SILu™Lite APOA1 Apolipoprotein A-1 human

Кат. номер

MSST0002-50UG

MSST0002-50UG-PW

Biochem/physiol Actions
Apolipoprotein A-1(Apo-A1), is a major protein component of high density lipoprotein (HDL)in plasma1. The protein promotes cholesterol efflux from tissues to the liver for excretion, and it is a cofactor for lecithin cholesterolacyltransferase (LCAT) which is responsible for the formation of most plasma cholesteryl esters2. Apo-A1 was shown to assist in the improvement of predicting cardiovascular events3. The gene that encodes to Apolipoprotein A-1 is APOA1. This gene is closely linked with two other apolipoprotein genes on chromosome 114. Defects in this gene are associated with HDL deficiencies, including Tangier disease5, and with systemic non-neuropathic amyloidosis6. The protein is made up of one major isoform (pI 5.6) and two minor isoforms (pI 5.53 and 5.46). Apo-A1 shows a high content of a-helix structure6. The amphipathic regions in the -helix structure seem to be responsible for lipid binding capacity. In aqueous solution, Apo-A1 shows self-association with minor conformational change7. In addition, it has been shown that Apo-A1 is implicated in the anti-endotoxin function of HDL via interaction with lipopolysaccharide or endotoxin8.
Physical form
Supplied as a lyophilized powder containing phosphate buffered saline.
Analysis Note
General Description
SILuLite APOA1 is a recombinant human protein expressed in human 293 cells. It is a monomer of 286 amino acids (including N-terminal signal sequence and C-terminal polyhistidine and V5 tags), with a molecular weight of 32.1 kDa. SILuLite APOA1 is an analytical standard designed to be used as starting material for preparation of calibrators and controls in LC-MS applications.
Sequence
RHFWQQDEPPQSPWDRVKDLATVYVDVLKDSGRDYVSQFEGSALGKQLNLKLLDNWDSVTSTFSKLREQLGPVTQEFWDNLEKETEGLRQEMSKDLEEVKAKVQPYLDDFQKKWQEEMELYRQKVEPLRAELQEGARQKLHELQEKLSPLGEEMRDRARAHVDALRTHLAPYSDELRQRLAARLEALKENGGARLAEYHAKATEHLSTLSEKAKPALEDLRQGLLPVLESFKVSFLSALEEYTKKLNTQSDPSRGPFEGKPIPNPLLGLDSTRTGHHHHHHHHGGQ
The N-terminal signal peptide and C-terminal linker peptide, V5 and polyhistidine tags are italicized.
Other Characterization

• Sequence confirmed by intact mass analysis
• Identity verified by peptide mapping
• purity >98% (SDS-PAGE)
• Vial content was determined by the Bradford method using BSA as a calibrator. The correction factor of Bradford-to-AAA is 88.33%

Suggested Quantitative Analysis Parameters
(MRM settings provided for three suggested peptides,)
SILu is a trademark of Sigma-Aldrich Co. LLC

Quality Level	200
biological source	human
recombinant	expressed in HEK 293 cells
assay	98% (SDS-PAGE)
form	lyophilized powder
packaging	vial of 50-65 µg (Lot-specific vial content given on certificate of analysis)
application(s)	mass spectrometry (MS): suitable
conjugate	His tagged","V5 tagged
UniProt accession no.	P02647,
storage temp.	20°C
Gene Information	human ... APOA1(335)

RIDADR	NONH for all modes of transport
WGK Germany	WGK 3
Flash Point F	Not applicable
Flash Point C	Not applicable