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- *********************************************************
- * Elongation factor 1 beta/beta'/delta chain signatures *
- *********************************************************
-
- Eukaryotic elongation factor 1 (EF-1) is responsible for the GTP-dependent
- binding of aminoacyl-tRNAs to the ribosomes [1]. EF-1 is composed of four
- subunits: the alpha chain which binds GTP and aminoacyl-tRNAs, the gamma
- chain that probably plays a role in anchoring the complex to other cellular
- components and the beta and delta (or beta') chains. The beta and delta chains
- are highly similar proteins that both stimulate the exchange of GDP bound to
- the alpha chain for GTP [2]. The beta and delta chains are hydrophilic
- proteins of around 23 to 31 Kd. Their C-terminal part seems important for the
- nucleotide exchange activity, while the N-terminal section is probably
- involved in the interaction with the gamma chain.
-
- We have developed two signature patterns for this family of proteins. The
- first corresponds to an acidic region in the central section; the second, to
- the C-terminal extremity of these proteins
-
- -Consensus pattern: [DE]-[DEG]-[DE](2)-[LIVMF]-D-L-F-G
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: V-Q-S-x-D-[LIVM]-x-A-[FWM]-[NQ]-K-[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: Amons R.
- wmbamons@rulgl.leidenuniv.nl
-
- -Last update: June 1994 / Patterns and text revised.
-
- [ 1] Riis B., Rattan I.S., Clark B.F.C., Merrick W.C.
- Trends Biochem. Sci. 15:420-424(1990).
- [ 2] van Damme H.T.F., Amons R., Karssies R., Timmers C.J., Janssen G.M.C.,
- Moeller W.
- Biochim. Biophys. Acta 1050:241-247(1990).
-