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- ********************************************************
- * Ergosterol biosynthesis ERG4/ERG24 family signatures *
- ********************************************************
-
- Two fungal enzymes which are involved in ergosterol biosynthesis and which act
- by reducing double bonds in precursors of ergosterol have been shown to be
- evolutionary related [1]. These enzymes are C-14 sterol reductase (gene ERG24)
- and C-24(28) sterol reductase (gene ERG4 in budding yeast and sts1 in fission
- yeast). The sequences of these enzymes are also highly related to that of
- chicken lamin B receptor, which is thought to anchor the lamina to the inner
- nuclear membrane.
-
- These proteins are highly hydrophobic and seem to contain seven or eight
- transmembrane regions. As signature patterns, we selected two conserved
- regions. The first one is apparently located in a loop between the fourth and
- fifth transmembrane regions and the second is at the C-terminal section.
-
- -Consensus pattern: G-x(2)-[LIVM]-Y-D-x-F-x-G-x(2)-L-N-P-R-x-G
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: [LIVM](2)-H-R-x(2)-R-D-x(3)-C-[KR]-x-K-Y-G
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Last update: June 1994 / First entry.
-
- [ 1] Lai M.H., Bard M., Pierson C.A., Alexander J.F., Goebl M., Carter G.T.,
- Kirsch D.R.
- Gene 140:41-49(1994).
-