Fibulin-1 (UniProt P23142; also known as FIBL-1) is encoded by the FBLN1 (also known as FIBL1, FBLN, PP213) gene (Gene ID 2192) in human. Fibulin-1 is an extracellular matrix protein that interacts with fibronectin and inhibits cell migration and invasion in a fibronectin-dependent manner. Research shows that the EGF-like domains 5 and 6 of fibulin-1 compete against syndecan-4 for binding the C-terminal heparin-binding domain (HepII) of fibronectin, resulting in a suppression of fibronectin-regulated cell adhesion and motility. Fibulin-1 also interacts with fibrinogen and regulates platelet adhesion to influence hemoglutination. In addition, fibulin-1 interacts with elastin and plays a role in the assembly of elastic fibers by mediating association between versican and fibrillin. Other fibulin-1 interactors include calumenin, extracellular matrix protein 1, angiogenin, and hemicentin. There exist four major fibulin-1 isoforms (A, B, C, and D) generated by alternative splicing, with isoforms C and D being the predominant forms. In addition, a smaller isoform of fibulin-1D, fibulin-1D′, is reported to localize in the cytosol and interacts with the intracellular domain of integrin β1. Fibulin-1 is initially produced with a signal peptide (a.a. 1-29), the removal of which yields the mature protein with three N-terminal Anaphylatoxin-like domains (a.a. 36-76, 77-111, 112-144), followed by eight EGF-like domains (a.a. 176-578 of isoform D), with EGF-like domains 5 & 6 mediating fibulin-1 self-association and fibronectin-binding. The C-terminal 137-amino acid in isoform D is truncated in isoform A, and replaced by a shorter sequence of 35 amino acids in isoform B and a sequence of 117 amino acids in isoform C.

Expected to react with all four spliced isoforms of human fibulin-1 (UniProt P23142-1 to P23142-4).

Epitope: EGF-like domains 4-6.

GST-tagged recombinant protein corresponding to EGF-like domains 4-6 of human Fibulin-1.

Detect Fibulin-1 using this Anti-Fibulin-1 Antibody, clone 3D12.1 validated for use in Western Blotting, Immunohistochemistry.

Immunohistochemistry Analysis: A 1:250 dilution from a representative lot detected Fibulin-1 in human placenta and human breast tissue.

Research Category
Cell Structure

Research Sub Category
ECM Proteins

Evaluated by Western Blotting in SH-SY5Y cell lysate.

Western Blotting Analysis: 4.0 µg/mL of this antibody detected Fibulin-1 in 10 µg of SH-SY5Y cell lysate.

~77 kDa observed. 77.2 kDa (isoform D), 61.6 kDa (isoform A), 65.4 kDa (isoform B), and 74.4 kDa (Isoform C) calculated.

Format: Purified

Protein G Purified

Purified mouse monoclonal IgG2aκ antibody in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide.

Stable for 1 year at 2-8°C from date of receipt.

Concentration: Please refer to lot specific datasheet.

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