6zdm

Crystal structure of human heparanase in complex with a N',6O'-bis-sulfated 4-methylumbelliferyl heparan sulfate disaccharide

spinqualitylabelsall models 6zdm, resolution 1.71Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6zdm is a 2 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 1.714Å Ligands: EDO, NAG, QG2, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function HPSE_HUMAN Endoglycosidase that cleaves heparan sulfate proteoglycans (HSPGs) into heparan sulfate side chains and core proteoglycans. Participates in extracellular matrix (ECM) degradation and remodeling. Selectively cleaves the linkage between a glucuronic acid unit and an N-sulfo glucosamine unit carrying either a 3-O-sulfo or a 6-O-sulfo group. Can also cleave the linkage between a glucuronic acid unit and an N-sulfo glucosamine unit carrying a 2-O-sulfo group, but not linkages between a glucuronic acid unit and a 2-O-sulfated iduronic acid moiety. It is essentially inactive at neutral pH but becomes active under acidic conditions such as during tumor invasion and in inflammatory processes. Facilitates cell migration associated with metastasis, wound healing and inflammation. Enhances shedding of syndecans, and increases endothelial invasion and angiogenesis in myelomas. Acts as procoagulant by increasing the generation of activation factor X in the presence of tissue factor and activation factor VII. Increases cell adhesion to the extacellular matrix (ECM), independent of its enzymatic activity. Induces AKT1/PKB phosphorylation via lipid rafts increasing cell mobility and invasion. Heparin increases this AKT1/PKB activation. Regulates osteogenesis. Enhances angiogenesis through up-regulation of SRC-mediated activation of VEGF. Implicated in hair follicle inner root sheath differentiation and hair homeostasis. Publication Abstract from PubMed A synthetic heparan sulfate disaccharide has been assessed as a fluorogenic heparanase substrate, enabling enzyme turnover and inhibition kinetics measurements despite slow turnover. Crystal structures with human heparanase also provide the first ever observation of a substrate in an activated 1S3 conformation, highlighting previously unknown interactions involved in enzymatic processing. Our data provide insights into the heparanase catalytic mechanism, and will inform the design of improved heparanase substrates and inhibitors. Structural insights into heparanase activity using a fluorogenic heparan sulfate disaccharide.,Wu L, Wimmer N, Davies GJ, Ferro V Chem Commun (Camb). 2020 Nov 10;56(89):13780-13783. doi: 10.1039/d0cc05932c. PMID:33073275 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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