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Co-chaperone HscB tetracysteine metal binding motif This is the N-terminal domain of human co-chaperone protein HscB (hHscB). This domain is capable of binding a metal ion through its tetracysteine metal binding motif. The metal atom is coordinated by a set of four cysteine residues (Cys41, Cys44, Cys58 and Cys61) on opposed beta-hairpins. Although the N-domain lacks any recognizable secondary structure elements, it has several distant structural homologs including C-4 zinc finger domains and rubredoxin.
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