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- ***********************
- * Arrestins signature *
- ***********************
-
- Arrestin (or S-antigen) [1] is a protein that interacts with light-activated
- phosphorylated rhodopsin thereby inhibiting or 'arresting' its ability to
- interact with transducin. In mammals, arrestin is associated with autoimmune
- uveitis.
-
- Arrestin belongs to a family of closely related proteins including:
-
- - Beta-arrestin-1 and -2, proteins that regulate the function of beta-
- adrenergic receptors. They bind to the phosphorylated form of the latter
- thereby causing a significant impairment of their capacity to activate G(S)
- proteins.
- - Cone photoreceptors C-arrestin (arrestin-X) [2].
- - Phosrestins I and II from Drosophila. These proteins undergo light-induced
- phosphorylation and probably play an important role in photoreceptor
- transduction.
-
- Sequence comparison of proteins from the arrestin family shows a high level of
- conservation. As a signature pattern, we selected a region located in the N-
- terminal section that contains many charged and hydrophobic residues.
-
- -Consensus pattern: [FY]-R-Y-G-x-[DE](2)-x-[DE]-[LIVM](2)-G-[LIVM]-x-F-x-[RK]-
- [DE]-[LIVM]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Expert(s) to contact by email: Kolakowski L.F. Jr.
- lfk@receptor.mgh.harvard.edu
-
- -Last update: June 1994 / Text revised.
-
- [ 1] Wilson C.J., Applebury M.L.
- Curr. Biol. 3:683-686(1993).
- [ 2] Craft C.M., Whitmore D.H., Wiechmann A.F.
- J. Biol. Chem. 269:4613-4619(1994).
-