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TitleCryo-EM structure of cyanopodophage Pan3 reveals a modular tail architecture for host recognition.
Journal, issue, pagesStructure, Year 2025
Publish dateDec 10, 2025
AuthorsPu Hou / Jie Zhu / Rong-Cheng Yu / Feng Yang / Kang Du / Jing Li / Wen-Wen Kong / Jie Wang / Yuxing Chen / Cong-Zhao Zhou / Yong-Liang Jiang /
PubMed AbstractCyanophages, which are bacteriophages that specifically infect host cyanobacteria, also utilize the tail to initiate host recognition and adsorption. Owing to the limited structural information on ...Cyanophages, which are bacteriophages that specifically infect host cyanobacteria, also utilize the tail to initiate host recognition and adsorption. Owing to the limited structural information on cyanophages, our understanding of the mechanism by which cyanophages specifically recognize their hosts remains largely unknown. Here, we determined the intact cryoelectron microscopy structure of a freshwater cyanopodophage Pan3, which consists of an icosahedral shell and a short tail comprising four modular components: the dodecameric adaptor, hexameric nozzle, trimeric needle, and six heterohexameric tailspikes. Notably, each tailspike features an SGNH esterase domain fused to a lectin domain, forming a continuous groove complementary to the host lipopolysaccharide. These findings provide insights into the receptor engagement in Podoviridae, and establish a structural framework for cyanophage and host interactions that may guide future antibacterial interventions against harmful blooms.
External linksStructure / PubMed:41380677
MethodsEM (single particle) / X-ray diffraction
Resolution2.6 - 3.5 Å
Structure data

65449

9vye

EMDB-65449, PDB-9vye:
Cyanopodophage Pan3 capsid
Method: EM (single particle) / Resolution: 3.2 Å

65451

9vyf

EMDB-65451, PDB-9vyf:
Cyanopodophage Pan3 portal complex
Method: EM (single particle) / Resolution: 3.3 Å

65452

9vyg

EMDB-65452, PDB-9vyg:
Cyanopodophage Pan3 tail complex
Method: EM (single particle) / Resolution: 3.5 Å

65453

9vyh

EMDB-65453, PDB-9vyh:
Cyanopodophage Pan3 tailspike
Method: EM (single particle) / Resolution: 3.5 Å

PDB-9vzi:
Cyanopodophage Pan3 Needle
Method: X-RAY DIFFRACTION / Resolution: 2.6 Å

Chemicals

ChemComp-IOD:
IODIDE ION

ChemComp-GOL:
GLYCEROL

ChemComp-HOH:
WATER

Source
  • pseudanabaena phage pan3 (virus)
KeywordsVIRUS / Cyanophage / Capsid / Major capsid protein / VIRAL PROTEIN / Portal / Tail / Adaptor / Nozzle / Needle / Tailspike

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