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- EMDB-41819: In situ cryo-EM structure of bacteriophage P22 tailspike protein ... -

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Basic information

Entry
Database: EMDB / ID: EMD-41819
TitleIn situ cryo-EM structure of bacteriophage P22 tailspike protein complex at 3.4A resolution
Map data
Sample
  • Virus: Salmonella phage P22 (virus)
    • Protein or peptide: Tail spike protein
KeywordsTailspike protein / TSP / STRUCTURAL PROTEIN / VIRAL PROTEIN / gene product 9 (gp9)
Function / homology
Function and homology information


endo-1,3-alpha-L-rhamnosidase activity / symbiont entry into host cell via disruption of host cell envelope lipopolysaccharide / virus tail, fiber / symbiont entry into host cell via disruption of host cell envelope / symbiont entry into host / Hydrolases; Glycosylases; Glycosidases, i.e. enzymes that hydrolyse O- and S-glycosyl compounds / adhesion receptor-mediated virion attachment to host cell / metabolic process / virion attachment to host cell
Similarity search - Function
P22 tailspike C-terminal domain / Salmonella phage P22 tail-spike / Bacteriophage P22 tailspike, N-terminal / Phage P22 tailspike-like, N-terminal domain superfamily / Head binding / Autotransporter, pectate lyase C-like domain superfamily / Pectin lyase fold/virulence factor
Similarity search - Domain/homology
Biological speciesSalmonella phage P22 (virus)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsIglesias SM / Feng-Hou C / Cingolani G
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Cancer Institute (NIH/NCI)GM140733 United States
CitationJournal: J Mol Biol / Year: 2023
Title: Molecular Architecture of Salmonella Typhimurium Virus P22 Genome Ejection Machinery.
Authors: Stephano M Iglesias / Ravi K Lokareddy / Ruoyu Yang / Fenglin Li / Daniel P Yeggoni / Chun-Feng David Hou / Makayla N Leroux / Juliana R Cortines / Justin C Leavitt / Mary Bird / Sherwood R ...Authors: Stephano M Iglesias / Ravi K Lokareddy / Ruoyu Yang / Fenglin Li / Daniel P Yeggoni / Chun-Feng David Hou / Makayla N Leroux / Juliana R Cortines / Justin C Leavitt / Mary Bird / Sherwood R Casjens / Simon White / Carolyn M Teschke / Gino Cingolani /
Abstract: Bacteriophage P22 is a prototypical member of the Podoviridae superfamily. Since its discovery in 1952, P22 has become a paradigm for phage transduction and a model for icosahedral viral capsid ...Bacteriophage P22 is a prototypical member of the Podoviridae superfamily. Since its discovery in 1952, P22 has become a paradigm for phage transduction and a model for icosahedral viral capsid assembly. Here, we describe the complete architecture of the P22 tail apparatus (gp1, gp4, gp10, gp9, and gp26) and the potential location and organization of P22 ejection proteins (gp7, gp20, and gp16), determined using cryo-EM localized reconstruction, genetic knockouts, and biochemical analysis. We found that the tail apparatus exists in two equivalent conformations, rotated by ∼6° relative to the capsid. Portal protomers make unique contacts with coat subunits in both conformations, explaining the 12:5 symmetry mismatch. The tail assembles around the hexameric tail hub (gp10), which folds into an interrupted β-propeller characterized by an apical insertion domain. The tail hub connects proximally to the dodecameric portal protein and head-to-tail adapter (gp4), distally to the trimeric tail needle (gp26), and laterally to six trimeric tailspikes (gp9) that attach asymmetrically to gp10 insertion domain. Cryo-EM analysis of P22 mutants lacking the ejection proteins gp7 or gp20 and biochemical analysis of purified recombinant proteins suggest that gp7 and gp20 form a molecular complex associated with the tail apparatus via the portal protein barrel. We identified a putative signal transduction pathway from the tailspike to the tail needle, mediated by three flexible loops in the tail hub, that explains how lipopolysaccharide (LPS) is sufficient to trigger the ejection of the P22 DNA in vitro.
History
DepositionSep 1, 2023-
Header (metadata) releaseNov 29, 2023-
Map releaseNov 29, 2023-
UpdateMar 13, 2024-
Current statusMar 13, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_41819.png

Downloads & links

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Map

FileDownload / File: emd_41819.map.gz / Format: CCP4 / Size: 325 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.16582 Å
Density
Contour LevelBy AUTHOR: 0.137
Minimum - Maximum-0.050026078 - 2.1165433
Average (Standard dev.)0.0049251923 (±0.044176865)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions440440440
Spacing440440440
CellA=B=C: 512.9599 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_41819_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_41819_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_41819_half_map_2.map
Projections & Slices
AxesZYX

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Slices (1/2)
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Histogram

Histogram (log scale)

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Sample components

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Entire : Salmonella phage P22

EntireName: Salmonella phage P22 (virus)
Components
  • Virus: Salmonella phage P22 (virus)
    • Protein or peptide: Tail spike protein

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Supramolecule #1: Salmonella phage P22

SupramoleculeName: Salmonella phage P22 / type: virus / ID: 1 / Parent: 0 / Macromolecule list: all / NCBI-ID: 2908168 / Sci species name: Salmonella phage P22 / Virus type: VIRION / Virus isolate: OTHER / Virus enveloped: No / Virus empty: No
Host (natural)Organism: Salmonella enterica (bacteria)

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Macromolecule #1: Tail spike protein

MacromoleculeName: Tail spike protein / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO
EC number: Hydrolases; Glycosylases; Glycosidases, i.e. enzymes that hydrolyse O- and S-glycosyl compounds
Source (natural)Organism: Salmonella phage P22 (virus)
Molecular weightTheoretical: 71.923523 KDa
SequenceString: MTDITANVVV SNPRPIFTES RSFKAVANGK IYIGQIDTDP VNPANQIPVY IENEDGSHVQ ITQPLIINAA GKIVYNGQLV KIVTVQGHS MAIYDANGSQ VDYIANVLKY DPDQYSIEAD KKFKYSVKLS DYPTLQDAAS AAVDGLLIDR DYNFYGGETV D FGGKVLTI ...String:
MTDITANVVV SNPRPIFTES RSFKAVANGK IYIGQIDTDP VNPANQIPVY IENEDGSHVQ ITQPLIINAA GKIVYNGQLV KIVTVQGHS MAIYDANGSQ VDYIANVLKY DPDQYSIEAD KKFKYSVKLS DYPTLQDAAS AAVDGLLIDR DYNFYGGETV D FGGKVLTI ECKAKFIGDG NLIFTKLGKG SRIAGVFMES TTTPWVIKPW TDDNQWLTDA AAVVATLKQS KTDGYQPTVS DY VKFPGIE TLLPPNAKGQ NITSTLEIRE CIGVEVHRAS GLMAGFLFRG CHFCKMVDAN NPSGGKDGII TFENLSGDWG KGN YVIGGR TSYGSVSSAQ FLRNNGGFER DGGVIGFTSY RAGESGVKTW QGTVGSTTSR NYNLQFRDSV VIYPVWDGFD LGAD TDMNP ELDRPGDYPI TQYPLHQLPL NHLIDNLLVR GALGVGFGMD GKGMYVSNIT VEDCAGSGAY LLTHESVFTN IAIID TNTK DFQANQIYIS GACRVNGLRL IGIRSTDGQG LTIDAPNSTV SGITGMVDPS RINVANLAEE GLGNIRANSF GYDSAA IKL RIHKLSKTLD SGALYSHING GAGSGSAYTQ LTAISGSTPD AVSLKVNHKD CRGAEIPFVP DIASDDFIKD SSCFLPY WE NNSTSLKALV KKPNGELVRL TLATL

UniProtKB: Tail spike protein

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.5
GridModel: Quantifoil R2/1 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 15 sec. / Pretreatment - Atmosphere: OTHER / Pretreatment - Pressure: 0.015 kPa
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeTFS KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 100.0 µm / Calibrated defocus max: 2.1 µm / Calibrated defocus min: 0.8 µm / Calibrated magnification: 29000 / Illumination mode: OTHER / Imaging mode: OTHER / Cs: 2.7 mm / Nominal defocus max: 2.1 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 29000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Digitization - Dimensions - Width: 11520 pixel / Digitization - Dimensions - Height: 8184 pixel / Average electron dose: 1.08 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

2bve

Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.1.2)
Final 3D classificationNumber classes: 1 / Software - Name: RELION (ver. 3.1.2)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.1.2)
Final reconstructionNumber classes used: 1 / Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1.2) / Number images used: 38201
FSC plot (resolution estimation)

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