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A rare, hereditary, primary immunodeficiency due to a complement cascade protein anomaly characterized by significantly increased susceptibility to Neisseria species infections. It only affects males, typically presenting with severe or fulminant meningococcal disease.
Features include: Dysfunctional alternative complement pathway and Abnormality of metabolism/homeostasis.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Metabolism | 1 | Abnormality of metabolism/homeostasis |
CFP encodes complement factor properdin (469 aa). A positive regulator of the alternate pathway (AP) of complement. It binds to and stabilizes the C3- and C5-convertase enzyme complexes. Highest expression in Whole Blood (232.1 TPM) and Spleen (114.7 TPM).
Properdin deficiency, X-linked is associated with mutations in the CFP gene on chromosome X.
CFP is classified as a druggable target (Cell Surface, Druggable Genome, and Enzyme categories) with score 0.0.
Genetic testing for CFP is available. Testing is considered confirmatory for diagnosis.
Data assembled from 5 of 12 sources · Last updated Sep 20, 2026, 1:17 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center