Recombinant Human intestinal alkaline phosphatase / IAP Protein (Fc Tag)

Name: Recombinant Human intestinal alkaline phosphatase / IAP Protein (Fc Tag)
Brand: Beta LifeScience
SKU: BLPSN-3009
Availability: InStock

Collections: Other recombinant proteins, Recombinant proteins

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Product Overview

Tag	Fc
Host Species	Human
Accession	P09923
Synonym	IAP
Background	ALPI encodes for intestinal phosphatase alkaline, a brush border metalloenzyme that hydrolyses phosphate from the lipid A moiety of lipopolysaccharides and thereby drastically reduces Toll-like receptor 4 agonist activity. ALPI mutations impaired either stability or catalytic activity of ALPI and rendered it unable to detoxify lipopolysaccharide-dependent signalling. ALPI mutations should be included in screening for monogenic causes of inflammatory bowel diseases and lay the groundwork for ALPI-based treatments in intestinal inflammatory disorders.
Description	A DNA sequence encoding the mature form of human ALPI (P09923) (Met 1-Asp 503),without the pro peptide, was fused with a His tag at the C-terminus.
Source	HEK293
Predicted N Terminal	Val 20
AA Sequence	Met 1-Asp 503
Molecular Weight	The secreted recombinant human ALPI/Fc is a disulfide-linked homodimeric protein. The reduced monomer consists of 725 a.a. and has a predicted molecular mass of 79.5 kDa. The apparent molecular mass of rhALPI /Fc monomer is approximately 90-95 kDa in SDS-PAGE under reducing conditions due to glycosylation.
Purity	>83% as determined by SDS-PAGE
Endotoxin	< 1.0 EU per μg of the protein as determined by the LAL method
Bioactivity	Measured by its ability to cleave a fluorogenic substrate, 4-Methylumbelliferyl phosphate (4-MUP).The specific activity is > 10,000 pmoles/min/ug.
Formulation	Lyophilized from sterile PBS, pH 7.4.
Stability	The recombinant proteins are stable for up to 1 year from date of receipt at -70°C.
Usage	For Research Use Only
Storage	Store the protein under sterile conditions at -20°C to -80°C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.

Target Details

Target Function	Alkaline phosphatase that can hydrolyze various phosphate compounds.
Subcellular Location	Cell membrane; Lipid-anchor, GPI-anchor.
Protein Families	Alkaline phosphatase family
Database References	HGNC: 437 OMIM: 171740 KEGG: hsa:248 STRING: 9606.ENSP00000295463 UniGene: Hs.284255

Gene Functions References

Data confirm that, in enterocytes (Caco-2 cells), 1-alpha,25-dihydroxy-vitamin-D3 up-regulates expression of 2 isoforms of IAP, alternative splicing variants. PMID: 28931466
Expressions of human intestinal alkaline phosphatase and sucrase-isomaltase, which are intestinal differentiation markers, were highly enhanced in Caco-2 cells by menaquinone-4. PMID: 27865621
Data indicate alkaline phosphatase (AP) as the primary soluble ectonucleotidase in infants undergoing cardiopulmonary bypass and show decreased capacity to clear AMP when AP activity decreases post-bypass. PMID: 27384524
Intestinal alkaline phosphatase is a major regulator of gut mucosal permeability and appears to work at least partly through improving tight junction protein levels and localization. PMID: 27106638
A High Level of Intestinal Alkaline Phosphatase Is Protective Against Type 2 Diabetes Mellitus Irrespective of Obesity PMID: 26844282
Review of the role of intestinal alkaline phosphatase in inflammatory diseases. Loss of IAP expression or function is associated with increased intestinal inflammation, dysbiosis, bacterial translocation and subsequently systemic inflammation. PMID: 27083970
The expression of ALPi and MUC5AC in cocultures of Caco-2 and HT29 cells developed for permeability studies is reported. PMID: 26299896
Data indicate that histone deacetylase inhibitors (HDACi) induce intestinal alkaline phosphatase (ALPi) in a subset of colon cancer cell lines in a Kruppel-like factor 5 (KLF5)-dependent manner. PMID: 25037223
Report lowered intestinal alkaline phosphatase in the colonic mucosa of children with inflammatory bowel disease. PMID: 22783049
we are the first to demonstrate the alteration of protein expression of iAP in the duodenal mucosa of children with newly diagnosed coeliac disease PMID: 22262031
Mechanism of IAP action appears to be through dephosphorylation of specific bacterial components, including LPS, CpG DNA, and flagellin, and not on live bacteria. IAP likely targets these bacterially derived molecules as gut mucosal defense factor. PMID: 20489044
the structural differences in human AP isoforms are demonstrated through models PMID: 12372831
intestinal alkaline transactivation by Kruppel-like factor-4 is likely mediated through a critical region located within the proximal IAP promoter region PMID: 12919939
Northern blotting detected expression of two IAP transcripts, which were increased approximately 3-fold in response to thyroid hormone PMID: 15143152
receptor for Aeromonas sobria hemolysin PMID: 15715171
Cdx1 activates the IAP gene via a novel cis element, whereas Cdx2 inhibits the Cdx1 effects PMID: 15774940
Cotransfection with an HNF-4alpha expression vector demonstrated a direct activation of the ALPI promoter through -94 to -82 element PMID: 15831710
Crohn's disease increases the alkaline phosphatase activity in the intestine. Use histochemistry to differentiate Crohn's disease/ulcerative colitis. PMID: 17498884
has the ability to detoxify lipopolysaccharide and prevent bacterial invasion across the gut mucosal barrier. IAP expression and function are lost with starvation and maintained by enteral feeding PMID: 18292227
Cathepsin C propeptide interacts with intestinal alkaline phosphatase (IAP) and heat shock cognate protein 70. The propeptide of cathepsin C may stimulate the sorting to the lysosome contributing to the degradation of IAP in Caco-2 cells. PMID: 18307834
Suggest role for lysophosphatidylcholine in brush-border intestinal alkaline phosphatase release and restoration. PMID: 19407215

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.