integrin
Microbiology
Physiology
Examples of integrin in the following topics:
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Hemidesmosomes
- An example configuration of a hemidesmosome might consist of cytosolic keratin, non-covalently bonded to a cytosolic plectin plaque, which is bonded to a single-pass transmembrane adhesion molecule such as the α6β4 integrin.
- The integrin might then attach to one of many multi-adhesive proteins such as laminin, resident within the extracellular matrix, thereby forming one of many potential adhesions between cell and matrix.
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HIV Attachment and Host Cell Entry
- The HIV coat protein, gp120, binds to integrin α4β7, activating LFA-1 (the central integrin involved in the establishment of bridges known as "virological synapses") which facilitate efficient cell-to-cell spreading of HIV-1.
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Planctomycetes
- One such example is a gene sequence (in Gemmata obscuriglobus) that was found to have significant homology to the integrin alpha-V, a protein that is important in transmembrane signal transduction in eukaryotes.
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Basement Membranes and Diseases
- It is caused by a mutation in the integrin α6β4 cell-adhesion molecule on either the alpha or beta subunit.
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Double-Stranded DNA Viruses: Adenoviruses
- Next, a specialized motif in the penton base protein interacts with αv integrin, stimulating internalization of the adenovirus via clathrin-coated pits, resulting in entry of the virion into the host cell within an endosome.
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Development of the Immune System
- This is due to lower opsonic activity, as well as diminished up-regulation of integrin and selectin receptors, which limit the ability of neutrophils to interact with adhesion molecules in the endothelium.
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Fluid Mosaic Model
- Integral proteins (some specialized types are called integrins) are, as their name suggests, integrated completely into the membrane structure, and their hydrophobic membrane-spanning regions interact with the hydrophobic region of the the phospholipid bilayer .
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Inflammation
- Then, integrins will firmly attach to the adhesion molecules on the endothelial cells, which is called adhesion.
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Mammary Glands
- Laminin and collagen in myoepithelial basement membrane interacting with beta-1 integrin on epithelial surface again, is essential in this process.