8AKV image
Deposition Date 2022-07-31
Release Date 2024-02-14
Last Version Date 2024-09-04
Entry Detail
PDB ID:
8AKV
Keywords:
LIPID BINDING PROTEIN
Title:
270 A SynPspA rod after incubation with ATP
Biological Source:
Source Organism:
Synechocystis sp. PCC 6803 (Taxon ID: 1148)
Host Organism:
Escherichia coli BL21(DE3)
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
4.40 Å
Aggregation State:
HELICAL ARRAY
Reconstruction Method:
HELICAL
8AKV validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Chloroplast membrane-associated 30 kD protein
Gene (Uniprot):im30
Chain IDs:A (auth: 0), B (auth: 1), C (auth: 2), D (auth: 3), E (auth: 4), F (auth: 5), G (auth: 6), H (auth: 7), I (auth: A), J (auth: B), K (auth: C), L (auth: D), M (auth: E), N (auth: F), O (auth: G), P (auth: H), Q (auth: I), R (auth: J), S (auth: K), T (auth: L), U (auth: M), V (auth: N), W (auth: O), X (auth: P), Y (auth: Q), Z (auth: R), AA (auth: S), BA (auth: T), CA (auth: U), DA (auth: V), EA (auth: W), FA (auth: X), GA (auth: Y), HA (auth: Z), IA (auth: a), JA (auth: b), KA (auth: c), LA (auth: d), MA (auth: e), NA (auth: f), OA (auth: g), PA (auth: h), QA (auth: i), RA (auth: j), SA (auth: k), TA (auth: l), UA (auth: m), VA (auth: n), WA (auth: o), XA (auth: p), YA (auth: q), ZA (auth: r), AB (auth: s), BB (auth: t), CB (auth: u), DB (auth: v), EB (auth: w), FB (auth: x), GB (auth: y), HB (auth: z)
Chain Length:246
Number of Molecules:60
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P74717 Pfam ID:PF04012
Ligand Molecules
NA
Primary Citation
Structural plasticity of bacterial ESCRT-III protein PspA in higher-order assemblies.
Nat.Struct.Mol.Biol. ? ? ? (2024)
PMID: 39152237 DOI: 10.1038/s41594-024-01359-7

Abstact

Eukaryotic members of the endosome sorting complex required for transport-III (ESCRT-III) family have been shown to form diverse higher-order assemblies. The bacterial phage shock protein A (PspA) has been identified as a member of the ESCRT-III superfamily, and PspA homo-oligomerizes to form rod-shaped assemblies. As observed for eukaryotic ESCRT-III, PspA forms tubular assemblies of varying diameters. Using electron cryo-electron microscopy, we determined 61 Synechocystis PspA structures and observed in molecular detail how the structural plasticity of PspA rods is mediated by conformational changes at three hinge regions in the monomer and by the fixed and changing molecular contacts between protomers. Moreover, we reduced and increased the structural plasticity of PspA rods by removing the loop connecting helices α3/α4 and the addition of nucleotides, respectively. Based on our analysis of PspA-mediated membrane remodeling, we suggest that the observed mode of structural plasticity is a prerequisite for the biological function of ESCRT-III members.

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Primary Citation of related structures
8AKV