The Eukaryotic Linear Motif resource for
Functional Sites in Proteins
Functional site class:
TYR phosphorylation site
Functional site description:
Protein tyrosine kinases (PTKs) catalyze the transfer of the gamma-phosphate of ATP to tyrosine residues of protein substrates.
ELMs with same func. site: MOD_TYR_CSK  MOD_TYR_DYR 
ELM Description:
Members of the non-receptor tyrosine kinase Csk family phosphorylate the C-terminal tyrosine residues of the Src family.
Pattern: [TAD][EA].Q(Y)[QE].[GQA][PEDLS]
Pattern Probability: 2.926e-07
Present in taxon: Metazoa
Interaction Domain:
Pkinase_Tyr (PF07714) Protein tyrosine kinase (Stochiometry: 1 : 1)
o See 12 Instances for MOD_TYR_CSK
o Abstract
Protein-tyrosine kinases (PTKs) are essential regulators of intracellular signal-transduction pathways in eukaryotes. Tyrosine phosphorylation plays an important role in the control of several cellular processes such as cell proliferation, cell migration, differentiation, immune response, and cell cycle. Their activity is normally tight control and regulated. Perturbation of the PTK signaling by mutation and other genetic alterations result in deregulated kinase activity and malignant transformation.
The mechanism of substrate recognition by the PTKs has been one of the major challenges in phosphorylation research over the years. Peptide library approaches have provided some insight about the role of amino acid immediately surrounding Tyr phosphorylation sites and it has been shown that the specificity of PTKs is dominated by acidic or hydrophobic residues adjacent to the phosphorylated residue (Songyang,1999). Based on a larger set of experimentally verified phosphorylation sites, it was found that some amino acids were not present in some positions, e.g. tryptophan was never found in position -5 to -1. Similarly, cysteine was never found at position -2 and -1, while methionine was always absent in position -2 (Blom,2000). Recently, numerous studies have revealed that the local amino acid sequence is certainly not the sole determinant of substrate specificity but other several factor, including local structure, protein-protein interaction and surface accessibility, also play a main role.
o 3 selected references:

o 3 GO-Terms:

o 12 Instances for MOD_TYR_CSK
(click table headers for sorting; Notes column: =Number of Switches, =Number of Interactions)
Acc., Gene-, NameStartEndSubsequenceLogic#Ev.OrganismNotes
P08631 HCK
518 526 IQSVLDDFYTATESQYQQQP TP 1 Homo sapiens (Human)
P51451 BLK
497 505 LQSVLEDFYTATERQYELQP TP 1 Homo sapiens (Human)
P09769 FGR
519 527 SFLEDYFTSAEPQYQPGDQT TP 1 Homo sapiens (Human)
P07947 YES1
533 541 SFLEDYFTATEPQYQPGENL TP 1 Homo sapiens (Human)
P07948 LYN
504 512 LQSVLDDFYTATEGQYQQQP TP 1 Homo sapiens (Human)
Q07014 Lyn
504 512 LQSVLDDFYTATEGQYQQQP TP 1 Rattus norvegicus (Norway rat)
P25911 Lyn
504 512 LQSVLDDFYTATEGQYQQQP TP 1 Mus musculus (House mouse)
P06241 FYN
527 535 SFLEDYFTATEPQYQPGENL TP 1 Homo sapiens (Human)
P39688 Fyn
527 535 GFLEDYFTATEPQYQPGENL TP 1 Mus musculus (House mouse)
Q9WUD9 Src
526 534 AFLEDYFTSTEPQYQPGENL TP 1 Rattus norvegicus (Norway rat)
P00523 SRC
523 531 AFLEDYFTSTEPQYQPGENL TP 1 Gallus gallus (Chicken)
P12931 SRC
526 534 AFLEDYFTSTEPQYQPGENL TP 1 Homo sapiens (Human)
Please cite: The eukaryotic linear motif resource - 2018 update. (PMID:29136216)

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