmentioning
confidence: 99%
“…Experimental evidence suggests that the basic regions of bZIP TFs (bZIP-bRs) are necessary and sufficient for DNA binding and specificity (Das et al 2012). Further, it has been suggested through bioinformatic predictions and spectroscopic studies of bZIP-bRs that unbound monomeric bZIP-bRs were uniformly disordered as isolated domains (Das et al 2012). The bZIP factors bind DNA as dimers, formed by the interaction of two α-helical stretches, consisting of seven amino acid residues per DNA turn (Fig.…”
Section: Basic Leucine Zipper Transcription Factorsmentioning
confidence: 99%