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1ufp
From Proteopedia
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Crystal Structure of an Artificial Metalloprotein:Fe(III)(3,3'-Me2-salophen)/apo-wild type Myoglobin
Overview
Apo-myoglobin (apo-Mb) and apo-A71GMb were successfully reconstituted with FeIII(salophen) (1) (salophen = N,N'-bis(salicylidene)-1,2-phenilenediamine), Fe(III)(3,3'-Me2-salophen) (2), and FeIII(5,5'-t-Bu2-salophen) (3). The crystal structure of 2.apo-A71GMb shows the tight binding of the complex in the Mb cavity, while in wild-type apo-Mb it is highly disordered due to the steric repulsion with Ala71. Furthermore, the structure of 2.apo-A71GMb suggests a possible accommodation of a small substrate in the cavity. In fact, the cyanide association rate constant of 2.apo-A71GMb is 216-fold larger compared to that of 2.apo-Mb. These results provide us principles for the noncovalent fixation of synthetic metal cofactors at the desired positions in protein matrixes.
About this Structure
1UFP is a Single protein structure of sequence from Physeter catodon with as ligand. Full crystallographic information is available from OCA.
Reference
Crystal structures of artificial metalloproteins: tight binding of FeIII(Schiff-Base) by mutation of Ala71 to Gly in apo-myoglobin., Ueno T, Ohashi M, Kono M, Kondo K, Suzuki A, Yamane T, Watanabe Y, Inorg Chem. 2004 May 3;43(9):2852-8. PMID:15106972
Page seeded by OCA on Thu Feb 21 15:24:00 2008
Categories: Physeter catodon | Single protein | Kondo, K. | Kono, M. | Ohashi, M. | Suzuki, A. | Ueno, T. | Watanabe, Y. | Yamane, T. | PO4 | Iron | Metalloprotein | Myoglobin | Salophen | Schiff base
