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- ********************************************
- * Eukaryotic mitochondrial porin signature *
- ********************************************
-
- The major protein of the outer mitochondrial membrane of eukaryotes is a
- porin that forms a voltage-dependent anion-selective channel (VDAC) that
- behaves as a general diffusion pore for small hydrophilic molecules [1,2,3].
- The channel adopts an open conformation at low or zero membrane potential and
- a closed conformation at potentials above 30-40 mV.
-
- This protein contains about 280 amino acids and its sequence is well conserved
- from fungi to mammals. As a signature pattern we selected a conserved region
- that spans positions 58 to 82.
-
- -Consensus pattern: E-x-K-x(6)-G-L-x(2)-T-x(2)-W-x(3)-N-x-L-x-T
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Note: slime mold mitochondria porin [4], while functionally similar, is not
- significantly related to this family of porins.
-
- -Last update: October 1993 / Text revised.
-
- [ 1] Manella C.A.
- Trends Biochem. Sci. 17:315-320(1992).
- [ 2] Dihanich M.
- Experientia 46:146-153(1990).
- [ 3] Forte M., Guy H.R., Mannella C.A.
- J. Bioenerg. Biomembr. 19:341-350(1987).
- [ 4] Troll H., Malchow D., Muller-Taubenberger A., Humbel B., Lottspeich F.,
- Ecke M., Gerisch G., Schmid A., Benz R.
- J. Biol. Chem. 267:21072-21079(1992).
-