PreprintCited by 455Nuclear Structure and FunctionRNA and protein synthesis mechanismsGenomics and Chromatin Dynamics

The nucleolus

Open access
Pederson, T.·2011·Cold Spring Harbor Perspectives in Biology

Abstract

When cells are observed by phase contrast microscopy, nucleoli are among the most conspicuous structures. The nucleolus was formally described between 1835 and 1839, but it was another century before it was discovered to be associated with a specific chromosomal locus, thus defining it as a cytogenetic entity. Nucleoli were first isolated in the 1950s, from starfish oocytes. Then, in the early 1960s, a boomlet of studies led to one of the epochal discoveries in the modern era of genetics and cell biology: that the nucleolus is the site of ribosomal RNA synthesis and nascent ribosome assembly. This epistemologically repositioned the nucleolus as not merely an aspect of nuclear anatomy but rather as a cytological manifestation of gene action-a major heuristic advance. Indeed, the finding that the nucleolus is the seat of ribosome production constitutes one of the most vivid confluences of form and function in the history of cell biology. This account presents the nucleolus in both historical and contemporary perspectives. The modern era has brought the unanticipated discovery that the nucleolus is plurifunctional, constituting a paradigm shift.

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  • Multiplexed immunofluorescence and FISH can visualize whether the entire nucleolar assembly line is expanding or a specific sub-compartment is bottlenecked.

    “By simultaneously tagging Pol I (initiation), fibrillarin (processing in the DFC), and nucleophosmin (assembly in the GC), researchers can visualize whether the entire nucleolar assembly line is expanding or if a specific sub-compartment is bottlenecked [79,80].”

    From Ribosome Biogenesis as a Putative Bottleneck to Skeletal Muscle Hypertrophy: Mechanisms, Human Evidence, and Practical Modulators (2026) · cites this paper as [79]

    In “A QUADRIPARTITE NUCLEOLUS, OR MORE?” (page unavailable), the paper reports dual-color in situ hybridization that revealed distinct RNA distributions within the granular component. It also identifies fibrillarin as an rRNA-modifying enzyme in the dense fibrillar component. Our copy does not describe simultaneous Pol I, fibrillarin, and nucleophosmin tagging or establish that such imaging can distinguish overall expansion from a sub-compartment bottleneck. (LLM, conf=0.83)

    Experimental — accuracy not yet measured
  • Rigorous optimization for human muscle tissue autofluorescence mitigation and the high technological barrier of super-resolution platforms create significant infrastructural limitations, leaving the literature fragmented.

    “However, the rigorous optimization required for human muscle tissue autofluorescence mitigation, combined with the high technological barrier of super-resolution platforms, creates significant infrastructural limitations, leaving the literature fragmented [78,79].”

    From Ribosome Biogenesis as a Putative Bottleneck to Skeletal Muscle Hypertrophy: Mechanisms, Human Evidence, and Practical Modulators (2026) · cites this paper as [79]

    The passages in “The Nucleolus Is Neither as Static nor as Compact as First Thought” discuss fluorescence methods for studying nucleolar proteins, not autofluorescence mitigation in human muscle tissue. A search for super-resolution platforms and technological barriers likewise found no passage addressing infrastructural limitations or a fragmented literature. Page numbers are unavailable in our copy. (LLM, conf=0.78)

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Research works printed but not linked: 3

  1. Harris H. 1974. Nucleus and Cytoplasm 3rd edition. Claren- don Press, Oxford.
  2. Lewin B. 1980. Gene Expression. Volume 2. Eukaryotic Chro- mosomes. 2nd edition. John Wiley & Sons, New York.
  3. Vincent WS, Miller OL. 1966. International symposium on the nucleolus. Its structure and function. Montevideo, Uruguay. J Natl Cancer Inst Monogr 23: 1-610.

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Authors
Pederson, T.
Affiliations
University of Massachusetts Chan Medical School (US)
Corresponding author
Pederson, T.
Venue
Cold Spring Harbor Perspectives in Biology
Published
2010-11-24
Volume
3
Issue
3
Pages
a000638-a000638
ISSN
1943-0264 (ISSN-L)
OpenAlex
W4231439871
Cited by
455
References
114
Citations by year
2026: 36 · 2025: 43 · 2024: 50 · 2023: 45 · 2022: 38 · 2021: 46 · 2020: 33 · 2019: 36 · 2018: 18 · 2017: 17 · 2016: 33 · 2015: 15 · 2014: 16 · 2013: 18 · 2012: 7
Type
posted content
Language
en
Open access
Locations
  • Cold Spring Harbor Perspectives in Biology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation (0445841)
  • National Institutes of Health (5r01gm021595-25)
  • National Institute of General Medical Sciences (R01GM060551, R01 GM-60551, R01 GM-21595)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nuclear Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
nucleolus, history of cell biology, ribosomal RNA synthesis, ribosome assembly
MeSH terms
Cell Cycle, Cell Nucleolus, Cell Biology, RNA, Messenger, RNA, Ribosomal, Virus Replication, Signal Recognition Particle, History, 20th Century, History, 21st Century

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