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Open data
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Basic information
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Title | Deconvolved phiPA3 PhuN Tetramer, p2 | |||||||||
![]() | Deconvolved map | |||||||||
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![]() | phiPA3 protein / shell protein / PhuN / phage nucleus / VIRAL PROTEIN | |||||||||
Function / homology | ![]() detection of maltose stimulus / maltose transport complex / carbohydrate transport / carbohydrate transmembrane transporter activity / maltose binding / maltose transport / maltodextrin transmembrane transport / ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing / ATP-binding cassette (ABC) transporter complex / cell chemotaxis ...detection of maltose stimulus / maltose transport complex / carbohydrate transport / carbohydrate transmembrane transporter activity / maltose binding / maltose transport / maltodextrin transmembrane transport / ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing / ATP-binding cassette (ABC) transporter complex / cell chemotaxis / outer membrane-bounded periplasmic space / host cell cytoplasm / periplasmic space / DNA damage response / membrane Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.9 Å | |||||||||
![]() | Nieweglowska ES / Brilot AF / Mendez-Moran M / Kokontis C / Baek M / Li J / Cheng Y / Baker D / Bondy-Denomy J / Agard DA | |||||||||
Funding support | ![]()
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![]() | ![]() Title: The ϕPA3 phage nucleus is enclosed by a self-assembling 2D crystalline lattice. Authors: Eliza S Nieweglowska / Axel F Brilot / Melissa Méndez-Moran / Claire Kokontis / Minkyung Baek / Junrui Li / Yifan Cheng / David Baker / Joseph Bondy-Denomy / David A Agard / ![]() Abstract: To protect themselves from host attack, numerous jumbo bacteriophages establish a phage nucleus-a micron-scale, proteinaceous structure encompassing the replicating phage DNA. Bacteriophage and host ...To protect themselves from host attack, numerous jumbo bacteriophages establish a phage nucleus-a micron-scale, proteinaceous structure encompassing the replicating phage DNA. Bacteriophage and host proteins associated with replication and transcription are concentrated inside the phage nucleus while other phage and host proteins are excluded, including CRISPR-Cas and restriction endonuclease host defense systems. Here, we show that nucleus fragments isolated from ϕPA3 infected Pseudomonas aeruginosa form a 2-dimensional lattice, having p2 or p4 symmetry. We further demonstrate that recombinantly purified primary Phage Nuclear Enclosure (PhuN) protein spontaneously assembles into similar 2D sheets with p2 and p4 symmetry. We resolve the dominant p2 symmetric state to 3.9 Å by cryo-EM. Our structure reveals a two-domain core, organized into quasi-symmetric tetramers. Flexible loops and termini mediate adaptable inter-tetramer contacts that drive subunit assembly into a lattice and enable the adoption of different symmetric states. While the interfaces between subunits are mostly well packed, two are open, forming channels that likely have functional implications for the transport of proteins, mRNA, and small molecules. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 439.7 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 14.9 KB 14.9 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 23.4 KB | Display | ![]() |
Images | ![]() | 120.4 KB | ||
Filedesc metadata | ![]() | 6.7 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8fneMC ![]() 8fv5C C: citing same article ( M: atomic model generated by this map |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||
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Annotation | Deconvolved map | ||||||||||||||||||||
Voxel size | X=Y=Z: 0.834 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
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Sample components
-Entire : Core tetramer assembly (p2) of the phiPA3 bacteriophage PhuN protein
Entire | Name: Core tetramer assembly (p2) of the phiPA3 bacteriophage PhuN protein |
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Components |
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-Supramolecule #1: Core tetramer assembly (p2) of the phiPA3 bacteriophage PhuN protein
Supramolecule | Name: Core tetramer assembly (p2) of the phiPA3 bacteriophage PhuN protein type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() |
-Macromolecule #1: Maltose/maltodextrin-binding periplasmic protein, PhuN
Macromolecule | Name: Maltose/maltodextrin-binding periplasmic protein, PhuN type: protein_or_peptide / ID: 1 / Number of copies: 8 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 110.126078 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: HHHHHHMKIE EGKLVIWING DKGYNGLAEV GKKFEKDTGI KVTVEHPDKL EEKFPQVAAT GDGPDIIFWA HDRFGGYAQS GLLAEITPD KAFQDKLYPF TWDAVRYNGK LIAYPIAVEA LSLIYNKDLL PNPPKTWEEI PALDKELKAK GKSALMFNLQ E PYFTWPLI ...String: HHHHHHMKIE EGKLVIWING DKGYNGLAEV GKKFEKDTGI KVTVEHPDKL EEKFPQVAAT GDGPDIIFWA HDRFGGYAQS GLLAEITPD KAFQDKLYPF TWDAVRYNGK LIAYPIAVEA LSLIYNKDLL PNPPKTWEEI PALDKELKAK GKSALMFNLQ E PYFTWPLI AADGGYAFKY ENGKYDIKDV GVDNAGAKAG LTFLVDLIKN KHMNADTDYS IAEAAFNKGE TAMTINGPWA WS NIDTSKV NYGVTVLPTF KGQPSKPFVG VLSAGINAAS PNKELAKEFL ENYLLTDEGL EAVNKDKPLG AVALKSYEEE LAK DPRIAA TMENAQKGEI MPNIPQMSAF WYAVRTAVIN AASGRQTVDE ALKDAQTGKP IPNPLLGLDS TENLYFQGMQ QTQQ GPKVQ TQTLQGGAGN LNSIFQRSGR TDGGDARASE ALAVFNKLKE EAIAQQDLHD DFLVFRFDRD QNRVGYSALL VVKRA AING QQVIVTRPLV MPNDQITLPT KKLTIQNGMH QETIEAEADV QDVFTTQYWN RICDSIRQQT GKHDAMVINA GPTVIP ADF DLKDELVLKQ LLIKSVNLCD DMLAKRSGEQ PFSVAMLKGT DETLAARLNF TGKPMHDSLG YPIRSDILVS LNRVKKP GQ QENEFYEAED KLNQVSCFVN LEYTPQPQQA IYGAPQQTQQ LPPLTPAIVI TDVRQAEWLK ANTMELYLFA LSNAFRVT A NQSWARSLLP QLGKVKDMRD IGAIGYLSRL AARVETKTET FTDQNFAELL YNMVRPSPVF MSDLNRFGDN AAIENVFID ALGGVNQQRA VAAIIAGVNN LIGGGFEKFF DHNTMPIIQP YGTDIQLGYY LDGEGEKQDR RDLDVLGALN ASDGNIQEWM SWYGTQCNV AVHPELRARQ SKNFDRQYLG NSVTYTTRAH RGIWNPKFIE ALDKAIASVG LTVAMDNVAQ VFGAQRFSGN L AIADYAVT GTAQVSSGLV SNGGYNPQFG VGQGSGFY UniProtKB: Maltose/maltodextrin-binding periplasmic protein, Chimallin |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | 2D array |
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Sample preparation
Buffer | pH: 6.5 Component:
Details: 0.25 cOmplete Protease Inhibitor Tablet also included | ||||||||||||||
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Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 283.15 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 67.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 105000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Initial model | Chain - Source name: AlphaFold / Chain - Initial model type: in silico model |
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Details | The initial model was generated using AlphaFold based on sequence alone. |
Refinement | Protocol: FLEXIBLE FIT |
Output model | ![]() PDB-8fne: |