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[6] [2] The main hallmarks recognised by different disciplines to classify protein aggregates as amyloid is the presence of a fibrillar morphology with the expected diameter, detected using transmission electron microscopy (TEM) or atomic force microscopy (AFM), the presence of a cross-β secondary structure, determined with circular dichroism ...
Amyloid beta (Aβ, Abeta or beta-amyloid) denotes peptides of 36–43 amino acids that are the main component of the amyloid plaques found in the brains of people with Alzheimer's disease. [2] The peptides derive from the amyloid-beta precursor protein (APP), which is cleaved by beta secretase and gamma secretase to yield Aβ in a cholesterol ...
Amyloid-beta precursor protein (APP) is an integral membrane protein expressed in many tissues and concentrated in the synapses of neurons. It functions as a cell surface receptor [ 5 ] and has been implicated as a regulator of synapse formation , [ 6 ] neural plasticity , [ 7 ] antimicrobial activity, [ 8 ] and iron export . [ 9 ]
The term "amyloid" is derived from the Latin amyloideus ("starch-like"). [1] It refers to the fact that starch gives a similar reaction, also called an amyloid reaction. The test can be on microscopic features, such as spore walls or hyphal walls, or the apical apparatus or entire ascus wall of an ascus , or be a macroscopic reaction on tissue ...
p3 peptide also known as amyloid β- peptide (Aβ) 17–40/42 is the peptide resulting from the α-and γ-secretase cleavage from the amyloid precursor protein ().It is known to be the major constituent of diffuse plaques observed in Alzheimer's disease (AD) brains and pre-amyloid plaques in people affected by Down syndrome.
Amyloid beta immunostaining showing amyloid plaques (brown). Amyloid plaques (also known as neuritic plaques, amyloid beta plaques or senile plaques) are extracellular deposits of amyloid beta (Aβ) protein that present mainly in the grey matter of the brain.
Acute-phase serum amyloid A proteins (A-SAAs) are secreted during the acute phase of inflammation.These proteins have several roles, including the transport of cholesterol to the liver for secretion into the bile, the recruitment of immune cells to inflammatory sites, and the induction of enzymes that degrade extracellular matrix.
20219 Ensembl ENSG00000132703 ENSMUSG00000026542 UniProt P02743 P12246 RefSeq (mRNA) NM_001639 NM_011318 RefSeq (protein) NP_001630 NP_035448 Location (UCSC) Chr 1: 159.59 – 159.59 Mb Chr 1: 172.72 – 172.72 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse The serum amyloid P component (SAP) is the identical serum form of the amyloid P component (AP), a 25 kDa pentameric protein ...
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