wwPDB validation report of PDB entry 3FOI

Six gp18 subunits form one disk of the tail sheath. 23 disks form a bacteriophage T4 tail. During infection the tail sheath subunits change their relative positions resulting in the contraction of the tail sheath.
one disk of the tail sheath in the contracted conformation

six gp18M fitted into one disk of the tail sheath in the contracted conformation
deletion mutant gp18M: UNP Residues 1-510

Crystal structure of bacteriophage T4 tail sheath protein, deletion mutant gp18M, that was used for the fitting

Crystal structure of the protease resistant fragment of bacteriophage T4 tail sheath protein, gp18PR (small fragment of the tail sheath protein)

3D cryo-EM map of the bacteriophage T4 tail sheath protein in the contracted conformation that was used in fitting

Fitting of gp18M crystal structure into 3D cryo-EM reconstruction of extended conformation of bacteriophage T4 tail sheath protein

AUTHORS STATE THAT THE SEQUENCE COMPLETELY AGREES WITH THE GENBANK ENTRY AAA32541, PUBMED REPORT 2964531. THE SEQUENCE DIFFERENCES MAY REFLECT THE SEQUENCE VARIATION BETWEEN THE VIRUS STRAINS.

Fitting of gp18M crystal structure into 3D cryo-EM reconstruction of bacteriophage T4 contracted tail

geometric validation package for ligand chemistry in protein x-ray structures
20191225.v01 (using entries in the PDB archive December 25th 2019)