4nkq

Structure of a Cytokine Receptor Complex

spinqualitylabelsall models 4nkq, resolution 3.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4nkq is a 3 chain structure with sequence from Homo sapiens. This structure supersedes the now removed PDB entry 3cxe. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: NAG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Disease IL3RB_HUMAN Defects in CSF2RB are the cause of pulmonary surfactant metabolism dysfunction type 5 (SMDP5) [MIM:614370. SMDP5 is a rare lung disorder due to impaired surfactant homeostasis. It is characterized by alveolar filling with floccular material that stains positive using the periodic acid-Schiff method and is derived from surfactant phospholipids and protein components. Excessive lipoproteins accumulation in the alveoli results in severe respiratory distress. Function IL3RB_HUMAN High affinity receptor for interleukin-3, interleukin-5 and granulocyte-macrophage colony-stimulating factor. Publication Abstract from PubMed The GM-CSF, IL-3, and IL-5 receptors constitute the betac family, playing important roles in inflammation, autoimmunity, and cancer. Typical of heterodimeric type I cytokine receptors, signaling requires recruitment of the shared subunit to the initial cytokine:alpha subunit binary complex through an affinity conversion mechanism. This critical process is poorly understood due to the paucity of crystal structures of both binary and ternary receptor complexes for the same cytokine. We have now solved the structure of the binary GM-CSF:GMRalpha complex at 2.8-A resolution and compared it with the structure of the ternary complex, revealing distinct conformational changes. Guided by these differences we performed mutational and functional studies that, importantly, show GMRalpha interactions playing a major role in receptor signaling while betac interactions control high-affinity binding. These results support the notion that conformational changes underlie the mechanism of GM-CSF receptor activation and also suggest how related type I cytokine receptors signal. Conformational Changes in the GM-CSF Receptor Suggest a Molecular Mechanism for Affinity Conversion and Receptor Signaling.,Broughton SE, Hercus TR, Nero TL, Dottore M, McClure BJ, Dhagat U, Taing H, Gorman MA, King-Scott J, Lopez AF, Parker MW Structure. 2016 Jul 6. pii: S0969-2126(16)30124-1. doi:, 10.1016/j.str.2016.05.017. PMID:27396825 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Colony-stimulating factor 3D structures Colony-stimulating factor receptor 3D structures

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