7sj2

N-acetylglucosamine-1-phosphotransferase (GNPT) alpha and beta subunits (GNPTAB) catalytic domain, from zebrafish, in complex with uridine diphosphate N-acetylglucosamine (UDP-GlcNAc) and magnesium

spinqualitylabelsall models 7sj2, resolution 2.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7sj2 is a 2 chain structure with sequence from Danio rerio and Dictyostelium discoideum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.3Å Ligands: BMA, CA, FUC, MAN, MG, NAG, UD1 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q54MP1_DICDI GNPTA_DANRE Catalyzes the formation of mannose 6-phosphate (M6P) markers on high mannose type oligosaccharides in the Golgi apparatus. M6P residues are required to bind to the M6P receptors (MPR), which mediate the vesicular transport of lysosomal enzymes to the endosomal/prelysosomal compartment.[UniProtKB:Q3T906] Publication Abstract from PubMed The mannose-6-phosphate (M6P) pathway is responsible for the transport of hydrolytic enzymes to lysosomes. N-acetylglucosamine-1-phosphotransferase (GNPT) catalyzes the first step of tagging these hydrolases with M6P, which when recognized by receptors in the Golgi diverts them to lysosomes. Genetic defects in the GNPT subunits, GNPTAB and GNPTG, cause the lysosomal storage diseases mucolipidosis types II and III. To better understand its function, we determined partial three-dimensional structures of the GNPT complex. The catalytic domain contains a deep cavity for binding of uridine diphosphate-N-acetylglucosamine, and the surrounding residues point to a one-step transfer mechanism. An isolated structure of the gamma subunit of GNPT reveals that it can bind to mannose-containing glycans in different configurations, suggesting that it may play a role in directing glycans into the active site. These findings may facilitate the development of therapies for lysosomal storage diseases. Structures of the mannose-6-phosphate pathway enzyme, GlcNAc-1-phosphotransferase.,Gorelik A, Illes K, Bui KH, Nagar B Proc Natl Acad Sci U S A. 2022 Aug 16;119(33):e2203518119. doi:, 10.1073/pnas.2203518119. Epub 2022 Aug 8. PMID:35939698 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Phosphotransferase 3D structures

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