Target intelligence / Profile preview

Complement component C5b–9 membrane attack complex (MAC)

Target
MAC
Molecular classification
Protein complex, Pore-forming complex
01

Overview

The complement component C5b–9 membrane attack complex is an effector structure assembled from late-stage complement proteins that inserts into target cell membranes. Its main role is immune defense through direct cytolytic activity but it also modulates inflammation via sublytic signaling. Dysregulation contributes significantly to pathology across infectious disease, autoimmunity, cancer biology and transplantation medicine.

Other names
Membrane attack complexTerminal complement complexC5b-9 complexTCC
02

Mechanism of action

Inhibition of C5 cleavage/activation, scavenging of soluble complexes

03

Biological functions

Cell lysisImmune responseInflammationCytotoxicity
04

Disease associations

Autoimmune diseasesInflammatory conditionsTransplant rejectionInfection
05

Safety considerations

Increased susceptibility to encapsulated bacterial infectionsIncomplete complement inhibition
06

Interacting drugs

Eculizumab

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