The Eukaryote Linear Motif resource for Functional Sites in Proteins
Functional site class:
eh1 motif
Functional site description:
The eh1 motif binds to the WD40 domain of the Groucho/TLE corepressor.
ELM with this model: LIG_EH1_1 
Description:
The original eh1 motif identified in homeodomains has been augmented by Eberhard,2000, Barolo,2002, Copley,2005 and Goldstein,2005 who found other TF families with the motif. Any eh1 motif linked to a paired box (including some with homeodomains) shows a variant motif with Y or H at the first position where the classical motif is always F. The motif in ELM is a composite of these two variants which have both been reported to bind Groucho/TLE. There should be some other functional explanation for this consistent variation but at the time of pattern creation this was not resolved. This motif is found in natively disordered polypeptide but the conserved hydrophobic amino acids will cause buried false positives in globular domains.
Pattern: .[FYH].[IVM][^WFYP][^WFYP][ILM][ILMV].
Pattern Probability: 0.0000786
Present in taxon: Metazoa
Interaction Domain:
WD40 (PF00400) WD domain, G-beta repeat (Stochiometry: 1 : 1)
PDB Structure: 2CE8
<a style="white-space:nowrap;" href="http://www.rcsb.org/pdb/cgi/explore.cgi?pdbId=2CE8" target="_blank"><img src="/media/pdb.ico.png"/>2CE8</a>
o See 11 Instances for LIG_EH1_1
o Abstract
The eh1 motif was detected by its presence in several homeodomain transcription repressors, such as Engrailed and Goosecoid (Logan,1992, Smith,1996, Jimenez,1999). The motif has the consensus sequence FxIxxIL, where only F is completely conserved, and it allows for the recruitment of the corepressor Groucho/TLE (Jimenez,1997). The structure of the C-terminal WD40 repeat domain of the human Groucho/TLE1 protein, together with analysis of the effect of mutants in C. elegans Groucho/TLE homologue UNC-37 suggests an induced fit mechanism for the binding of the eh1 motif to the WD40 domain of Groucho/TLE (Pickles,2002). The Groucho/TLE corepressor proteins repress transcription by recruiting histione deacetylases, and possibly by additional mechanisms (Chen,2000).
Subsequently paired box protein Pax5 (Eberhard,2000) and hairless (Barolo,2002, Nagel,2005) have been shown to bind Groucho/TLE through eh1 motifs (note that eh1 was termed octapeptide motif in Pax).
More recently Copley,2005 undertook a bioinformatics survey and identified significantly conserved eh1 motifs in other transcription factor families including forkhead, T-box, zinc finger and doublesex. However, it should be noted that all paired box (plus hairless and one T-box protein, brachyury) motifs consistently substitute the conserved Phe with Tyr or His: the meaning of the implied change of function remains to be elucidated since both variants bind Groucho/TLE.
The transcription factor Dorsal is reported to contain an eh1-like motif reported to be responsible for the recruitment of Groucho but it does not match the other motifs (Flores-Saaib,2001).
Other interaction partners of Groucho depend on a LIG_WRPW_1 or LIG_WRPW_2 motif for binding. Remarkably, both eh1 and WRPW bind to the same site on Groucho, across the central hole of the WD40 propeller (Jennings,2006) despite their different sequences and bound conformations. The binding will be mutually exclusive, but it is not known if this is meaningful in practice.
o 13 selected references:

o 3 GO-Terms:

o 11 Instances for LIG_EH1_1
(click table headers for sorting; Notes column: =Number of Switches, =Number of Interactions)
Protein NameGene NameStartEndSubsequenceLogic#Ev.OrganismNotes
HMEN_DROME en 174 182 AKPSLAFSISNILSDRFGDV TP 3 Drosophila melanogaster (Fruit fly)
GSC_DROME Gsc 109 117 AAAASLFTIDSILGSRQQGG TP 2 Drosophila melanogaster (Fruit fly)
ODD_DROME odd 383 391 SSSEKPKRMLGFTIDEIMSR TP 3 Drosophila melanogaster (Fruit fly)
BOWEL_DROME bowl 735 743 APPPAPPRRTGFSIEDIMRR TP 2 Drosophila melanogaster (Fruit fly)
TBX22_HUMAN TBX22 9 17 SSRARAFSVEALVGRPSKRK TP 1 Homo sapiens (Human)
BRAC_HUMAN T 14 22 AGKSLQYRVDHLLSAVENEL TP 1 Homo sapiens (Human)
DMRT2_HUMAN DMRT2 542 550 VNEPLSFSVESILKRPSSAI TP 1 Homo sapiens (Human)
PAX5_HUMAN PAX5 178 186 DSAGSSYSISGILGITSPSA TP 2 Homo sapiens (Human)
GSC_HUMAN GSC 5 13 MPASMFSIDNILAARPRCKD TP 1 Homo sapiens (Human)
1 
HLES_DROME H 662 670 TRLNSSYSIHSLLGGSSGSG TP 4 Drosophila melanogaster (Fruit fly)
FOXA1_HUMAN FOXA1 399 407 YSFNHPFSINNLMSSSEQQH TP 2 Homo sapiens (Human)
Please cite: The Eukaryotic Linear Motif Resource ELM: 10 Years and Counting (PMID:24214962)

ELM data can be downloaded and distributed for non-commercial use according to the ELM Software License Agreement
feedback@elm.eu.org