2ZA8
recombinant horse L-chain apoferritin N-terminal deletion mutant (residues 1-8)
Summary for 2ZA8
| Entry DOI | 10.2210/pdb2za8/pdb |
| Related | 2ZA6 2ZA7 |
| Descriptor | Ferritin light chain, CADMIUM ION (3 entities in total) |
| Functional Keywords | ferric iron binding, acetylation, iron storage, metal-binding, metal binding protein |
| Biological source | Equus caballus (horse) |
| Total number of polymer chains | 1 |
| Total formula weight | 19266.33 |
| Authors | Yamashita, I.,Mishima, Y.,Park, S.-Y.,Heddle, J.G.,Tame, J.R.H. (deposition date: 2007-10-02, release date: 2008-01-22, Last modification date: 2023-11-01) |
| Primary citation | Yoshizawa, K.,Mishima, Y.,Park, S.-Y.,Heddle, J.G.,Tame, J.R.H.,Iwahori, K.,Kobayashi, M.,Yamashita, I. Effect of N-terminal Residues on the Structural Stability of Recombinant Horse L-chain Apoferritin in an Acidic Environment J.BIOCHEM.(TOKYO), 142:707-713, 2007 Cited by PubMed Abstract: The denaturation of recombinant horse L-chain apoferritin (rLF), which is composed of 24 L-chain subunits, in acidic solution was studied. Using two rLF mutants, lacking four (Fer4) or eight (Fer8) N-terminal amino acid residues, the effect of N-terminal residues on the protein's stability was investigated. Of the two mutants and wild-type rLF, the tertiary and secondary structures of Fer8 were found to be most sensitive to an acidic environment. The Fer8 protein dissociated easily into subunit dimers at or below pH 2.0. Comparing the crystal structures of the mutant proteins, deletion of the N-terminal residues was found to result in fewer inter- and intra-subunit hydrogen bonds. The loss of these bonds is assumed to be responsible for lower endurance against acidic denaturation in N-terminus-deleted mutants. These results indicated that the inter- and intra-subunit hydrogen bonds of N-terminal residues affect the denaturation, especially oligomer formation of apoferritin subunits and will be of use in designing ferritin-based nanodevices. PubMed: 17938140DOI: 10.1093/jb/mvm187 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.4 Å) |
Structure validation
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