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Related Concept Videos

Types of Intermediate Filaments01:31

Types of Intermediate Filaments

The intermediate filaments are an essential component of the cytoskeleton. Presently six types of intermediate filament have been identified. Type I and II are acidic and basic keratin proteins. Type III is of mesodermal origin and comprises four proteins: vimentin, desmin, glial fibrillary acidic protein (GFAP), and peripherin. Vimentin is commonly found in mesenchymal cells, desmin in muscle cells, GFAP in astrocytes, while peripherin is found in peripheral nervous system neurons (PNS). Type...
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Globular and Fibrous Proteins

Many proteins can be classified into two distinct subtypes - globular or fibrous. These two types differ in their shapes and solubilities.
Globular proteins are also known as spheroproteins and typically are approximately round in shape. They contain a mix of amino acid types and contain differing sequences in their primary structures. Globular proteins have many different functions, such as enzymes, cellular messengers, and molecular transporters. These roles often require the proteins to be...
Fibril-associated Collagen01:11

Fibril-associated Collagen

Fibril-associated collagens are a type of collagens present in the extracellular matrix with interrupted triple helices or FACIT (Fibril-associated collagens interrupted triple-helices). FACIT help connect and attach the collagen fibrils with each other as well as with other proteins of the extracellular matrix.
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The Structure of Intermediate Filaments01:19

The Structure of Intermediate Filaments

The intermediate filaments are one of three widely studied cytoskeletal filaments. They are so named as their diameter (10 nm) is in between that of microfilaments (7 nm) and the microtubules (25 nm).  These filaments are highly stable and can remain intact when exposed to high salt concentrations and detergents. These filaments are responsible for providing stability and mechanical support to the cells. They also help in cell adhesion and maintaining tissue integrity.
Intermediate filaments...
The Early Endosome: Endocytosis of Transferrin01:28

The Early Endosome: Endocytosis of Transferrin

Essential proteins such as insulin or low-density lipoprotein (LDL) and micronutrients such as iron enter a eukaryotic cell through receptor-mediated endocytosis. Subsequently, the early endosomes fuse with the vesicles containing such receptor-ligand complexes and play a vital role in sorting the incoming ligands and receptors. While the ligands are either degraded inside the vesicle or released into the cytosol, their receptors are returned to the plasma membrane for further rounds of...
Fibrous Proteins00:55

Fibrous Proteins

Fibrous proteins are either long and narrow proteins or assemble to form long and thin structures. They contain repetitive units and usually consist of either alpha helices or beta sheets and, in rare cases, a mix of both. The amino acids in the primary structure often consist of repeating amino acid sequences. The role of fibrous proteins is primarily structural. Many are located in the extracellular matrix and are present in connective tissues to impart strength and joint mobility. They are...

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Ferritinophagy: Assessing the Selective Degradation of Iron by Autophagy in Human Fibroblasts
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Insect ferritins: Typical or atypical?

Daphne Q D Pham1, Joy J Winzerling

  • 1Department of Biological Sciences, University of Wisconsin-Parkside, Kenosha, WI 531412000, USA.

Biochimica Et Biophysica Acta
|March 17, 2010
PubMed
Summary
This summary is machine-generated.

Insect iron metabolism differs significantly from mammals, offering potential targets for pest control. Understanding these unique insect ferritin structures and functions can lead to safer, more effective insect management strategies.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Entomology

Background:

  • Insect-borne diseases and agricultural pests pose significant global health and economic challenges.
  • Current pest control methods risk non-target effects, necessitating insect-specific control strategies.
  • Evolutionary divergence between insect and vertebrate cells suggests unique targets, particularly in iron metabolism.

Purpose of the Study:

  • To review and highlight the key differences in iron metabolism between insects and vertebrates.
  • To explore the potential of these differences for developing novel insect control methods.
  • To provide a comparative analysis of insect and mammalian ferritin structure and function.

Main Methods:

  • Comparative analysis of scientific literature on insect and mammalian iron metabolism.
  • Review of studies detailing ferritin structure, mass, glycosylation, and cellular localization.
  • Examination of functional differences in iron transport versus storage.

Main Results:

  • Insect ferritins are heavier, often glycosylated, and synthesized with signal peptides, unlike mammalian ferritins.
  • Insect ferritin exhibits tetrahedral symmetry (12+12 subunits), contrasting with mammalian ferritin's octahedral symmetry (24+24 subunits).
  • Insect ferritins function primarily as iron transporters within the vacuolar system, whereas mammalian ferritins are cytoplasmic iron storage proteins.

Conclusions:

  • Significant structural and functional disparities exist in iron metabolism, specifically in ferritins, between insects and mammals.
  • These insect-specific traits present promising avenues for developing targeted and safer insect control agents.
  • Further research into insect iron metabolism could revolutionize pest and disease vector management.