Recombinant Mouse Dll4 Protein (His Tag)

Specifications

Catalog number

PDMM100144-01

Size / count

20 µg

Dry ice

No

Hazardous

No

Discontinued

No

Background

Delta-like protein 4 (DLL4 , Delta4), a type I membrane-bound Notch ligand , is one of five known Notch ligands in mammals and interacts predominantly with Notch 1 , which has a key role in vascular development. Recent studies yield substantial insights into the role of DLL4 in angiogenesis. DLL4 is induced by vascular endothelial growth factor (VEGF) and acts downstream of VEGF as a 'brake' on VEGF-induced vessel growth , forming an autoregulatory negative feedback loop inactivating VEGF. DLL4 is downstream of VEGF signaling and its activation triggers a negative feedback that restrains the effects of VEGF. Attenuation of DLL4/Notch signaling results in chaotic vascular network with excessive branching and sprouting. DLL4 is widely distributed in tissues other than vessels including many malignancies. Furthermore , the molecule is internalized on binding its receptor and often transported to the nucleus. In pathological conditions , such as cancer , DLL4 is up-regulated strongly in the tumour vasculature. Blockade of DLL4-mediated Notch signaling strikingly increases nonproductive angiogenesis , but significantly inhibits tumor growth in preclinical mouse models. In preclinical studies , blocking of DLL4/Notch signaling is associated with a paradoxical increase in tumor vessel density , yet causes marked growth inhibition due to functionally defective vasculature. Thus , DLL4 blockade holds promise as an additional strategy for angiogenesis-based cancer therapy.

Abbreviation

Dll4

Synonyms

DLL; Dll4; Delta4

UniProt

Q9JI71

Accession Number

Q9JI71

Expression System

Mammalian

Tag

C-His

Sequence

Ser28-Pro525

Endotoxin

< 1.0 EU/mg of the protein as determined by the LAL method.

Purity

> 90% as determined by reducing SDS-PAGE.

Bioactivity

Not validated for activity

Reconstitution

It is recommended that sterile water be added to the vial to prepare a stock solution of 0.5 mg/mL. Concentration is measured by UV-Vis.

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

54.7 kDa

Observed Molecular Weight

80 kDa

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with 5% Trehalose and 5% Mannitol.

Species

Mouse