AdipoGen Life Sciences

Isthmin-1 (mouse) (rec.) (His)

CHF 330.00
In stock
AG-40B-0215-C05050 µgCHF 330.00
AG-40B-0215-30503 x 50 µgCHF 660.00
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Product Details
Synonyms ISM1; ISM
Product Type Protein
Source/Host HEK 293 cells

Mouse isthmin-1 (aa 30-461) is fused at the C-terminus to a His-tag.

Crossreactivity Mouse
MW ~65kDa (SDS-PAGE)
Purity ≥95% (SDS-PAGE)
Endotoxin Content <0.01EU/μg purified protein (LAL test).
Concentration 1mg/ml after reconstitution.
Reconstitution Reconstitute with 50µl endotoxin-free water.
Accession Number V9GXR4
Formulation Lyophilized. Contains PBS.
Other Product Data

UniProt link V9GXR4: Isthmin-1 (mouse) Protein

Shipping and Handling
Shipping BLUE ICE
Short Term Storage +4°C
Long Term Storage -20°C
Handling Advice After opening, prepare aliquots and store at -20°C.
Avoid freeze/thaw cycles.
Centrifuge lyophilized vial before opening and reconstitution.
For maximum product recovery after thawing, centrifuge the vial before opening the cap.
Use/Stability Stable for at least 6 months after receipt when stored at -20°C.
Working aliquots are stable for up to 3 months when stored at -20°C.
MSDS Download PDF
Product Specification Sheet
Datasheet Download PDF

Isthmin-1 (ISM1) was first identified as a gene expressed in the Xenopus midbrain hind brain organizer called isthmus, with a proposed role during early brain development. Isthmin-1 encodes a predicted ~50-kDa protein containing a signal peptide, a thrombospondin domain and an adhesion-associated domain. Isthmin-1 is important for embryonic and postnatal development. Growing evidence has shown that aberrant expression of Isthmin-1 can also affect the biological behavior of cancer. The Ism1 gene is conserved in mice and humans.

A recent study showed that Ism1 is an adipokine that induces glucose uptake in human and mouse adipocytes. Ism1 is secreted by mature adipocytes and triggers a signaling cascade similar to that of insulin, regulating glucose uptake while suppressing lipid accumulation.

Recombinant Isthmin-1 or overexpression of Ism1 causes a robust increase in GLUT4-dependent glucose uptake in cultured primary murine and immortalized human adipocytes as well as in primary human muscle cells and prevents insulin resistance and hepatic steatosis in a diet-induced obesity mouse model. Ablation of Isthmin-1 causes glucose intolerance and impaired insulin-stimulated adipocyte glucose uptake. Isthmin-1 suppresses de novo lipogenesis and increases protein synthesis in hepatocytes whereas Isthmin-1 knockdown in adipocytes reduces glucose uptake and insulin-dependent phosphorylation of protein kinase AKT at serine residue 473 (p-AKTSer473). Isthmin-1 signaling is dependent on PI3K and shares downstream phosphorylation targets with insulin signaling, such as p-AKTSer473, p-AKTThr308, p-ERK1/2Thr202/Tyr204 and p-S6Ser235/236. Isthmin-1 does not seem to act through the insulin receptor or the insulin-like growth factor 1 receptor; it is most likely to signal through another, yet to be identified, receptor tyrosine kinase.

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