6y32 | pdb_00006y32

Structure of the GTPase heterodimer of human SRP54 and SRalpha

spinqualitylabelsall models 6y32, resolution 2.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6y32 is a 8 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 2.6Å Ligands: GNP, MG, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function SRP54_HUMAN Binds to the signal sequence of presecretory protein when they emerge from the ribosomes and transfers them to TRAM (translocating chain-associating membrane protein). Publication Abstract from PubMed The SRP54 GTPase is a key component of co-translational protein targeting by the signal recognition particle (SRP). Point mutations in SRP54 have been recently shown to lead to a form of severe congenital neutropenia displaying symptoms overlapping with those of Shwachman-Diamond syndrome. The phenotype includes severe neutropenia, exocrine pancreatic deficiency, and neurodevelopmental as well as skeletal disorders. Using a combination of X-ray crystallography, hydrogen-deuterium exchange coupled to mass spectrometry and complementary biochemical and biophysical methods, we reveal extensive structural defects in three disease-causing SRP54 variants resulting in critical protein destabilization. GTP binding is mostly abolished as a consequence of an altered GTPase core. The mutations located in conserved sequence fingerprints of SRP54 eliminate targeting complex formation with the SRP receptor as demonstrated in yeast and human cells. These specific defects critically influence the entire SRP pathway, thereby causing this life-threatening disease. Structural and Functional Impact of SRP54 Mutations Causing Severe Congenital Neutropenia.,Juaire KD, Lapouge K, Becker MMM, Kotova I, Michelhans M, Carapito R, Wild K, Bahram S, Sinning I Structure. 2020 Oct 13. pii: S0969-2126(20)30333-6. doi:, 10.1016/j.str.2020.09.008. PMID:33053321 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Signal recognition particle 3D structures Signal recognition particle receptor 3D structures

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