36CQ: PhiX174 bacteriophage

Structure of the PhiX174 bacteriophage. Determined by electron microscopy at 2.76 Å resolution. Released 17 Jun 2026.

Method
Electron microscopy
Resolution
2.76 Å
Organism
Sinsheimervirus
Chains
3
Atoms
4,996
Mol. weight
71.84 kDa
Released
17 Jun 2026

Explore 36CQ in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

36CQ contains 40 α-helices and 46 β-strands across 3 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chain A: 1 helix, 1 β-strand

ElementResiduesLengthSheet
α-helix14-174
β-strand1811
Chain B: 34 helices, 29 β-strands
ElementResiduesLengthSheet
β-strand10-1452
β-strand17-2372
β-strand27-2823
β-strand29-3684
β-strand41-52122
α-helix53-542
β-strand5515
β-strand6111
α-helix62-632
β-strand64-73104
α-helix74-785
α-helix80-889
α-helix89-913
α-helix92-965
β-strand97-9936
α-helix108-1103
α-helix113-1153
β-strand119-12136
α-helix122-13514
α-helix142-1443
α-helix149-1513
α-helix154-1596
β-strand161-16223
α-helix1631
β-strand16417
α-helix165-1673
α-helix1731
β-strand17418
α-helix1751
β-strand18719
β-strand19019
α-helix193-21119
α-helix216-2227
α-helix229-2324
α-helix2351
β-strand236-24494
β-strand247-251510
α-helix2521
β-strand261-265510
β-strand266-277122
β-strand282-291104
β-strand296111
β-strand299112
α-helix302-3054
α-helix309-3102
α-helix311-3144
α-helix318-3214
α-helix325-3262
β-strand327-33048
α-helix331-3333
β-strand335112
β-strand343-34648
α-helix350-3523
α-helix356-3583
α-helix361-3633
β-strand372111
α-helix380-3845
β-strand38517
α-helix386-3872
α-helix388-3914
β-strand39515
β-strand403-416142
α-helix420-4245
Chain C: 5 helices, 16 β-strands
ElementResiduesLengthSheet
α-helix2-43
β-strand15-17313
β-strand22-23213
β-strand26114
α-helix291
β-strand30115
β-strand31114
α-helix35-362
β-strand37114
β-strand39-491113
β-strand52-611014
α-helix62-632
β-strand70-811213
β-strand88-96914
β-strand102115
β-strand107-111514
β-strand115-117313
β-strand120-1301113
β-strand139-1501214
α-helix1511
β-strand153-1631113

Molecules and chains

MoleculeChainsTypeLengthOrganismUniProt
DNA-binding protein JAprotein38SinsheimervirusP69592
Capsid protein FBprotein427SinsheimervirusP03641
Major spike protein GCprotein175SinsheimervirusA3FJA7
Sequence of entity 1 (A), FASTA
>36CQ_1 DNA-binding protein J (chains A)
MSKGKKRSGARPGRPQPLRGTKGKRKGARLWYVGGQQF
Sequence of entity 2 (B), FASTA
>36CQ_2 Capsid protein F (chains B)
MSNIQTGAERMPHDLSHLGFLAGQIGRLITISTTPVIAGDSFEMDAVGALRLSPLRRGLA
IDSTVDIFTFYVPHRHVYGEQWIKFMKDGVNATPLPTVNTTGYIDHAAFLGTINPDTNKI
PKHLFQGYLNIYNNYFKAPWMPDRTEANPNELNQDDARYGFRCCHLKNIWTAPLPPETEL
SRQMTTSTTSIDIMGLQAAYANLHTDQERDYFMQRYHDVISSFGGKTSYDADNRPLLVMR
SNLWASGYDVDGTDQTSLGQFSGRVQQTYKHSVPRFFVPEHGTMFTLALVRFPPTATKEI
QYLNAKGALTYTDIAGDPVLYGNLPPREISMKDVFRSGDSSKKFKIAEGQWYRYAPSYVS
PAYHLLEGFPFIQEPPSGDLQERVLIRHHDYDQCFQSVQLLQWNSQVKFNVTVYRNLPTT
RDSIMTS
Sequence of entity 3 (C), FASTA
>36CQ_3 Major spike protein G (chains C)
MFQTFISRHNSNFFSDKLVLTSVTPASSAPVLQTPKATSSTLYFDSLTVNAGNGGFLHCI
QMDTSVNAANQVVSVGADIAFDADPKFFACLVRFESSSVPTTLPTAYDVYPLDGRHDGGY
YTVKDCVTIDVLPRTPGNNVYVGFMVWSNFTATKCRGLVSLNQVIKEIICLQPLK

Primary citation

Generative design of bacteriophages with genome language models. King, S.H., Driscoll, C.L., Li, D.B. et al. Science (2026) 393:eaec2657-eaec2657. DOI 10.1126/science.aec2657 · PubMed

Other PDB entries of the same protein (UniProt P69592), best resolution first:

Browse structure collections

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