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-Structure paper
タイトル | Structure of the murine lysosomal multienzyme complex core. |
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ジャーナル・号・ページ | Sci Adv, Vol. 7, Issue 20, Year 2021 |
掲載日 | 2021年5月12日 |
著者 | Alexei Gorelik / Katalin Illes / S M Naimul Hasan / Bhushan Nagar / Mohammad T Mazhab-Jafari / |
PubMed 要旨 | The enzymes β-galactosidase (GLB1) and neuraminidase 1 (NEU1; sialidase 1) participate in the degradation of glycoproteins and glycolipids in the lysosome. To remain active and stable, they ...The enzymes β-galactosidase (GLB1) and neuraminidase 1 (NEU1; sialidase 1) participate in the degradation of glycoproteins and glycolipids in the lysosome. To remain active and stable, they associate with PPCA [protective protein cathepsin A (CTSA)] into a high-molecular weight lysosomal multienzyme complex (LMC), of which several forms exist. Genetic defects in these three proteins cause the lysosomal storage diseases GM1-gangliosidosis/mucopolysaccharidosis IV type B, sialidosis, and galactosialidosis, respectively. To better understand the interactions between these enzymes, we determined the three-dimensional structure of the murine LMC core. This 0.8-MDa complex is composed of three GLB1 dimers and three CTSA dimers, adopting a triangular architecture maintained through six copies of a unique GLB1-CTSA polar interface. Mutations in this contact surface that occur in GM1-gangliosidosis prevent formation of the LMC in vitro. These findings may facilitate development of therapies for lysosomal storage disorders. |
リンク | Sci Adv / PubMed:33980489 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 4.59 Å |
構造データ | EMDB-22830, PDB-7kdv: |
化合物 | ChemComp-NAG: |
由来 |
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キーワード | HYDROLASE / glycosidase / protease / lysosome |