|
 DOMAIN
STRUCTURE OF THROMBOMODULIN. The
domain structure of thrombomodulin is represented, where: EGF = regions
containing sequence homologous to human epidermal growth factor, O-GLYCOS
= region rich in O-glycosylation sites, MEM = membrane spanning region,
CYTO = cytoplasmic domain containing a free cycteine.
PURCHASING
AND PRODUCT INFORMATION
|
Catalog
Number
RABTM-4202 |
Description
Rabbit Lung Thrombomodulin |
Size
50
µg
|
Formulation
20
mM Tris, 150 mM NaCl, 0.05% PDOC, pH 7.4
|
|
Storage
-80oC |
Purity
>95%
by SDS-PAGE |
Activity
Determination
Protein
C activation assay |
Shelf
Life (properly stored)
12
months |
|
Sample
publications referencing our Rabbit Thrombomodulin:
-
Zachary,
J., et al., Ultrasound Med Biol. 2006 November ; 32(11): 1781–1791.
(stanard in ELISA)
-
Panteleev,
M., et al., Biophysical Journal Volume 90 March 2006 1489–1500
(inhibition of clot growth)
This
publication list is not all encompassing, and is only meant to
provide limited examples of how Haematologic Technologies'
products are used. We encourage you to search the literature
for other examples pertinent to your experimentation, and to
contact us with any technical questions. |
|
U.S.
Pricing |
Product
inquiry |
SAMPLE
DATA SHEET |
ORDER
NOW! |
Overview
of Thrombomodulin
Thrombomodulin (TM) is an integral membrane glycoprotein expressed on the surface of endothelial cells. Its discovery by Esmon and Owen has focused attention on the importance of the
protein C anticoagulant pathway (1,2). TM serves as a cofactor for protein C activation by forming a 1:1 stoichiometric complex with thrombin
(Kd=10-10M), which accelerates the rate of protein C activation by 1000-fold relative to the rate with thrombin alone. In addition to facilitating protein C activation, the binding of thrombin to TM drastically alters the procoagulant activity of thrombin. When bound to TM, thrombin no longer clots fibrinogen, activates
factor V, inactivates protein S or triggers platelet aggregation.
TM is a single chain protein composed of 5 distinct domains. The domain structure of TM is similar to the low density lipoprotein (LDL) receptor. A short cytoplasmic domain containing a free cysteine is located at the COOH-terminal end and is joined by a membrane spanning region to an O-glycosylation rich domain. The latter is followed by an epidermal growth factor (EGF) homology region and the
NH2-terminal hydrophobic domain. The EGF homology region contains 6 EGF-like domains and contains the binding sites for both
thrombin and protein C.
Thrombomodulin is isolated from rabbit lung by a modification (3) of the procedure described by Galvin et al. (4) and is supplied as a sterile solution in 0.02 M Tris, 0.15 M NaCl, pH 7.4, containing 0.05 % polidocanol, and can be stored at
-80°C for up to a year. Purity is determined by SDS-PAGE analysis and activity is determined using a chromogenic assay for protein C activation.
|
Properties
of Thrombomodulin |
|
Localization: |
Endothelial
cell membrane, traces of degraded, yet functional, TM detected in human
urine and plasma (7,8) |
|
Mode
of action: |
Cofactor;
enhances the proteolytic activation of protein C by thrombin |
|
Molecular
weight: |
74,000 (5) |
|
Extinction coefficient:
|
|
|
Isoelectric
point: |
2.5 (2) |
|
Structure: |
Single chain,
NH2-terminal hydrophobic domain, six EGF domains, one O-glycosylation
rich domain, one transmembrane domain, COOH-terminal cytoplasmic domain |
|
Post-translational
modifications: |
β-hydroxyasparagine (0.5 mol/mol of
protein) (6) |
PURCHASING
AND PRODUCT INFORMATION
|
Catalog
Number
RABTM-4202 |
Description
Rabbit Lung Thrombomodulin |
Size
50
µg
|
Formulation
20
mM Tris, 150 mM NaCl, 0.05% PDOC, pH 7.4
|
|
Storage
-80oC |
Purity
>95%
by SDS-PAGE |
Activity
Determination
Protein
C activation
assay |
Shelf
Life (properly stored)
12
months |
|
U.S.
Pricing |
Product
inquiry |
SAMPLE
DATA SHEET |
ORDER
NOW! |
References
1. Esmon, C.T., et al., Proc. Natl. Acad. Sci. USA, 78, 2249 (1981).
2. Esmon, N.L., Semin. Thromb. Hemostas., 13, 454 (1987).
3. Haley, P.E., et al., J. Biol. Chem., 264, 16303 (1989).
4. Galvin, J.B., et al., J. Biol. Chem., 262, 2199 (1987).
5. Esmon, N.L., et al., J. Biol. Chem., 257, 859 (1982).
6. Stenflo, J., et al., J. Biol. Chem., 263, 21 (1988).
7. DeBault, L.E., et al., Lab Invest., 54, 172 (1986).
8. Ishi, J., et al., J. Clin. Invest., 76, 2178 (1985).
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