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Related Concept Videos

Caspases01:24

Caspases

Caspase, a family of cysteine proteases, serve as effectors in apoptosis. The ced3 gene in C.elegans was first identified to be involved in apoptosis. This gene encodes the ced-3 caspase that is similar to the interleukin-1-beta converting enzyme or ICE in mammals. In addition to apoptosis, caspases also function in the inflammatory response. Inflammatory caspases are essential in activating pro-inflammatory cytokines that recruit immune cells and block the replication of pathogens inside cells.
ATP Driven Pumps III: V-type Pumps01:30

ATP Driven Pumps III: V-type Pumps

V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient.
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
Acute Pancreatitis II: Pathophysiology01:21

Acute Pancreatitis II: Pathophysiology

The pathophysiology of acute pancreatitis centers on injury to pancreatic acinar cells, which initiates a cascade of harmful intracellular events.This injury leads to premature activation of trypsinogen to trypsin in the pancreas. Trypsin then activates other digestive enzymes, such as chymotrypsin, elastase, and phospholipase A2, which begin breaking down pancreatic tissue. The resulting autodigestion causes local inflammation, tissue swelling, hemorrhage, and fat necrosis.Injured acinar cells...
Catalytically Perfect Enzymes01:07

Catalytically Perfect Enzymes

The theory of catalytically perfect enzymes was first proposed by W.J. Albery and J. R. Knowles in 1976. These enzymes catalyze biochemical reactions at high-speed. Their catalytic efficiency values range from 108-109 M-1s-1. These enzymes are also called 'diffusion-controlled' as the only rate-limiting step in the catalysis is that of the substrate diffusion into the active site. Examples include triose phosphate isomerase, fumarase, and superoxide dismutase.

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The Importance of Correct Protein Concentration for Kinetics and Affinity Determination in Structure-function Analysis
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Published on: March 17, 2010

Cathepsin E: a mini review.

Nousheen Zaidi1, Hubert Kalbacher

  • 1Medical and Natural Sciences Research Centre, University of Tübingen, Ob dem Himmelreich 7, 72074 Tuebingen, Germany.

Biochemical and Biophysical Research Communications
|January 8, 2008
PubMed
Summary
This summary is machine-generated.

Cathepsin E, an aspartic protease in immune cells, plays a key role in antigen processing for MHC class II presentation. This review highlights its distribution, localization, and regulation in physiological conditions.

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Area of Science:

  • Biochemistry
  • Immunology
  • Cell Biology

Background:

  • Cathepsin E is a significant intracellular aspartic protease.
  • It is primarily found in immune system cells.
  • It is involved in antigen processing through the MHC class II pathway.

Purpose of the Study:

  • To review the known features of Cathepsin E.
  • To highlight its tissue distribution and subcellular localization.
  • To discuss its enzymatic properties, intracellular trafficking, gene regulation, and associated physiological conditions.

Main Methods:

  • Literature review of existing studies on Cathepsin E.
  • Compilation of data on its biological characteristics.
  • Analysis of its role in immune system functions.

Main Results:

  • Cathepsin E exhibits specific tissue distribution and subcellular localization patterns.
  • Its enzymatic properties and intracellular transport mechanisms are crucial for its function.
  • Gene regulation and physiological conditions influence Cathepsin E activity.

Conclusions:

  • Cathepsin E is a critical enzyme in immune responses, particularly in antigen presentation.
  • Understanding its multifaceted characteristics is essential for comprehending immune cell function.
  • Further research into Cathepsin E regulation may offer insights into related physiological conditions.