Defective CSF2RB does not bind SFTPs

Stable Identifier
Reaction [transition]
Homo sapiens
Locations in the PathwayBrowser
SVG |   | PPTX  | SBGN
Click the image above or here to open this reaction in the Pathway Browser
The layout of this reaction may differ from that in the pathway view due to the constraints in pathway layout

Surfactant catabolism by alveolar macrophages plays a small but critical part in surfactant recycling and metabolism. Upon ligand binding, granulocyte-macrophage colony-stimulating factor receptor (GM-CSF), a heterodimer of alpha (CSF2RA) and beta (CSF2RB) subunits, initiates a signalling process that not only induces proliferation, differentiation and functional activation of hematopoietic cells but can also determine surfactant uptake into alveolar macrophages and its degradation via clathrin-coated vesicles. Defects in human CSF2RB can cause pulmonary surfactant metabolism dysfunction 5 (SMDP5; MIM:614370, aka pulmonary alveolar proteinosis 5, PAP5), a rare lung disorder due to impaired surfactant homeostasis characterised by alveoli filling with floccular material causing respiratory failure. Mutations in CSF2RB that cause SMDP5 are R211Efs*54 and S271L (Tanaka et al. 2011, Suzuki et al. 2011).

Literature References
PubMed ID Title Journal Year
21205713 Hereditary pulmonary alveolar proteinosis caused by recessive CSF2RB mutations

Carey, BC, Maranda, B, Sakagami, T, Couture, CY, Trapnell, BC, Chalk, C, Catellier, P, Suzuki, T

Eur. Respir. J. 2011
21075760 Adult-onset hereditary pulmonary alveolar proteinosis caused by a single-base deletion in CSF2RB

Nakata, K, Nagayasu, T, Tsuchihashi, Y, Hayashi, T, Morimoto, K, Kaneko, C, Yamamoto, T, Tazawa, R, Motoi, N, Ariyoshi, K, Nei, T, Tagawa, T, Kuribayashi, F, Tanaka, T

J. Med. Genet. 2011
Normal reaction
Functional status

Loss of function of CSF2RA:CSF2RB mutants [plasma membrane]

Cite Us!