1RJU

Crystal structure of a truncated form of yeast copper thionein

Summary for 1RJU

• Entry DOI: 10.2210/pdb1rju/pdb
• Related: 1FMY
• Descriptor: Metallothionein, COPPER (I) ION (3 entities in total)
• Functional Keywords: yeast cu(i) metallothionein, cu(i) metallothionein fragments, cu(i)-thiolate, metal binding protein
• Total number of polymer chains: 1
• Total formula weight: 4355.63

Authors

Calderone, V.,Dolderer, B.,Hartmann, H.J.,Echner, H.,Luchinat, C.,Del Bianco, C.,Mangani, S.,Weser, U. (deposition date: 2003-11-20, release date: 2004-12-07, Last modification date: 2024-02-14)

Primary citation

Calderone, V.,Dolderer, B.,Hartmann, H.J.,Echner, H.,Luchinat, C.,Del Bianco, C.,Mangani, S.,Weser, U.
The Crystal Structure of Yeast Copper Thionein: the solution of a long lasting Enigma.
Proc.Natl.Acad.Sci.USA, 102:51-56, 2005

PubMed Abstract: We report here the crystal structure of yeast copper thionein (Cu-MT), determined at 1.44-A resolution. The Cu-MT structure shows the largest known oligonuclear Cu(I) thiolate cluster in biology, consisting of six trigonally and two digonally coordinated Cu(I) ions. This is at variance with the results from previous spectroscopic determinations, which were performed on MT samples containing seven rather than eight metal ions. The protein backbone has a random coil structure with the loops enfolding the copper cluster, which is located in a cleft where it is bound to 10 cysteine residues. The protein structure is somewhat different from that of Ag(7)-MT and similar, but not identical, to that of Cu(7)-MT. Besides the different structure of the metal cluster, the main differences lie in the cysteine topology and in the conformation of some portions of the backbone. The present structure suggests that Cu-MT, in addition to its role as a safe depository for copper ions in the cell, may play an active role in the delivery of copper to metal-free chaperones.

PubMed: 15613489
DOI: 10.1073/pnas.0408254101

Experimental method

X-RAY DIFFRACTION (1.44 Å)