Molecular Target Synopsis
Domains and Structures
Drugs and Clinical Candidates
Ligand Efficiency Plot
Family Cladogram
Interaction Network
Gene Expression
Gene Copy Number Variation
Germline Genetics

MAPK13 (O15264) - Overview - Molecular Target Synopsis


MAPK13, Mitogen-activated protein kinase 13
Enzyme Classification
UniProt O15264

Also Known as MK13_HUMAN, MAPK13, PRKM13, SAPK4

Serine/threonine kinase which acts as an essential component of the MAP kinase signal transduction pathway. MAPK13 is one of the four p38 MAPKs which play an important role in the cascades of cellular responses evoked by extracellular stimuli such as proinflammatory cytokines or physical stress leading to direct activation of transcription factors such as ELK1 and ATF2. Accordingly, p38 MAPKs phosphorylate a broad range of proteins and it has been estimated that they may have approximately 200 to 300 substrates each. MAPK13 is one of the less studied p38 MAPK isoforms. Some of the targets are downstream kinases such as MAPKAPK2, which are activated through phosphorylation and further phosphorylate additional targets. Plays a role in the regulation of protein translation by phosphorylating and inactivating EEF2K. Involved in cytoskeletal remodeling through phosphorylation of MAPT and STMN1. Mediates UV irradiation induced up-regulation of the gene expression of CXCL14. Plays an important role in the regulation of epidermal keratinocyte differentiation, apoptosis and skin tumor development. Phosphorylates the transcriptional activator MYB in response to stress which leads to rapid MYB degradation via a proteasome-dependent pathway. MAPK13 also phosphorylates and down-regulates PRKD1 during regulation of insulin secretion in pancreatic beta cells. Interacts with MAPK8IP2.

Inspect Structure
See all 3D Structures for MAPK13

Isoforms / Transcripts (Protein Coding)

Sub-cellular localization

GO terms: MAPK13 is active in the following subcellular-locations: cytoplasm, cytosol, nucleus.

GO terms

Gene Copy Number Variation

In COSMIC - Cell Lines Project MAPK13 has gain in 2 cell-lines, loss in 1 cell-lines and no signal in 1002 cell-lines. (see details)

Gene Expression

In NCI60, the highest expressing cell lines are: HT29, NCI_H322M, HCC_2998

In Array Express (RNA-seq of 675 commonly used human cancer cell lines), the highest expressing cell lines are: NCI-H2347, NCI-H1869, HCC2935

In Array Express (RNA-seq of long poly adenylated RNA and long non poly adenylated RNA from ENCODE cell lines), the highest expressing cell lines are: HMEC, NHEK, HSMM

(see details)

RNA Interference

MAPK13 was reported in the following RNAI studies:

Cell - Large Scale Profiling of Kinase Dependencies in Cancer Cell Lines, the highest RNAi cell lines are: H23, CROE33. (see details)

3D Structures

For MAPK13 there are:
7 structures (8 chains) solved
4 are solved in complex with at least one small molecule ligand

(see details)
Molecular Target 3D Synopsis

Screening and Chemistry

MAPK13 has been screened with 1742 compounds (2888 bioactivities), 410 compounds have bioactivities that show binding affinity of <= 500nM (583 bioactivities). (see details)