SILu™Lite MAPT Microtubule-associated protein tau-441 human
SIGMA/MSST0032 - recombinant, expressed in HEK 293 cells, MS Protein Standard
Synonym: Neurofibrillary tangle protein; Paired helical filament-tau (PHF-tau); Pairedhelicalfilament-
Product Type: Chemical
SILuProt products are stable isotope-labeled full length proteins designed to be used as mass spectrometry internal standards for quantitative proteomics. Introduction of an internal SILuProt standard at the beginning of the MS workflow minimizes variations in quantification due to protein extraction, fractionation, enrichment, proteolysis and analysis
| assay | ≥98% (SDS-PAGE) |
| biological source | human |
| form | lyophilized powder |
| mol wt | calculated mol wt 50 kDa |
| potency | ≥98% Heavy amino acids incorporation efficiency by MS |
| Quality Level | 200  |
| recombinant | expressed in HEK 293 cells |
| storage temp. | −20°C |
| suitability | suitable for mass spectrometry (internal calibrator) |
| tag | 8-His tagged |
| V5 tagged | |
| technique(s) | mass spectrometry (MS): suitable |
| UniProt accession no. | P02649  |
| Biochem/physiol Actions: | SILu™Lite MAPT is a recombinant human protein expressed in human 293 cells. It consists of 481 amino acids (including C-terminal V5 and polyhistidine tags), with a calculated molecular mass of 50 kDa. SILu Lite MAPT is an analytical standard designed to be used as starting material for preparation of calibrators and controls in LC-MS applications. |
| General description: | Tau-441 is a member of the Tau family of proteins. Tau proteins are mainly expressed in the neurons of the central nervous system where they exert a role in stabilizing microtubules, key components of axonal transport, as well as in signal transduction.Tau proteins are subject to phosphorylation and this phenomenon regulates the association of the Tau protein with the microtubules. Deposits of Alzheimer′s disease AD-associated proteins, such as hyperphosphorylated Tau, as well as other shared misfolded proteins, such as, β-amyloid precursor protein (βAPP), ubiquitin, and various chaperones and protein kinases are thought to play a pathologic role in the cognitive decline and muscular failure.3 Malfunctioning of Tau proteins is associated with microtubules disintegration and collapsing of the neuronal transport system Among other diseases, Tau forms in cerebrospinal fluid are considered a reliable biomarker for progressive supranuclear palsy, where the levels of Tau forms ratio were significantly reduced. |
| Immunogen: | MAEPRQEFEVMEDHAGTYGLGDRKD |
| Legal Information: | SILu is a trademark of Sigma-Aldrich Co. LLC |
| Physical form: | Supplied as a lyophilized powder containing phosphate buffered saline. |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 2 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | ≥98% (SDS-PAGE) |
| Storage Temp. | −20°C |
| UNSPSC | 23201100 |