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A1075

Sigma-Aldrich

Amyloid β Protein Fragment 1-40

≥90% (HPLC), powder

Synonym(s):

Aβ40

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About This Item

Empirical Formula (Hill Notation):
C194H295N53O58S
CAS Number:
131438-79-4
Molecular Weight:
4329.80
MDL number:
MFCD00130509
UNSPSC Code:
12352202
NACRES:
NA.32

Quality Level

200

Assay

≥90% (HPLC)

form

powder

color

white

solubility

1% acetic acid: 1 mg/mL
saline: insoluble

UniProt accession no.

P05067

storage temp.

−20°C

Gene Information

human ... APP(351)

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Amino Acid Sequence

Asp-Ala-Glu-Phe-Arg-His-Asp-Ser-Gly-Tyr-Glu-Val-His-His-Gln-Lys-Leu-Val-Phe-Phe-Ala-Glu-Asp-Val-Gly-Ser-Asn-Lys-Gly-Ala-Ile-Ile-Gly-Leu-Met-Val-Gly-Gly-Val-Val

General description

Amyloid β Protein Fragment 1-40 (Aβ40) is derived from the amyloid-β protein (Aβ), which is mapped to human chromosome 21q21.3. Aβ40 is predominantly present in the vascular amyloid deposits. Aβ40 comprises of C-terminal membrane insertion domain. It shows structural transition from random coil to a α-helical structure in a water-micelle medium.

Application

Amyloid β Protein Fragment 1-40 has been used:
  • in the temperature based conformational studies using Fourier transform infrared/differential scanning calorimetry (FT-IR/DSC) studies
  • as a reference standard in sandwich-type enzyme immunoassay for quantifying amyloid A4 protein in cerebrospinal fluid of patients with head trauma
  • as a component of embryonic stem cell medium to inhibit amyloid deposition in fibroblasts

Biochem/physiol Actions

Amyloid β Protein Fragment 1-40 (Aβ40) forms cation based ion channels.
Amyloid β-protein is neurotrophic and neurotoxic in vivo and in vitro in human and rat neuronal cell cultures. β-Amyloid peptides (amino acids 1-42 and 1-43) are the major constituents of senile plaques and neurofibrillary tangles that occur in the hippocampus, neocortex, and amygdala of patients with Alzheimer′s disease.

Reconstitution

For maximal biological activity, dilute the stock in calcium-free PBS to 1 mg/ml and incubate at 37 °C for 4 days.

Other Notes

Lyophilized from 0.1% TFA in H2O

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Temperature-induced conformational changes in amyloid beta (1-40) peptide investigated by simultaneous FT-IR microspectroscopy with thermal system
Chu HL and Lin SY
Biophysical Chemistry, 89(2-3), 173-180 (2001)
Xujiao Huang et al.
Molecular medicine reports, 16(3), 2700-2706 (2017-07-18)
Alzheimer's disease (AD) is the most common type of senile dementia, which often develops in elderly or presenile individuals. As one of the pathological features of AD, amyloid β‑protein (Aβ) causes energy dysmetabolism, thereby inducing cellular damage and apoptosis. Salidroside
Diversity of amyloid beta protein fragment [1-40]-formed channels
Kourie JI, et al.
Cellular and Molecular Neurobiology, 21(3), 255-284 (2001)
Yi R Hu et al.
Current Alzheimer research, 18(3), 208-221 (2021-06-10)
Alzheimer's disease (AD) is the most common type of dementia and has a complex pathogenesis with no effective treatment. Energy metabolism disorders, as an early pathological event of AD,have attracted attention as a promising area of AD research. Codonopsis pilosula
Solution Structure of Amyloid beta-Peptide (1- 40) in a Water- Micelle Environment. Is the Membrane-Spanning Domain Where We Think It Is?
Coles M, et al.
Biochemistry, 37(31), 11064-11077 (1998)
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