Human Complement Component C1s Antibody
Human Complement Component C1s Antibody Summary
2% cross‑reactivity with recombinant human C1r is observed.
Accession # P09871
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.
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: Complement Component C1s
The classical complement pathway plays a major role in innate immunity against infection. This pathway is triggered by C1, a multimolecular complex composed of the recognition protein C1q and two serine proteases, C1r and C1s. Following the C1q recognition, C1r is autoactivated, and in turn activates C1s, which cleaves C4 and C2, the C1 substrates (1). Both C1r and C1s activation involve cleavage of a specific Arg-Ile bond, converting single-chain proenzymes into active proteases of disulfide bond-linked chains (A and B) (2). The A chains contain multiple domains in the order of CUB1-EGF-CUB2-CCP1-CCP2-Activation Peptide. The B chains contain the serine protease catalytic domain. The full-length (amino acid residues 1‑688) of human C1s was expressed (3‑5). The purified protein corresponded to the processed active form, with A and B chains starting at residue Glu16 and Ile438, respectively.
- Arlaud, G.J. et al. (2002) Biochem. Soc. Trans. 30:1001.
- Lacroix, M. et al. (2001) J. Biol. Chem. 276:36233.
- Tosi, M. et al. (1987) Biochemistry 26:8516.
- Mackinnon, C.M. et al. (1987) Eur. J. Biochem. 169:547.
- Kusumoto, H. et al. (1988) Proc. Natl. Acad. Sci. USA 85:7307.
Citations for Human Complement Component C1s 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.
Citations: Showing 1 - 3
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EDTA/gelatin zymography method to identify C1s versus activated MMP-9 in plasma and immune complexes of patients with systemic lupus erythematosus
Authors: E Ugarte-Ber, E Martens, L Boon, J Vandooren, D Blockmans, P Proost, G Opdenakker
J. Cell. Mol. Med., 2019;23(1):576-585.
Sample Types: Plasma
Effect of the Anti-C1s Humanized Antibody TNT009 and its Parental Mouse Variant TNT003 on HLA Antibody-induced Complement Activation - A Preclinical in Vitro Study
Authors: M Wahrmann, J Mühlbacher, L Marinova, H Regele, N Huttary, F Eskandary, G Cohen, GF Fischer, GC Parry, JC Gilbert, S Panicker, GA Böhmig
Am. J. Transplant, 2017;0(0):.
Applications: Flow Cytometry
Activation of the classical complement pathway by Bacillus anthracis is the primary mechanism for spore phagocytosis and involves the spore surface protein BclA.
Authors: Gu C, Jenkins SA, Xue Q, Xu Y
J. Immunol., 2012;188(9):4421-31.
Sample Types: Protein
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