The bacterium E. coli is the host for bacteriophage T4, and the phage encoded gp31 protein () appears to be structurally and functionally homologous to E. coli chaperone protein GroES and able to substitute for it in the assembly of bacteriophage T4 virus particles during infection. Like GroES, gp31 forms a stable complex with GroEL chaperonin that is absolutely necessary for the folding and assembly in vivo of the bacteriophage T4 major capsid protein gp23.
the bacterium e coli is the host for bacteriophage t4 and the phage encoded gp31 protein () appears to be structurally and functionally homologous to e coli chaperone protein groes and able to substitute for it in the assembly of bacteriophage t4 virus particles during infection like groes gp31 forms a stable complex with groel chaperonin that is absolutely necessary for the folding and assembly in vivo of the bacteriophage t4 major capsid protein gp23