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- * Tubulin-beta mRNA autoregulation signal *
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-
- The stability of beta-tubulin mRNAs are autoregulated by their own translation
- product [1]. Unpolymerized tubulin subunits bind directly (or activate a
- factor(s) which binds co-translationally) to the nascent N-terminus of beta-
- tubulin. This binding is transduced through the adjacent ribosomes to activate
- an RNAse that degrades the polysome-bound mRNA. The recognition element has
- been shown to be the first four amino acids of beta-tubulin: Met-Arg-Glu-Ile.
- Mutations to this sequence abolish the autoregulation effect (except for the
- replacement of Glu by Asp); transposition of this sequence to an internal
- region of a polypeptide also suppresses the autoregulatory effect.
-
- -Consensus pattern: <M-R-[DE]-[IL]
- -Sequences known to belong to this class detected by the pattern: ALL, except
- for soybean beta-2 tubulin which has Ser in the last position of the pattern.
- -Other sequence(s) detected in SWISS-PROT: a number of alpha-tubulins, as well
- as 9 other proteins.
- -Last update: May 1991 / Pattern and text revised.
-
- [ 1] Cleveland D.W.
- Trends Biochem. Sci. 13:339-343(1988).
-