1tja
From Proteopedia
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Fitting of gp8, gp9, and gp11 into the cryo-EM reconstruction of the bacteriophage T4 contracted tail
Overview
The contractile tail of bacteriophage T4 undergoes major structural, transitions when the virus attaches to the host cell surface. The, baseplate at the distal end of the tail changes from a hexagonal to a star, shape. This causes the sheath around the tail tube to contract and the, tail tube to protrude from the baseplate and pierce the outer cell, membrane and the cell wall before reaching the inner cell membrane for, subsequent viral DNA injection. Analogously, the T4 tail can be contracted, by treatment with 3 M urea. The structure of the T4 contracted tail, including the head-tail joining region, has been determined by, cryo-electron microscopy to 17 A resolution. This 1200 A-long, 20 MDa, structure has been interpreted in terms of multiple copies of its, approximately 20 component proteins. A comparison with the metastable, hexagonal baseplate of the mature virus shows that the baseplate proteins, move as rigid bodies relative to each other during the structural change.
About this Structure
1TJA is a Protein complex structure of sequences from Bacteriophage t4. Full crystallographic information is available from OCA.
Reference
Three-dimensional rearrangement of proteins in the tail of bacteriophage T4 on infection of its host., Leiman PG, Chipman PR, Kostyuchenko VA, Mesyanzhinov VV, Rossmann MG, Cell. 2004 Aug 20;118(4):419-29. PMID:15315755
Page seeded by OCA on Wed Nov 21 03:19:05 2007
Categories: Bacteriophage t4 | Protein complex | Chipman, P.R. | Kostyuchenko, V.A. | Leiman, P.G. | Mesyanzhinov, V.V. | Rossmann, M.G. | Cryo-em | Docking | Fitting | Gp11 | Gp8 | Gp9
