ISDA

Entry Detail

PDB ID:

8XIU

EMDB ID:

EMD-38390

Keywords:

TRANSPORT PROTEIN

Title:

Cryo-EM structure of a frog VMAT2 in an apo conformation

Biological Source:

Source Organism:

Xenopus laevis

Host Organism:

Komagataella pastoris

PDB Version:

Deposition Date:

2023-12-20

Release Date:

2024-08-14

Method Details:

Experimental Method:

ELECTRON MICROSCOPY

Resolution:

4.00 Å

Aggregation State:

PARTICLE

Reconstruction Method:

SINGLE PARTICLE

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:XlVMAT2
Chain IDs:A
Chain Length:514
Number of Molecules:1
Biological Source:Xenopus laevis

UniProt ID:A0A1L8FIB7 Pfam ID:PF07690

Ligand Molecules

Primary Citation

Engineering of a mammalian VMAT2 for cryo-EM analysis results in non-canonical protein folding.

Lyu, Y, Fu, C, Ma, H, Su, Z, Sun, Z, Zhou, X.Show

Nat Commun 15 6511 6511 (2024)

PMID: 39095428 DOI: 10.1038/s41467-024-50934-5

Abstact

Vesicular monoamine transporter 2 (VMAT2) belongs to the major facilitator superfamily (MFS), and mediates cytoplasmic monoamine packaging into presynaptic vesicles. Here, we present two cryo-EM structures of VMAT2, with a frog VMAT2 adopting a canonical MFS fold and an engineered sheep VMAT2 adopting a non-canonical fold. Both VMAT2 proteins mediate uptake of a selective fluorescent VMAT2 substrate into cells. Molecular docking, substrate binding and transport analysis reveal potential substrate binding mechanism in VMAT2. Meanwhile, caution is advised when interpreting engineered membrane protein structures.

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