NMR analyses on the interactions of the yeast Tim50 C-terminal region with the presequence and Tim50 core domain

FEBS Lett. 2014 Mar 3;588(5):678-84. doi: 10.1016/j.febslet.2013.12.037. Epub 2014 Jan 23.

Abstract

The mitochondrial targeting signal in the presequence of mitochondrial precursor proteins is recognized by Tom20 and subsequently by Tim50 in mitochondria. Yeast Tim50 contains two presequence binding sites in the conserved core domain and in the fungi-specific C-terminal presequence binding domain (PBD). We report the NMR analyses on interactions of a shorter variant of PBD (sPBD), a shorter variant of PBD, with presequences. The presequence is recognized by sPBD in a similar manner to Tom20. sPBD can also bind to the core domain of Tim50 through the presequence binding region, which could promote transfer of the presequence from sPBD to the core domain in Tim50.

Keywords: NMR; Presequence recognition; Tim50; Tom20; Yeast.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Amino Acid Substitution
  • Binding Sites
  • Hydrophobic and Hydrophilic Interactions
  • Magnetic Resonance Spectroscopy
  • Mitochondrial Membrane Transport Proteins / chemistry*
  • Mitochondrial Membrane Transport Proteins / genetics
  • Molecular Sequence Data
  • Protein Binding
  • Protein Interaction Domains and Motifs
  • Protein Interaction Mapping
  • Protein Sorting Signals
  • Saccharomyces cerevisiae Proteins / chemistry*
  • Saccharomyces cerevisiae Proteins / genetics
  • Saccharomyces cerevisiae*

Substances

  • Mitochondrial Membrane Transport Proteins
  • Protein Sorting Signals
  • Saccharomyces cerevisiae Proteins
  • TIM50 protein, S cerevisiae