Cited by 66Genomics and Chromatin DynamicsChromatin Remodeling and CancerProtein Structure and Dynamics

Structural elements promote architectural stripe formation and facilitate ultra-long-range gene regulation at a human disease locus

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Chen, Liang-Fu, Long, Hannah Katherine, Park, Minhee, Swigut, Tomek, Boettiger, Alistair Nicol, Wysocka, Joanna·2023·Molecular Cell

Published version of a preprint

Abstract

Summary Enhancer clusters overlapping disease-associated mutations in Pierre Robin sequence (PRS) patients regulate SOX9 expression at genomic distances over 1.25 megabases. We applied optical reconstruction of chromatin architecture (ORCA) imaging to trace 3D locus topology during PRS-enhancer activation. While we observed pronounced changes in locus topology between cell-types, analysis of single chromatin fiber traces revealed that these ensemble-average differences arise not from the presence of cell-type unique conformations, but through changes in frequency of commonly sampled topologies. We further identified two CTCF-bound elements, internal to the SOX9 topologically associating domain, which are positioned near its 3D geometric center and bridge enhancer-promoter contacts in a series of chromatin loops. Ablation of these elements results in diminished SOX9 expression and altered domain-wide contacts. Polymer models with uniform loading across the domain and frequent cohesin collisions recapitulate this multiloop, centrally clustered geometry, suggesting a mechanism for gene regulation over ultralong ranges. Four short bullet points that convey the key message of the paper SOX9 domain topology dynamically changes during a developmental transition Structural elements promote TAD-wide interactions, stripe formation and transcription Structural elements are CTCF-dependent and situated centrally in the 3D TAD structure Polymer simulations of multi-loop model best recapitulate topological features

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  • The presence of so-called stripes or flames on Hi-C maps indicates that unidirectional extrusion from an enhancer is quite common.

    “The presence of so-called stripes or flames on Hi-C maps indicates that unidirectional extrusion from an enhancer is quite common [116,117,118].”

    From Enhancer Function in the 3D Genome (2023) · cites this paper as [118]

    In Results (“A multi-loop model better explains…”; page not provided), the paper says both targeted-loading and random-loading models produce stripes, so stripes do not establish extrusion from an enhancer. The Discussion favors random cohesin loading between loop barriers over the enhancer-loading reel-in model at the SOX9 locus; it does not present enhancer-origin extrusion as common. (LLM, conf=0.87)

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Cited by

Sorted by citations

Authors
Chen, L.-F., Long, H. K., Park, M., Swigut, T., Boettiger, A. N., & Wysocka, J.
Affiliations
  • Stanford Medicine (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
  • Boettiger, Alistair Nicol
  • Wysocka, Joanna
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2023-05
Volume
83
Issue
9
Pages
1446-1461.e6
ISSN
1097-2765 (ISSN-L)
OpenAlex
W4361283111
Cited by
66
References
16
Citations by year
2026: 12 · 2025: 20 · 2024: 23 · 2023: 11
FWCI
5.88
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, cc-by)
Funders
  • HHMI (R35 GM131757, U01 DK127419)
  • Damon Runyon Cancer Research Foundation
  • Wellcome Trust (106051/Z/14/Z)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chromatin Remodeling and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
Keywords
3D genome organization, SOX9, Pierre Robin sequence, enhancer clusters, topologically associating domains, chromatin looping, enhancer-promoter interactions, cohesin, polymer models
MeSH terms
CCCTC-Binding Factor, Chromatin, Enhancer Elements, Genetic, Gene Expression Regulation, Humans, Promoter Regions, Genetic, Regulatory Sequences, Nucleic Acid, Genome, Cell Cycle Proteins

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