Structural analysis of YjcS. (A) Overview of the YjcS homodimer as a cartoon. Monomers are presented in cyan and in light pink. (B) A cartoon representation of a YjcS monomer. Secondary structure elements in this monomer are indicated and three structural domains, the N-terminal domain, the dimerization domain and the C-terminal domain, are also marked. (C) The hydrophobic channel formed by the C-terminal domain. The hydrophobic residues in the C-terminal domain and the residues, assumed to bind zinc and the sulfate group, are presented as sticks. (D) The interaction interface between the N-terminal domain and the C-terminal domain. The residues, forming hydrogen bonds, are presented as sticks and the hydrogen bonds are indicated by the dotted lines.