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Related Concept Videos

Spindle Assembly02:50

Spindle Assembly

Spindle assembly occurs through three, often coexisting, pathways – the centrosome-mediated pathway, the chromatin-mediated pathway, and the microtubule-mediated pathway – collectively contributing to form a robust spindle apparatus.
In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a microtubule array...
Spindle Assembly02:50

Spindle Assembly

Spindle assembly occurs through three, often coexisting, pathways – the centrosome-mediated pathway, the chromatin-mediated pathway, and the microtubule-mediated pathway – collectively contributing to form a robust spindle apparatus.
In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a microtubule array...
Protein Complex Assembly02:41

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Protein Complex Assembly02:41

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Assembly of Cytoskeletal Filaments01:18

Assembly of Cytoskeletal Filaments

Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...
Assembly of Complex Microtubule Structures01:32

Assembly of Complex Microtubule Structures

Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.

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Related Experiment Video

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Simulation of a Scaled Assembly Process with Collaboration of a Robotic Arm and Monitoring through a Vision System for Quality Control
05:47

Simulation of a Scaled Assembly Process with Collaboration of a Robotic Arm and Monitoring through a Vision System for Quality Control

Published on: August 29, 2025

Assembling the pieces.

Dennis J Thiele1, Jonathan D Gitlin

  • 1Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Research Drive, LSRC C351, Durham, North Carolina 27710, USA. dennis.thiele@duke.edu

Nature Chemical Biology
|February 19, 2008
PubMed
Summary
This summary is machine-generated.

Transition metals are vital for protein function, with known pathways for their transport in organisms. The challenge is to create a unified view of metal roles in biological systems and ecosystems.

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Area of Science:

  • Biochemistry
  • Metallomics
  • Systems Biology

Background:

  • Transition metals are essential cofactors for numerous proteins, facilitating critical biological processes like electron exchange, substrate binding, and structural stabilization.
  • Extensive research has elucidated the molecular mechanisms governing metal ion homeostasis, including uptake, intracellular trafficking, and excretion, in both human diseases and model organisms.

Purpose of the Study:

  • To address the challenge of integrating detailed molecular knowledge of metal metabolism into a comprehensive, systems-level understanding.
  • To bridge the gap between cellular/organismal metal handling and their broader roles within ecosystems.

Main Methods:

  • Review and synthesis of existing literature on metal biology and biochemistry.
  • Conceptual framework development for systems-level metal analysis.
  • Integration of data from human disease studies and model organisms.

Main Results:

  • Identification of key molecular players in metal homeostasis.
  • Recognition of the need for a holistic approach to metal biology.
  • Highlighting the complexity of metal speciation and localization within biological systems.

Conclusions:

  • A systematic, integrated view of metal content, speciation, localization, and utilization is crucial.
  • Understanding metal roles requires considering both organismal and ecosystem levels.
  • Future research should focus on developing models that encompass these integrated aspects.