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Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
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Nuclear protein sorting is the selective trafficking of histones, polymerases, gene regulatory proteins into the nucleus and exporting RNAs and ribosomes to the cytosol. It is a tightly controlled process that regulates gene expression within a cell.
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A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker...
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Nuclear Structure, Size Regulation, and Role in Cell Migration.

Yuhao Li1,2, Shanghao Ge2, Jiayi Liu2

  • 1State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China.

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This review details the nucleus

Keywords:
cellular functionsmechanical functionnuclear componentsnuclear sizenucleus

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • The nucleus is a central organelle regulating cellular functions like DNA replication and transcription.
  • Nuclear morphology, structure, and organization are critical for cellular activity.
  • Deviations in these nuclear parameters can significantly impact cell function and health.

Purpose of the Study:

  • To provide an updated perspective on nuclear structure and function.
  • To highlight the role of the nucleus in sensing mechanical stress.
  • To discuss the implications of altered nuclear morphology in diseases, particularly cancer.

Main Methods:

  • Review of current literature on nuclear components and their functions.
  • Analysis of mechanisms regulating nuclear size determination.
  • Exploration of the nucleus's role as a mechanical sensor.

Main Results:

  • The linker of nucleoskeleton and cytoskeleton complex, nuclear envelope, nuclear lamina, and chromatin are key nuclear components.
  • Nuclear size is a fundamental cellular parameter linked to environmental changes, development, and disease.
  • The nucleus acts as a mechanical sensor, and altered morphology impacts diseased cell physiology.

Conclusions:

  • Understanding nuclear structure, function, and size regulation is crucial for comprehending cellular health and disease.
  • The nucleus's mechanical sensing role and the consequences of its altered morphology are areas of active research.
  • This review synthesizes current knowledge on nuclear components and their relation to cellular state and disease.