7B0U image
Entry Detail
PDB ID:
7B0U
EMDB ID:
Title:
Stressosome complex from Listeria innocua
Biological Source:
PDB Version:
Deposition Date:
2020-11-22
Release Date:
2021-12-01
Method Details:
Experimental Method:
Resolution:
3.86 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:RsbR protein
Chain IDs:A, C, G, O (auth: Q), P (auth: K), R, V, DA (auth: d), EA (auth: e), GA (auth: g), KA (auth: k), SA (auth: s), TA (auth: t), VA (auth: v), ZA (auth: z), HB (auth: 7)
Chain Length:278
Number of Molecules:16
Biological Source:Listeria innocua serovar 6a (strain ATCC BAA-680 / CLIP 11262)
Polymer Type:polypeptide(L)
Description:RsbR protein
Chain IDs:B, D, H, J, Q (auth: L), S, W, Y, FA (auth: f), HA (auth: h), LA (auth: l), NA (auth: n), UA (auth: u), WA (auth: w), AB (auth: 0), CB (auth: 2)
Chain Length:278
Number of Molecules:16
Biological Source:Listeria innocua serovar 6a (strain ATCC BAA-680 / CLIP 11262)
Polymer Type:polypeptide(L)
Description:RsbS protein
Chain IDs:E, F, I, L (auth: N), M (auth: O), T, U, X, AA (auth: a), BA (auth: b), IA (auth: i), JA (auth: j), MA (auth: m), PA (auth: p), QA (auth: q), XA (auth: x), YA (auth: y), BB (auth: 1), EB (auth: 4), FB (auth: 5)
Chain Length:118
Number of Molecules:20
Biological Source:Listeria innocua serovar 6a (strain ATCC BAA-680 / CLIP 11262)
Polymer Type:polypeptide(L)
Description:RsbR protein
Mutations:T175/241-TPO
Chain IDs:K (auth: M), Z, OA (auth: o), DB (auth: 3)
Chain Length:278
Number of Molecules:4
Biological Source:Listeria innocua serovar 6a (strain ATCC BAA-680 / CLIP 11262)
Polymer Type:polypeptide(L)
Description:RsbR protein
Mutations:T175-TPO
Chain IDs:N (auth: P), CA (auth: c), RA (auth: r), GB (auth: 6)
Chain Length:278
Number of Molecules:4
Biological Source:Listeria innocua serovar 6a (strain ATCC BAA-680 / CLIP 11262)
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
TPO B THR modified residue
Ligand Molecules
Primary Citation
Molecular insights into intra-complex signal transmission during stressosome activation.
Commun Biol 5 621 621 (2022)
PMID: 35760945 DOI: 10.1038/s42003-022-03549-9

Abstact

The stressosome is a pseudo-icosahedral megadalton bacterial stress-sensing protein complex consisting of several copies of two STAS-domain proteins, RsbR and RsbS, and the kinase RsbT. Upon perception of environmental stress multiple copies of RsbT are released from the surface of the stressosome. Free RsbT activates downstream proteins to elicit a global cellular response, such as the activation of the general stress response in Gram-positive bacteria. The molecular events triggering RsbT release from the stressosome surface remain poorly understood. Here we present the map of Listeria innocua RsbR1/RsbS complex at resolutions of 3.45 Å for the STAS domain core in icosahedral symmetry and of 3.87 Å for the STAS domain and N-terminal sensors in D2 symmetry, respectively. The structure reveals a conformational change in the STAS domain linked to phosphorylation in RsbR. Docking studies indicate that allosteric RsbT binding to the conformationally flexible N-terminal sensor domain of RsbR affects the affinity of RsbS towards RsbT. Our results bring to focus the molecular events within the stressosome complex and further our understanding of this ubiquitous signaling hub.

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Primary Citation of related structures