| Accession: | |
|---|---|
| Functional site class: | PP1-docking motif MyPhoNE |
| Functional site description: | Protein phosphatase-1 (PP1), an enzyme that catalyzes dephosphorylation of proteins, is ubiquitously expressed and highly conserved in eukaryotes. It plays a regulatory role in a wide range of cellular processes, including gene transcription, protein synthesis, cell cycle progression, muscle contraction, and neuronal signalling. The PP1 apoenzyme is a single catalytic domain that can interact with more than 200 regulators, converting it into hundreds of highly specific holoenzymes. The catalytic site of PP1 is at the intersection of three potential docking motif-binding regions: the acidic, hydrophobic and C-terminal grooves (Peti,2013). Most regulatory proteins interact with PP1 at the catalytic site via the RVXF docking motif (DOC_PP1_RVXF_1) but docking motifs such as the SILK motif (DOC_PP1_SILK_1) and the MyPhoNE motif (DOC_PP1_MyPhoNE_1) also play essential roles in regulating PP1 activity and substrate specificity (Hendrickx,2009). |
| ELMs with same tags: |
|
| ELM Description: | The MyPhoNE (Myosine Phosphatase N-terminal Element) motif, generally found N-terminal to an RVxF motif, mediates docking of regulatory proteins to the catalytic subunit of PP1 (PP1c). The peptide is defined by eight amino acid residues and adopts a five-turn alpha helix that interacts with a hydrophobic cleft on the surface of PP1c (1S70) (Terrak,2004). The first position of the motif is invariantly occupied by arginine. The second position is not defined as this residue points away from the binding site, however proline is likely not allowed in this position as this would disrupt the helical conformation. The third position either contains a glutamic acid, a glutamine or an aspartic acid residue. Conservation in this position might be due to an intra-peptide interaction with the side chain of the residue in position 6 or 7, of which at least one always contains a lysine or arginine residue. Such an interaction might stabilize the helical conformation. The fourth position is invariantly occupied by a glutamine, which makes important hydrogen bonds, while a specific hydrophobic residue, either valine, leucine, or isoleucine, is always found in the next position. For position 5, a hydrophic amino acid is needed (valine, isoleucine or leucine). Finally, the last position requires either a tyrosine or tryptophan residue. |
| Pattern: | R[^P][DEQ]Q[VIL]([RK][^P]|[^P][RK])[YW] |
| Pattern Probability: | 4.405e-07 |
| Present in taxon: | Metazoa |
| Interaction Domain: |
Metallophos (PF00149)
Calcineurin-like phosphoesterase
(Stochiometry: 1 : 1)
PDB Structure: 1S70
|
| Acc., Gene-, Name | Start | End | Subsequence | Logic | #Ev. | Organism | Notes |
|---|---|---|---|---|---|---|---|
| Q9BZL4 PPP1R12C PP12C_HUMAN |
22 | 29 | AAARERRREQLRQWGARAGA | TP | 1 | Homo sapiens (Human) | |
| Q90623 PPP1R12A MYPT1_CHICK |
10 | 17 | ADAKQKRNEQLKRWIGSETD | TP | 1 | Gallus gallus (Chicken) | |
| Q5SQS7 SH2D4B SH24B_HUMAN |
32 | 39 | ILFYKMREEQLRRWKERETW | TP | 1 | Homo sapiens (Human) | |
| Q9H788 SH2D4A SH24A_HUMAN |
32 | 39 | ILFFKMREEQIRRWKEREAA | TP | 1 | Homo sapiens (Human) | |
| Q96T49 PPP1R16B PP16B_HUMAN |
30 | 37 | RAAQKRRAQQLKKWAQYEQD | TP | 1 | Homo sapiens (Human) | |
| Q96I34 PPP1R16A PP16A_HUMAN |
30 | 37 | KHAQKRRAQQVKMWAQAEKE | TP | 1 | Homo sapiens (Human) | |
| O60237 PPP1R12B MYPT2_HUMAN |
19 | 26 | ESARMRRAEQLRRWRGSLTE | TP | 1 | Homo sapiens (Human) | |
| O14974 PPP1R12A MYPT1_HUMAN |
10 | 17 | ADAKQKRNEQLKRWIGSETD | TP | 1 | Homo sapiens (Human) | |
| Q9Y6X6 MYO16 MYO16_HUMAN |
24 | 31 | RLVKRMRCEQIKAYYEREKA | TP | 1 | Homo sapiens (Human) |