Human Endoglin/CD105 Antibody Summary
Glu26-Gly256
Accession # Q5T9B9
Applications
under non-reducing conditions only
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Reconstitution Calculator
Preparation and Storage
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: Endoglin/CD105
Endoglin (CD105) is a 90 kDa type I transmembrane glycoprotein of the zona pellucida (ZP) family of proteins (1-3). Endoglin and betaglycan/T beta RIII are type III receptors for TGF‑ beta superfamily ligands, sharing 71% aa identity in the transmembrane (TM) and cytoplasmic domains. Endoglin is highly expressed on proliferating vascular endothelial cells, chondrocytes, and syncytiotrophoblasts of term placenta, with lower amounts on hematopoietic, mesenchymal and neural crest stem cells, activated monocytes, and lymphoid and myeloid leukemic cells (2 - 5). Human endoglin cDNA encodes 658 amino acids (aa) including a 25 aa signal sequence, a 561 aa extracellular domain (ECD) with an orphan domain and a two-part ZP domain, a TM domain and a 47 aa cytoplasmic domain (1-3). An isoform with a 14 aa cytoplasmic domain (S-endoglin) can oppose effects of long (L) endoglin (6, 7). The human endoglin ECD shares 65-72% aa identity with mouse, rat, bovine, porcine and canine endoglin. Endoglin homodimers interact with TGF-beta 1 and TGF-beta 3 (but not TGF-beta 2), but only after binding T beta RII (8). Similarly, they interact with Activin A and BMP-7 via activin type IIA or B receptors, and with BMP-2 via BMPR-IA/ALK-3 or BMPR-IB/ALK-6 (9). BMP-9, however, is reported to bind endoglin directly (10). Endoglin modifies ligand-induced signaling in multiple ways. For example, expression of endoglin can inhibit TGF-beta 1 signals but enhance BMP-7 signals in the same myoblast cell line (11). In endothelial cells, endoglin inhibits T beta RI/ALK-5, but enhances ALK1-mediated activation (12). Deletion of mouse endoglin causes lethal vascular and cardiovascular defects, and human endoglin haploinsufficiency can a cause the vascular disorder, hereditary hemorrhagic telangiectasia type I (13, 14). These abnormalities confirm the essential function of endoglin in differentiation of smooth muscle, angiogenesis, and neovascularization (2-4, 12-14). In preeclampsia of pregnancy, high levels of proteolytically generated soluble endoglin and VEGF R1 (sFlt-1), along with low placental growth factor (PlGF), are pathogenic due to antiangiogenic activity (15).
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- Barbara, N.P. et al. (1999) J. Biol. Chem. 274:584.
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- Scherner, O. et al. (2007) J. Biol. Chem. 282:13934.
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- Lebrin, F. and C.L. Mummery (2008) Trends Cardiovasc. Med. 18:25.
- Venkatesha, S. et al. (2006) Nat. Med. 12:642.
Product Datasheets
Citations for Human Endoglin/CD105 Antibody
R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.
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Microglial Phenotyping in Neurodegenerative Disease Brains: Identification of Reactive Microglia with an Antibody to Variant of CD105/Endoglin
Authors: DG Walker, LF Lue, TG Beach, I Tooyama
Cells, 2019-07-23;8(7):.
Species: Human
Sample Types: Cell Lysates, Whole Tissue
Applications: IHC, Western Blot -
Matrix metalloproteinase-14 (MT1-MMP)-mediated endoglin shedding inhibits tumor angiogenesis.
Authors: Hawinkels LJ, Kuiper P, Wiercinska E
Cancer Res., 2010-04-27;70(10):4141-50.
Species: Human
Sample Types: Cell Lysates
Applications: Western Blot -
Induction of an epithelial integrin alphavbeta6 in human cytomegalovirus-infected endothelial cells leads to activation of transforming growth factor-beta1 and increased collagen production.
Authors: Tabata T, Kawakatsu H, Maidji E, Sakai T, Sakai K, Fang-Hoover J, Aiba M, Sheppard D, Pereira L
Am. J. Pathol., 2008-03-18;172(4):1127-40.
Species: Human
Sample Types: Cell Lysates, Whole Cells
Applications: Flow Cytometry, Western Blot
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