1PDP: Fitting Of Gp9 Structure Into The Bacteriophage T4 Baseplate Cryoem Reconstruction

The baseplate of bacteriophage T4 is a multiprotein molecular machine that controls host cell recognition, attachment, tail sheath contraction and viral DNA ejection. We report here the three-dimensional structure of the baseplate-tail tube complex determined to a resolution of 12 A by cryoelectron microscopy. The baseplate has a six-fold symmetric, dome-like structure approximately 520 A in diameter and approximately 270 A long, assembled around a central hub. A 940 A-long and 96 A-diameter tail tube, coaxial with the hub, is connected to the top of the baseplate. At the center of the dome is a needle-like structure that was previously identified as a cell puncturing device. We have identified the locations of six proteins with known atomic structures, and established the position and shape of several other baseplate proteins. The baseplate structure suggests a mechanism of baseplate triggering and structural transition during the initial stages of T4 infection.
PDB ID: 1PDPDownload
MMDB ID: 23778
PDB Deposition Date: 2003/5/19
Updated in MMDB: 2012/10
Experimental Method:
electron microscopy
Resolution: 12  Å
Source Organism:
Similar Structures:
Biological Unit for 1PDP: octadecameric; determined by author
Molecular Components in 1PDP
Label Count Molecule
Proteins (18 molecules)
Baseplate Structural Protein GP9(Gene symbol: 9)
Molecule annotation
* Click molecule labels to explore molecular sequence information.

Citing MMDB