Cited by 541Genomics and Chromatin DynamicsDiffusion and Search DynamicsDNA Repair Mechanisms

Self-organization of domain structures by DNA-loop-extruding enzymes

Open access
Alipour, E., Marko, J. F.·2012·Nucleic Acids Research

Abstract

The long chromosomal DNAs of cells are organized into loop domains much larger in size than individual DNA-binding enzymes, presenting the question of how formation of such structures is controlled. We present a model for generation of defined chromosomal loops, based on molecular machines consisting of two coupled and oppositely directed motile elements which extrude loops from the double helix along which they translocate, while excluding one another sterically. If these machines do not dissociate from DNA (infinite processivity), a disordered, exponential steady-state distribution of small loops is obtained. However, if dissociation and rebinding of the machines occurs at a finite rate (finite processivity), the steady state qualitatively changes to a highly ordered 'stacked' configuration with suppressed fluctuations, organizing a single large, stable loop domain anchored by several machines. The size of the resulting domain can be simply regulated by boundary elements, which halt the progress of the extrusion machines. Possible realizations of these types of molecular machines are discussed, with a major focus on structural maintenance of chromosome complexes and also with discussion of type I restriction enzymes. This mechanism could explain the geometrically uniform folding of eukaryote mitotic chromosomes, through extrusion of pre-programmed loops and concomitant chromosome compaction.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1093/nar/gks925

Cites

47 of 47 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

1 of the 48 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. [34]Pathria RK Beale PD Statistical Mechanics 1996 2nd edn Amsterdam Elsevier

Cited by

Sorted by citations

Authors
Alipour, E., & Marko, J. F.
Affiliations
  • UConn Health (US)
  • Northwestern University (US)
Corresponding author
  • Alipour, E.
  • Marko, J. F.
Venue
Nucleic Acids Research
Published
2012-10-15
Volume
40
Issue
22
Pages
11202-11212
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2100148696
Cited by
540
References
48
Citations by year
2026: 26 · 2025: 45 · 2024: 44 · 2023: 46 · 2022: 38 · 2021: 55 · 2020: 71 · 2019: 61 · 2018: 54 · 2017: 52 · 2016: 27 · 2015: 10 · 2014: 7 · 2013: 3
FWCI
2.56
Type
journal article
Language
en
Open access
Locations
  • Nucleic Acids Research (publishedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • HighWire Press Open Archive (submittedVersion)
Funders
  • National Science Foundation (1206868, 1022117, 0715099)
  • National Institutes of Health (MCB-1022117, DMR-1206868)
  • National Cancer Institute (U54CA143869)
  • Division of Materials Research (DMR-1206868)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Diffusion and Search Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
Keywords
DNA loop extrusion, self-organization, molecular machines, DNA translocation, processivity, loop size distribution, chromosome compaction, type I restriction enzymes, boundary elements
MeSH terms
Chromosomes, Computer Simulation, DNA, Enzymes, Models, Genetic, Nucleic Acid Conformation

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 ›

Are you an author, or do you see a problem with this page? Request a review