5.6.1.7 | Zn2+ |
His45, Cys51, and Cys53 make up an oxidation-sensitive zinc-binding site that may donate the bound metal to a zinc acceptor. Wild-type HpGroES binds two Zn2+ per monomer, HpGroESDELTAMBD (MBD i.e. metal-binding domain) contains 0.71 per monomer. H45A, C51A, and C53A decreased to 0.3-0.5 Zn2+ per monomer. The double-cysteine mutant (C51A/C53A) gives only 0.12 Zn2+ per monomer |
713424 |