7YNJ image
Entry Detail
PDB ID:
7YNJ
EMDB ID:
Title:
Structure of human SGLT2-MAP17 complex bound with substrate AMG in the occluded conformation
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2022-07-31
Release Date:
2023-05-31
Method Details:
Experimental Method:
Resolution:
3.33 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Sodium/glucose cotransporter 2
Chain IDs:A
Chain Length:672
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:PDZK1-interacting protein 1
Chain IDs:B
Chain Length:114
Number of Molecules:1
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Structures of human SGLT in the occluded state reveal conformational changes during sugar transport.
Nat Commun 14 2920 2920 (2023)
PMID: 37217492 DOI: 10.1038/s41467-023-38720-1

Abstact

Sodium-Glucose Cotransporters (SGLT) mediate the uphill uptake of extracellular sugars and play fundamental roles in sugar metabolism. Although their structures in inward-open and outward-open conformations are emerging from structural studies, the trajectory of how SGLTs transit from the outward-facing to the inward-facing conformation remains unknown. Here, we present the cryo-EM structures of human SGLT1 and SGLT2 in the substrate-bound state. Both structures show an occluded conformation, with not only the extracellular gate but also the intracellular gate tightly sealed. The sugar substrate are caged inside a cavity surrounded by TM1, TM2, TM3, TM6, TM7, and TM10. Further structural analysis reveals the conformational changes associated with the binding and release of substrates. These structures fill a gap in our understanding of the structural mechanisms of SGLT transporters.

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Primary Citation of related structures