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Basic information
Entry | Database: PDB / ID: 2fs3 | |||||||||
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Title | Bacteriophage HK97 K169Y Head I | |||||||||
![]() | Major capsid protein | |||||||||
![]() | VIRUS / Bacteriophage / HK97 / capsid / expansion intermediate / icosahedral VIRUS | |||||||||
Function / homology | Phage capsid / Phage capsid family / viral procapsid maturation / T=7 icosahedral viral capsid / viral capsid / identical protein binding / Major capsid protein![]() | |||||||||
Biological species | ![]() | |||||||||
Method | ![]() ![]() ![]() | |||||||||
![]() | Gan, L. / Speir, J.A. / Conway, J.F. / Lander, G. / Cheng, N. / Firek, B.A. / Hendrix, R.W. / Duda, R.L. / Liljas, L. / Johnson, J.E. | |||||||||
![]() | ![]() Title: Capsid conformational sampling in HK97 maturation visualized by X-ray crystallography and cryo-EM. Authors: Lu Gan / Jeffrey A Speir / James F Conway / Gabriel Lander / Naiqian Cheng / Brian A Firek / Roger W Hendrix / Robert L Duda / Lars Liljas / John E Johnson / ![]() Abstract: Maturation of the bacteriophage HK97 capsid from a precursor (Prohead II) to the mature state (Head II) involves a 60 A radial expansion. The mature particle is formed by 420 copies of the major ...Maturation of the bacteriophage HK97 capsid from a precursor (Prohead II) to the mature state (Head II) involves a 60 A radial expansion. The mature particle is formed by 420 copies of the major capsid protein organized on a T = 7 laevo lattice with each subunit covalently crosslinked to two neighbors. Well-characterized pH 4 expansion intermediates make HK97 valuable for investigating quaternary structural dynamics. Here, we use X-ray crystallography and cryo-EM to demonstrate that in the final transition in maturation (requiring neutral pH), pentons in Expansion Intermediate IV (EI-IV) reversibly sample 14 A translations and 6 degrees rotations relative to a fixed hexon lattice. The limit of this trajectory corresponds to the Head II conformation that is secured at this extent only by the formation of the final class of covalent crosslinks. Mutants that cannot crosslink or EI-IV particles that have been rendered incapable of forming the final crosslink remain in the EI-IV state. | |||||||||
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 331.2 KB | Display | ![]() |
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PDB format | ![]() | 275.3 KB | Display | ![]() |
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-Validation report
Summary document | ![]() | 435.4 KB | Display | ![]() |
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Full document | ![]() | 474 KB | Display | |
Data in XML | ![]() | 40.6 KB | Display | |
Data in CIF | ![]() | 58.4 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 2frpC ![]() 2fsyC ![]() 2ft1C ![]() 2fteC ![]() 1ohgS C: citing same article ( S: Starting model for refinement |
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Similar structure data |
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Assembly
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Symmetry | Point symmetry: (Hermann–Mauguin notation: 532 / Schoenflies symbol: I (icosahedral)) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Noncrystallographic symmetry (NCS) | NCS oper:
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