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Caspases

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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...
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Reaction Mechanisms03:06

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Chemical reactions often occur in a stepwise fashion, involving two or more distinct reactions taking place in a sequence. A balanced equation indicates the reacting species and the product species, but it reveals no details about how the reaction occurs at the molecular level. The reaction mechanism (or reaction path) provides details regarding the precise, step-by-step process by which a reaction occurs.
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Mechanical Protein Functions01:58

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Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force. 
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Bacterial conjugation is a mechanism of horizontal gene transfer that enables the exchange of genetic material between bacterial cells through direct contact. This process is facilitated by a donor cell carrying a conjugative plasmid, which encodes genes necessary for pilus formation, DNA replication, and transfer. The conjugative plasmid plays a central role in initiating and executing the transfer of genetic material.The tra region of the conjugative plasmid encodes proteins responsible for...
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Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
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An Introduction to Mechanics01:28

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Humans have been making ships, shelters, pyramids, weapons, agricultural equipment, and many more items without recording the process or theory behind them for centuries. It would be challenging to document the evolution of mechanics from its origin to the present.
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Quantification of Immunostained Caspase-9 in Retinal Tissue
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A primer on caspase mechanisms.

Monica L Gonzalez Ramirez1, Guy S Salvesen1

  • 1Graduate Program in Biomedical Sciences, NCI-designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA.

Seminars in Cell & Developmental Biology
|January 14, 2018
PubMed
Summary
This summary is machine-generated.

This review compares mammalian caspases to other clan CD enzymes, highlighting their distinct roles in programmed cell death pathways like apoptosis and pyroptosis.

Keywords:
ApoptosisGasderminProteasePyroptosisRegulated cell death

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Background:

  • Caspases are proteolytic enzymes within the diverse CD clan, crucial for cell signaling.
  • These enzymes are unique to animals and regulate cell death through apoptosis and pyroptosis.

Purpose of the Study:

  • To elucidate mechanistic differences in activity and activation between mammalian caspases and other clan CD members.
  • To compare the roles of various caspase family members in programming inflammatory and anti-inflammatory cell death.

Main Methods:

  • Comparative analysis of caspase activity and activation mechanisms.
  • Review of literature on caspase family roles in cell death pathways.

Main Results:

  • Mammalian caspases exhibit distinct mechanisms compared to other clan CD enzymes.
  • Specific caspase family members differentially regulate pro-inflammatory and anti-inflammatory cell death.

Conclusions:

  • Understanding caspase diversity is key to deciphering complex cell signaling and death pathways.
  • Caspase research offers insights into inflammatory and anti-inflammatory processes.