Crystallization and preliminary X-ray analysis of mitochondrial presequence receptor Tom20 in complexes with a presequence from aldehyde dehydrogenase

Mayumi Igura, Toyoyuki Ose, Takayuki Obita, Chiaki Sato, Katsumi Maenaka, Toshiya Endo, Daisuke Kohda

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Most mitochondrial proteins are synthesized in the cytosol and must be imported into the mitochondria. Many mitochondrial precursor proteins have an extra leader sequence at their N-terminus called a presequence. Presequences are recognized by the Tom20 receptor protein. Based on the previously determined NMR structure of rat Tom20, a fragment corresponding to the core structure was generated. A cysteine residue was added at the C-terminus of the rat aldehyde dehydrogenase presequence to fix the presequence peptide onto the Tom20 fragment via an intermolecular disulfide bond. Two crystal forms of the complex were successfully obtained with different designs of the linker sequence which diffracted to 2.1 and 1.9Å. Crystal dehydration and subsequent annealing was essential to obtain good diffraction data for the 2.1Å crystal form.

Original languageEnglish
Pages (from-to)514-517
Number of pages4
JournalActa Crystallographica Section F: Structural Biology and Crystallization Communications
Volume61
Issue number5
DOIs
Publication statusPublished - 2005

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Genetics
  • Condensed Matter Physics

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