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Structure of porin refined at 1.8 A resolution

M S Weiss1, G E Schulz

  • 1Institut für Organische Chemie und Biochemie der Universität, Freiburg, Germany.

Journal of Molecular Biology
|September 20, 1992
PubMed

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Mitochondria, chloroplasts, and gram-negative bacteria have transmembrane, beta-barrel proteins called porins to mediate the free diffusion of ions and metabolites across the membrane. Mitochondrial porin precursors contain conserved amino acid sequences called beta signals at their C-terminal. Beta signals have a  motif of PoXGXXHyXHy (Po-Polar, X-Any amino acid, G-Glycine, Hy-LargeHydrophobic), which are crucial for precursor recognition to initiate precursor assembly. Beta-barrel precursors...