Native Human Complement Component C3c

Hersteller Cell Sciences
Typ Proteins
Specific against Human
Menge 1.0 mg
Host Human
ArtNr CS-CRC164B
eClass 6.1 34160400
eClass 9.0 42020190
Native Human Complement Component C3c. The C3c component is central in both complement activation pathways, with different specific proteolytic systems cleaving it to form C3 convertase. Cleavage of C3 releases C3a and the C3b fragment which is part of the alternative C3 convertase. C3 levels can be low because of decreased synthesis or due to consumption. High C3 levels are seen in highly acute or chronic inflammation, hepatic cholestasis and during the third trimester of pregnancy. Unwanted complement activation is a major cause of tissue damage in various pathological conditions and contributes to quite a few immune complex diseases. Compstatin is an effective inhibitor of the activation of complement component C3 and thus blocks a central and essential step in the complement cascade. The specific binding site on C3, the configuration in the bound form, and the exact mode of action of compstatin are unknown. The crystal structure of compstatin in complex with C3c reveals that the compstatin-binding site is formed by the macroglobulin (MG) domains 4 and 5. This binding site is part of the structurally stable MG-ring created by domains MG1-6 and is distant from any other known binding site on C3. Compstatin does not modify the conformation of C3c, while compstatin itself undergoes a large conformational alteration upon binding.
Lyophilized white powder sterile filtered from a Sodium Phosphate Buffer, pH 7.2, + 0.15 M NaCl.
Centrifuge vial prior to opening. Reconstitute in deionized water.
Storage and Stability
Store at 2-4C.
Human Plasma
Molecular Weight
180 kDa
Endotoxin Level
< 0.1 ng/ug of protein.
Menge: 1.0 mg
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