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Related Concept Videos

Complement System01:27

Complement System

The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a membrane...
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
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Regulation of Hematopoietic Stem Cells01:01

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All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
Role of Hematopoietic Growth Factors01:28

Role of Hematopoietic Growth Factors

Hematopoietic growth factors are molecules that regulate the differentiation rate of hematopoietic stem cells (HSCs). Erythropoietin (EPO), primarily produced by the kidneys, plays a crucial role in erythrocyte production. When oxygen levels in the blood are low, EPO is released into the bloodstream, reaching the bone marrow, where it stimulates HSCs to differentiate and mature into erythrocytes, which are vital for oxygen transport.
Thrombopoietin (TPO), mainly released by the liver,...
Homologous Recombination02:31

Homologous Recombination

The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
Antimicrobial Proteins01:23

Antimicrobial Proteins

Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...

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High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment
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Complement factor H related proteins (CFHRs).

Christine Skerka1, Qian Chen, Veronique Fremeaux-Bacchi

  • 1Department of Infection Biology, Leibniz Institute for Natural Product Research and Infection Biology, Jena, Germany. christine.skerka@hki-jena.de

Molecular Immunology
|July 9, 2013
PubMed
Summary
This summary is machine-generated.

Factor H related proteins (CFHRs) bind C3b and are implicated in diseases like aHUS and C3 glomerulopathies. Understanding CFHR gene variations and protein interactions is crucial for diagnosing and treating complement-associated kidney diseases.

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Area of Science:

  • Immunology
  • Genetics
  • Nephrology

Background:

  • Factor H related proteins (CFHR1-5) are plasma proteins that bind C3b.
  • Genetic variations in CFHR genes are linked to diseases such as atypical hemolytic uremic syndrome (aHUS) and C3 glomerulopathies (C3GN, DDD, CFHR5 nephropathy).
  • The exact roles of individual CFHR proteins in complement regulation and disease pathogenesis remain incompletely understood.

Purpose of the Study:

  • To review current knowledge on CFHR genes and proteins.
  • To elucidate the function of CFHR proteins in complement activation.
  • To understand the contribution of CFHR proteins to complement-associated diseases.

Main Methods:

  • Literature review of recent publications on CFHR genes and proteins.
  • Analysis of genetic abnormalities within the CFHR gene locus.
  • Investigation of CFHR protein homo- and heterodimerization.

Main Results:

  • CFHR proteins are involved in complement regulation through C3b binding.
  • Genetic abnormalities can lead to hybrid CFHR proteins with impaired functions.
  • CFHR protein interactions, including dimerization, are critical for their function.

Conclusions:

  • CFHR proteins play a significant role in complement system regulation.
  • Dysfunctional CFHR proteins, arising from genetic alterations, contribute to various kidney diseases.
  • Further research into CFHR proteins is essential for understanding complement-mediated pathologies.