The Eukaryotic Linear Motif resource for
Functional Sites in Proteins
Accession:
Functional site class:
GYF ligand
Functional site description:
Proline-rich sequences recognized by GYF domains - involved in lymphoid signaling
ELM Description:
LIG_GYF is a proline-rich sequence specifically recognized by GYF domains. Known cases so far involve the CD2 binding protein CD2BP2, which specifically recognizes the cytoplasmic tail of CD2 surface receptor. The LIG_GYF sequence is generally composed of a pair of similar proline-rich sequences and has been shown to compete in vitro with the SH3 domain of the src-family FYN kinase. Each proline-rich sequence is spanned by positively charged residues that have complementary binding partners on the GYF domain. Due to the limited experimental data available, the current pattern is certainly overdetermined and a better description should be possible in future.
Pattern: [QHR].{0,1}P[PL]PP[GS]H[RH]
Pattern Probability: 1.686e-08
Present in taxons: Eukaryota Homo sapiens Mus musculus Rattus norvegicus
Interaction Domain:
GYF (PF02213) GYF domain (Stochiometry: 1 : 1)
PDB Structure: 1L2Z
o See 3 Instances for LIG_GYF
o Abstract
The glycine-tyrosine-phenylalanine, or GYF, domain has been identified at the N-term of a number of proteins in organisms ranging from S.pombe to H.sapiens with fairly conserved sequence. It interacts with proline-rich sequences and, in humans, it has been shown to recognize specifically two PPPPGHR repeats at the C-term of the CD2 cell surface receptor. Despite functioning as a proline-rich peptide binding domain, the GYF fold is structurally unrelated to the SH3 or WW domains.
The NMR structure of the GYF domain of the CD2BP2 protein has been solved in complex with a proline-rich peptide (1L2Z) and the residues of the domain involved in binding have been identified. The binding pocket is very hydrophobic with a relatively smooth, concave surface. The GYF tripeptide (conserved at the C term of the domain sequence) is involved in the binding.
o 2 selected references:

o 3 GO-Terms:

o 3 Instances for LIG_GYF
(click table headers for sorting; Notes column: =Number of Switches, =Number of Interactions)
Acc., Gene-, NameStartEndSubsequenceLogic#Ev.OrganismNotes
P06729 CD2
CD2_HUMAN
295 303 SQAPSHRPPPPGHRVQHQPQ TP 4 Homo sapiens (Human)
1 
1 
P06729 CD2
CD2_HUMAN
281 289 PATSQHPPPPPGHRSQAPSH TP 2 Homo sapiens (Human)
P37998 CD2
CD2_HORSE
276 284 NPAASQPPPPPSHRPQAPGH TP 1 Equus caballus (Horse)
Please cite: ELM 2016-data update and new functionality of the eukaryotic linear motif resource. (PMID:26615199)

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