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- ********************************
- * Peripherin / rom-1 signature *
- ********************************
-
- Peripherin (or RDS) and rom-1 are related retinal-specific integral membrane
- proteins which are located at the rims of the photoreceptor disks, where they
- may act jointly in disk morphogenesis [1]. Both peripherin and rom-1 form
- disulfide-linked homodimers.
-
- Defects in the peripherin gene (RDS) cause various Human diseases such as
- autosomal dominant retinitis pigmentosa, autosomal dominant punctata albescens
- and butterfly-shaped pigment dystrophy. In mice it causes retinopathy known as
- 'retinal degeneration slow' (rds).
-
- These proteins contain about 350 amino acid residues. Structurally they
- consist of a short cytoplasmic N-terminal domain, followed by four
- transmembrane segments that delimit two lumenal and one cytoplasmic loops; the
- C-terminal domain is cytoplasmic. The second lumenal loop is very large (about
- 140 amino acid residues) and contains seven conserved cysteines. The schematic
- representation of this structure is shown below.
-
- NH2-*** ************-COOH
- * * * * *
- * * * * Cytoplasmic
- ---* ----* ----*-------*----------------
- * * * * Membrane
- * * * *
- ---* ----* ----*-------*----------------
- * * * * Lumenal
- * * * * *
- * *
- * *
- * *
- *
-
- As a signature pattern we selected a region of 16 residues which is almost
- perfectly conserved. This region is located in the large lumenal loop and it
- contains three of the seven conserved cysteines.
-
- -Consensus pattern: D-G-V-P-F-S-C-C-N-P-x-S-P-R-P-C
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: October 1993 / First entry.
-
- [ 1] Bascom R.A., Manara S., Collins L., Molday R.S., Kalnins V.I.,
- McInnes R.R.
- Neuron 8:1171-1184(1992).
-