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| Title | Cryo-EM structure of fission yeast tetrameric α-mannosidase Ams1. |
|---|---|
| Journal, issue, pages | FEBS Open Bio, Vol. 10, Issue 11, Page 2437-2451, Year 2020 |
| Publish date | Oct 20, 2020 |
Authors | Jianxiu Zhang / Ying-Ying Wang / Li-Lin Du / Keqiong Ye / ![]() |
| PubMed Abstract | Fungal α-mannosidase Ams1 and its mammalian homolog MAN2C1 hydrolyze terminal α-linked mannoses in free oligosaccharides released from misfolded glycoproteins or lipid-linked oligosaccharide donors. ...Fungal α-mannosidase Ams1 and its mammalian homolog MAN2C1 hydrolyze terminal α-linked mannoses in free oligosaccharides released from misfolded glycoproteins or lipid-linked oligosaccharide donors. Ams1 is transported by selective autophagy into vacuoles. Here, we determine the tetrameric structure of Ams1 from the fission yeast Schizosaccharomyces pombe at 3.2 Å resolution by cryo-electron microscopy. Distinct from a low resolution structure of S. cerevisiae Ams1, S. pombe Ams1 has a prominent N-terminal tail that mediates tetramerization and an extra β-sheet domain. Ams1 shares a conserved active site with other enzymes in glycoside hydrolase family 38, to which Ams1 belongs, but contains extra N-terminal domains involved in tetramerization. The atomic structure of Ams1 reported here will aid understanding of its enzymatic activity and transport mechanism. |
External links | FEBS Open Bio / PubMed:32981237 / PubMed Central |
| Methods | EM (single particle) |
| Resolution | 3.2 Å |
| Structure data | EMDB-30021, PDB-6lz1: |
| Chemicals | ![]() ChemComp-ZN: |
| Source |
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Keywords | HYDROLASE / glycoside hydrolase |
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