Protein metalation in a nutshell.
Protein metalation in a nutshell.
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DOI:
10.1002/1873-3468.14500
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发表时间:
2023-01
期刊:
影响因子:
3.5
通讯作者:
Robinson, Nigel J.
中科院分区:
文献类型:
--
作者:
Osman, Deenah;Robinson, Nigel J.
Metalation, the acquisition of metals by proteins, must avoid mis‐metalation with tighter binding metals. This is illustrated by four selected proteins that require different metals: all show similar ranked orders of affinity for bioavailable metals, as described in a universal affinity series (the Irving–Williams series). Crucially, cellular protein metalation occurs in competition with other metal binding sites. The strength of this competition defines the intracellular availability of each metal: its magnitude has been estimated by calibrating a cells' set of DNA‐binding, metal‐sensing, transcriptional regulators. This has established that metal availabilities (as free energies for forming metal complexes) are maintained to the inverse of the universal series. The tightest binding metals are least available. With these availabilities, correct metalation is achieved. Metalation of proteins is logical within defined intracellular metal availabilities. Mis‐metalation is avoided because weaker binding metals are more available than tighter binding ones.
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