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- ***********************************************
- * 'Homeobox' engrailed-type protein signature *
- ***********************************************
-
- Most proteins which contain a 'homeobox' domain can be classified [1,2], on
- the basis of their sequence characteristics, in three subfamilies: engrailed,
- antennapedia and paired. Proteins currently known to belong to the engrailed
- subfamily are:
-
- - Drosophila segmentation polarity protein engrailed (en) which specifies the
- body segmentation pattern and is required for the development of the
- central nervous system.
- - Drosophila invected protein (inv).
- - Silk moth proteins engrailed and invected, which may be involved in the
- compartmentalization of the silk gland.
- - Honeybee E30 and E60.
- - Grasshopper (Schistocerca americana) G-En.
- - Mammalian and birds En-1 and En-2.
- - Zebrafish Eng-1, -2 and -3.
- - Sea urchin (Tripneusteas gratilla) SU-HB-en.
- - Leech (Helobdella triserialis) Ht-En.
-
- Engrailed homeobox proteins are characterized by the presence of a conserved
- region of some 20 amino-acid residues located at the C-terminal of the
- 'homeobox' domain. As a signature pattern for this subfamily of proteins, we
- have used a stretch of eight perfectly conserved residues in this region.
-
- -Consensus pattern: L-M-A-Q-G-L-Y-N
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: October 1993 / Text revised.
-
- [ 1] Scott M.P., Tamkun J.W., Hartzell G.W. III
- Biochim. Biophys. Acta 989:25-48(1989).
- [ 2] Gehring W.J.
- Science 236:1245-1252(1987).
-