Tchem MAPKAPK5 MAP kinase-activated protein kinase 5

Protein Summary

Description

Tumor suppressor serine/threonine-protein kinase involved in mTORC1 signaling and post-transcriptional regulation. Phosphorylates FOXO3, ERK3/MAPK6, ERK4/MAPK4, HSP27/HSPB1, p53/TP53 and RHEB. Acts as a tumor suppressor by mediating Ras-induced senescence and phosphorylating p53/TP53. Involved in post-transcriptional regulation of MYC by mediating phosphorylation of FOXO3: phosphorylation of FOXO3 leads to promote nuclear localization of FOXO3, enabling expression of miR-34b and miR-34c, 2 post-transcriptional regulators of MYC that bind to the 3'UTR of MYC transcript and prevent MYC translation. Acts as a negative regulator of mTORC1 signaling by mediating phosphorylation and inhibition of RHEB. Part of the atypical MAPK signaling via its interaction with ERK3/MAPK6 or ERK4/MAPK4: the precise role of the complex formed with ERK3/MAPK6 or ERK4/MAPK4 is still unclear, but the complex follows a complex set of phosphorylation events: upon interaction with atypical MAPK (ERK3/MAPK6 or ERK4/MAPK4), ERK3/MAPK6 (or ERK4/MAPK4) is phosphorylated and then mediates phosphorylation and activation of MAPKAPK5, which in turn phosphorylates ERK3/MAPK6 (or ERK4/MAPK4). Mediates phosphorylation of HSP27/HSPB1 in response to PKA/PRKACA stimulation, inducing F-actin rearrangement. The protein encoded by this gene is a tumor suppressor and member of the serine/threonine kinase family. In response to cellular stress and proinflammatory cytokines, this kinase is activated through its phosphorylation by MAP kinases including MAPK1/ERK, MAPK14/p38-alpha, and MAPK11/p38-beta. The encoded protein is found in the nucleus but translocates to the cytoplasm upon phosphorylation and activation. This kinase phosphorylates heat shock protein HSP27 at its physiologically relevant sites. Two alternately spliced transcript variants of this gene encoding distinct isoforms have been reported. [provided by RefSeq, Nov 2012]

Uniprot Accession IDs

• Q8IW41
• B3KVA5
• O60491
• Q86X46
• Q9BVX9
• Q9UG86
• MAPK-activated protein kinase 5

Gene Name

• MAPKAPK5

Ensembl ID

• ENST00000550735
• ENSP00000449667
• ENSG00000089022
• ENST00000551404
• ENSP00000449381

Symbol

• PRAK
• MK5
• MK-5
• PRAK
• MAPKAP-K5

Knowledge Table

Most Knowledge About	Knowledge Value (0 to 1 scale)
molecular function	0.99
histone modification site profile	0.9
transcription factor binding site profile	0.83
kinase perturbation	0.81
kinase	0.8

Protein Classes

PANTHER Classes

Protein / Transferase / Kinase / Protein Kinase / Non-receptor Serine/threonine Protein Kinase / Map Kinase-activated Protein Kinase 5

Protein / Cytoskeletal Protein / Microtubule Family Cytoskeletal Protein / Non-motor Microtubule Binding Protein / Map Kinase-activated Protein Kinase 5

DTO Classes

Protein / Kinase / Protein Kinase / Camk Group / Mapkapk Family / Mapkapk Subfamily / Map Kinase-activated Protein Kinase 5

IDG Development Level Summary

Tdark

These are targets about which virtually nothing is known. They do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 135.62   (req: < 5)

Gene RIFs: 21   (req: <= 3)

Antibodies: 547   (req: <= 50)

Tbio

These targets do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 135.62   (req: >= 5)

Gene RIFs: 21   (req: > 3)

Antibodies: 547   (req: > 50)

- OR - satisfy the following criterion:

Gene Ontology Terms: 19

Tchem

Target has at least one ChEMBL compound with an activity cutoff of < 30 nM - AND - satisfies the preceding conditions

Active Ligands: 6

Tclin

Target has at least one approved drug - AND - satisfies the preceding conditions

Active Drug: 0