Active Recombinant Mouse Dkk2 protein, His-tagged

• Cat.No.: Dkk2-194M
• Product Overview: Recombinant Mouse Dkk2(Ser26-Ile259) fused with Leu35Pro substitution and His tag at C-terminal was expressed in E. coli.

Specification

• Description: Dickkopf related protein 2 (Dkk-2) is a member of the Dickkopf family of secreted Wnt modulators. Dkk proteins contain a signal peptide and two conserved cysteine-rich domains that are separated by a linker region. The second cysteine-rich domain mediates Dkk-2 binding activities, and its interaction with LRP beta propellers has been mapped. The 226 aa, ~35 kDa mature mouse Dkk-2 shares 99%, 96%, 96%, 96% and 94% aa identity with rat, human, dog, horse and cow Dkk-2, respectively, and can activate the canonical Wnt signaling pathway in Xenopus embryos. Dkk proteins modify Wnt engagement of a receptor complex composed of a Frizzled protein and a low-density lipoprotein receptor-related protein, either LRP5 or LRP6. When LRP6 is over-expressed, direct high-affinity binding of Dkk-2 to LRP can enhance canonical Wnt signaling. However, when Dkk-2 and LRP6 form a ternary complex with Kremen2, Wnt signaling is inhibited due to internalization of Dkk-2/LRP6/Krm2 complexes. Thus, depending on the cellular context, Dkk-2 can either activate or inhibit canonical Wnt signaling. In contrast, binding of Dkk-1 or Dkk-4 to LRP is consistently antagonistic. Dkk proteins are expressed in mesenchymal tissues and control epithelial transformations. Dkk-2 expression has been studied most in bone and eye, although it is expressed as early as periimplantation in mice. Mouse Dkk-1 or Dkk-2 deficiencies have opposite effects on bone homeostasis, despite down-regulating Wnt antagonism in both cases. Dkk-2 expression is induced by Wnts in bone, and is thought to enhance bone density by promoting terminal differentiation of osteoblasts and mineral deposition. In contrast, Dkk-1 negatively regulates late osteoblast proliferation, which limits bone density. Dkk-2-deficient mice are blind, exhibiting faulty differentiation of corneal epithelium and ectopic blood vessels in the periocular mesenchyme.
• Source: E. coli
• Species: Mouse
• Tag: His
• Predicted N Terminal: Ser26
• Form: Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
• Bio-activity: Measured in a competitive binding assay. When Recombinant Mouse Kremen‑1 is immobilized at 4 µg/mL (100 µL/well), Recombinant Mouse Dkk-2 inhibits 50% binding of biotinylated Recombinant Human Dkk-1 (200 ng/mL) at the concentration range of 0.25-1.5 µg/mL.
• Molecular Mass: Predicted Molecular Mass: 27 kDa
  SDS-PAGE: 29-35 kDa, reducing conditions
• Endotoxin: <0.1 EU per 1 μg of the protein by the LAL method.
• Purity: >95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
• Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  12 months from date of receipt, -20 to -70 centigrade as supplied.
  1 month, 2 to 8 centigrade under sterile conditions after reconstitution.
  3 months, -20 to -70 centigrade under sterile conditions after reconstitution.
• Reconstitution: Reconstitute at 100 μg/mL in PBS containing at least 0.1% human or bovine serum albumin.
• Protein length: 26-259 a.a.

Gene Information

• Gene Name: DKK2 dickkopf 2 homolog (Xenopus laevis) [ Homo sapiens ]
• Official Symbol: Dkk2
• Synonyms: DKK2; dickkopf 2 homolog (Xenopus laevis); dickkopf (Xenopus laevis) homolog 2; dickkopf-related protein 2; hDkk-2; dickkopf-2; dickkopf homolog 2; dickkopf related protein-2; DKK-2
• Gene ID: 27123
• mRNA Refseq: NM_014421
• Protein Refseq: NP_055236
• MIM: 605415
• UniProt ID: Q9UBU2