2LGQ

Human C30S/C59S-Cox17 mutant

Summary for 2LGQ

• Entry DOI: 10.2210/pdb2lgq/pdb
• Related: 2rn9
• NMR Information: BMRB: 17821
• Descriptor: Cytochrome c oxidase copper chaperone (1 entity in total)
• Functional Keywords: mitochondrial protein, copper chaperone, ims, cytochrome c oxidase, metal transport
• Biological source: Homo sapiens (human)
• Cellular location: Mitochondrion intermembrane space (By similarity): Q14061
• Total number of polymer chains: 1
• Total formula weight: 7288.43

Authors

Bertini, I.,Ciofi-Baffoni, S.,Gallo, A. (deposition date: 2011-08-01, release date: 2011-08-17, Last modification date: 2024-11-20)

Primary citation

Banci, L.,Bertini, I.,Cefaro, C.,Ciofi-Baffoni, S.,Gallo, A.
Functional role of two interhelical disulfide bonds in human cox17 protein from a structural perspective.
J.Biol.Chem., 286:34382-34390, 2011

PubMed Abstract: Human Cox17 is the mitochondrial copper chaperone responsible for supplying copper ions, through the assistance of Sco1, Sco2, and Cox11, to cytochrome c oxidase, the terminal enzyme of the mitochondrial energy-transducing respiratory chain. It consists of a coiled coil-helix-coiled coil-helix domain stabilized by two disulfide bonds and binds one copper(I) ion through a Cys-Cys motif. Here, the structures and the backbone mobilities of two Cox17 mutated forms with only one interhelical disulfide bond have been analyzed. It appears that the inner disulfide bond (formed by Cys-36 and Cys-45) stabilizes interhelical hydrophobic interactions, providing a structure with essentially the same structural dynamic properties of the mature Cox17 state. On the contrary, the external disulfide bond (formed by Cys-26 and Cys-55) generates a conformationally flexible α-helical protein, indicating that it is not able to stabilize interhelical packing contacts, but is important for structurally organizing the copper-binding site region.

PubMed: 21816817
DOI: 10.1074/jbc.M111.246223

Experimental method

SOLUTION NMR