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PDOC00633
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1995-07-26
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* 14-3-3 proteins signatures *
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The 14-3-3 proteins [1] are a family of closely related acidic homodimeric
proteins of about 30 Kd which are abundantly present in mammalian brain
tissues and located preferentially in neurons. The 14-3-3 proteins seem to
have multiple biological activities. They function as protein-kinase
dependent activators of tyrosine and tryptophan hydroxylases, which are key
enzymes in the biosynthetic pathway of neurotransmitters, such as dopamine
and serotonin, in the brain. Some of them act as inhibitors of protein
kinase C while others have been shown to have a phospholipase A2 activity on
choline and ethanolamine glycerophospholipids. In yeast a 14-3-3-like protein
(gene BMH1) is involved in growth regulation.
The 14-3-3 family of proteins are ubiquitously found in all eukaryotic species
studied and have been sequenced in fungi, plants, Drosophila, and vertebrates.
The sequences of the 14-3-3 proteins are extremely well conserved. As
signature patterns we have selected two perfectly conserved regions: the first
is a peptide of 11 residues located in the N-terminal section; the second, a
21 amino acid region located in the C-terminal section.
-Consensus pattern: R-N-L-L-S-V-A-Y-K-N-V
-Sequences known to belong to this class detected by the pattern: ALL.
-Other sequence(s) detected in SWISS-PROT: NONE.
-Consensus pattern: S-Y-K-D-S-T-L-I-M-Q-L-L-[RH]-D-N-L-T-L-W-T-[SA]
-Sequences known to belong to this class detected by the pattern: ALL.
-Other sequence(s) detected in SWISS-PROT: NONE.
-Last update: October 1993 / Patterns and text revised.
[ 1] Aitken A., Collinge D.B., van Heusden B.P.H., Isobe T., Roseboom P.H.,
Rosenfeld G., Soll J.
Trends Biochem. Sci. 17:498-501(1992).