6qio

Ternary complex of FcRn ectodomain, FcRn binding optimised human serum albumin and the human growth hormone derivative somapacitan

spinqualitylabelsall models 6qio, resolution 1.95Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6qio is a 3 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.95Å Ligands: CYS, JG5, MES Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Disease ALBU_HUMAN Defects in ALB are a cause of familial dysalbuminemic hyperthyroxinemia (FDH) [MIM:103600. FDH is a form of euthyroid hyperthyroxinemia that is due to increased affinity of ALB for T(4). It is the most common cause of inherited euthyroid hyperthyroxinemia in Caucasian population. Function ALBU_HUMAN Serum albumin, the main protein of plasma, has a good binding capacity for water, Ca(2+), Na(+), K(+), fatty acids, hormones, bilirubin and drugs. Its main function is the regulation of the colloidal osmotic pressure of blood. Major zinc transporter in plasma, typically binds about 80% of all plasma zinc. Publication Abstract from PubMed Somapacitan, a human growth hormone derivative that binds reversibly to albumin, was investigated for human serum albumin (HSA) and HSA domain binding. Isothermal titration calorimetry (ITC) binding profiles showed high-affinity binding ( approximately 100-1000 nM) of one somapacitan molecule and low-affinity binding ( approximately 1000-10000 nM) of one to two somapacitan molecules to HSA. The high-affinity site was identified in HSA domain III using size exclusion chromatography (SEC) and ITC. SEC studies showed that the neonatal Fc receptor shields one binding site for somapacitan, indicating its position in domain III. A crystal structure of somapacitan in complex with HSA optimized for neonatal Fc receptor binding, having four amino acid residue replacements, identified a low-affinity site in fatty acid-binding site 6 (domain II). Surface plasmon resonance (SPR) showed these replacements affect the kinetics of the high-affinity binding site. Furthermore, small-angle X-ray scattering and SPR brace two somapacitan-binding sites on HSA. Identification of Binding Sites on Human Serum Albumin for Somapacitan, a Long-Acting Growth Hormone Derivative.,Johansson E, Nielsen AD, Demuth H, Wiberg C, Schjodt CB, Huang T, Chen J, Jensen S, Petersen J, Thygesen P Biochemistry. 2020 Apr 14;59(14):1410-1419. doi: 10.1021/acs.biochem.0c00019., Epub 2020 Mar 30. PMID:32208682 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Albumin 3D structures Beta-2 microglobulin 3D structures

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