Recombinant Human Transferrin Protein (His Tag)

Specifications

Catalog number

PKSH031303

Size / count

100 µg

Dry ice

No

Hazardous

No

Discontinued

No

Background

Transferrin is a glycoprotein with an approximate molecular weight of 76.5 kDa. This glycoprotein is thought to have been created as a result of an ancient gene duplication event that led to generation of homologous C and N-terminal domains each of which binds one ion of ferric iron. The function of Transferrin is to transport iron from the intestine, reticuloendothelial system, and liver parenchymal cells to all proliferating cells in the body. This protein may also have a physiologic role as granulocyte / pollen-binding protein (GPBP) involved in the removal of certain organic matter and allergens from serum. Transferrins are iron binding transport proteins which bind Fe3+ ion in association with the binding of an anion, usually bicarbonate. It is responsible for the transport of iron from sites of absorption and heme degradation to those of storage and utilization. Serum transferrin may also have a further role in stimulating cell proliferation. When a transferrin loaded with iron encounters with a transferring receptor on cell surface, transferring binds to it and, as a consequence, is transported into the cell in a visicle by receptor-mediated endocytosis. The PH is reduced by hydrogen iron pumps. The lower pH causes transferrin to release its iron ions. The receptor is then transported through the endocytic cycle back to the cell surface, ready for another round of iron uptake. Each transferrin molecule has the ability to carry two iron ions in the ferric form.

Synonyms

Beta-1 metal-binding globulin; HEL-S-71p; PRO1557; PRO2086; Serotransferrin; Siderophilin; TF; TFQTL1; Transferrin

UniProt

P02787

Accession Number

NP_001054.1

Expression System

HEK293 Cells

Tag

C-His

Sequence

Met 1-Pro 698

Applications

Cell culture; ELISA

Field of Research

Signal Transduction; Cardiovascular; Isotypeloading control; metabolism

Endotoxin

< 1.0 EU per μg of the protein as determined by the LAL method.

Purity

> 95 % as determined by reducing SDS-PAGE.

Bioactivity

1. Immobilized human CD71 at 10 μg/ml (100 μl/well) can bind human Transferrin. The EC50 of human Transferrin is 5. 6 ng/mL. 2. Measured in a serum-free cell proliferation assay using MCF-7 human breast cancer cells. Karey, K. P. et al. (1988) Cancer Research 48:4083. The ED50 for this effect is typically 0.01-0.04 μg/mL.

Reconstitution

Please refer to the printed manual for detailed information.

Shipping Conditions

This product is provided as lyophilized powder which is shipped with ice packs.

Storage Conditions

Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80°C. Reconstituted protein solution can be stored at 4-8°C for 2-7 days. Aliquots of reconstituted samples are stable at < -20°C for 3 months.

Calculated Molecular Weight

76.6 kDa

Observed Molecular Weight

74 kDa

Species

Human