Cited by 115Genomics and Chromatin DynamicsNuclear Structure and FunctionChromatin Remodeling and Cancer

Spatiotemporal coordination of transcription preinitiation complex assembly in live cells

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Nguyen, Vu Q., Ranjan, Anand, Liu, Sheng, Tang, Xiaona, Ling, Yick Hin, Wisniewski, Jan, Mizuguchi, Gaku, Li, Kai Yu +5 more·2021·Molecular Cell

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Abstract

Transcription initiation by RNA polymerase II (RNA Pol II) requires preinitiation complex (PIC) assembly at gene promoters. In the dynamic nucleus, where thousands of promoters are broadly distributed in chromatin, it is unclear how multiple individual components converge on any target to establish the PIC. Here we use live-cell, single-molecule tracking in S. cerevisiae to visualize constrained exploration of the nucleoplasm by PIC components and Mediator's key role in guiding this process. On chromatin, TFIID/TATA-binding protein (TBP), Mediator, and RNA Pol II instruct assembly of a short-lived PIC, which occurs infrequently but efficiently within a few seconds on average. Moreover, PIC exclusion by nucleosome encroachment underscores regulated promoter accessibility by chromatin remodeling. Thus, coordinated nuclear exploration and recruitment to accessible targets underlies dynamic PIC establishment in yeast. Our study provides a global spatiotemporal model for transcription initiation in live cells.

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  • Molecular processes that transmit regulatory information from enhancers to promoters, and those associated with promoter operation itself, are stochastic and dynamic.

    “Molecular processes that are thought to transmit regulatory information from enhancers to promoters (such as recruitment of transcription factors and coactivators, assembly of the Mediator complex40), as well as those that are associated with promoter operation itself (such as pre-initiation complex assembly, RNA polymerase II pausing and release41,42) are also stochastic and dynamic43.”

    From Nonlinear control of transcription through enhancer–promoter interactions (2022) · cites this paper as [41]

    The Results section, “Highly dynamic target search and low promoter occupancy by PIC components” (page unavailable), reports dynamic target search and infrequent PIC formation at yeast promoters. This supports the claim about dynamic promoter-associated PIC assembly, but the cited passages do not establish that enhancer-to-promoter signaling or RNA polymerase II pausing and release are stochastic and dynamic. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Regulatory processes at the interface between enhancers and promoters have been estimated to occur in the order of tens of seconds.

    “Regulatory processes at the interface between enhancers and promoters have been estimated to occur in the order of tens of seconds41,43,46, consistent with the condition that intermediate regulatory steps should be faster than bursting kinetics (Fig. 3f).”

    From Nonlinear control of transcription through enhancer–promoter interactions (2022) · cites this paper as [41]

    The Results section, “Highly dynamic target search and low promoter occupancy by PIC components” (page not provided), estimates 8–48 seconds for Mediator and general transcription factors to search for targets in yeast. That supports the timescale, but the measured process is target search, not specifically a regulatory step at the enhancer–promoter interface. (LLM, conf=0.84)

    Experimental — accuracy not yet measured

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Authors
Nguyen, V. Q., Ranjan, A., Liu, S., Tang, X., Ling, Y. H., Wisniewski, J., Mizuguchi, G., Li, K. Y., Jou, V., Zheng, Q., Lavis, L. D., Lionnet, T., & Wu, C.
Affiliations
  • Johns Hopkins University (US)
  • Howard Hughes Medical Institute (US)
  • NYU Langone Health (US)
Corresponding author
Wu, Carl
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2021-09
Volume
81
Issue
17
Pages
3560-3575.e6
ISSN
1097-2765 (ISSN-L)
OpenAlex
W3189598002
Cited by
115
References
6
Citations by year
2026: 10 · 2025: 26 · 2024: 32 · 2023: 15 · 2022: 19 · 2021: 13
FWCI
6.20
Type
journal article
Language
en
Open access
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  • Molecular Cell (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institutes of Health (GM132290-01, JF552/646)
  • Damon Runyon Cancer Research Foundation
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nuclear Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chromatin Remodeling and Cancer
Keywords
RNA polymerase II, Mediator complex, TFIID, TATA-binding protein, promoter accessibility, chromatin remodeling, spatiotemporal coordination, single-molecule tracking, live-cell imaging, Saccharomyces cerevisiae
MeSH terms
Chromatin, Nucleosomes, Promoter Regions, Genetic, Protein Binding, RNA Polymerase II, Saccharomyces cerevisiae, Transcription, Genetic, Saccharomyces cerevisiae Proteins, TATA-Box Binding Protein, Transcription Factor TFIID, Chromatin Assembly and Disassembly, Mediator Complex, Transcription Initiation, Genetic, Spatio-Temporal Analysis

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

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