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A majority of hepatocellular carcinomas showed moderate to strong immunoreactivity. Few cases of malignant melanoma were moderately stained. Remaining malignant cells were either negative or weakly stained.
Malignant cells generally displayed weak to moderate cytoplasmic immunoreactivity. Additional nuclear positivity was observed in a few cases. Several cases of urothelial, renal, gastric and liver cancers were strongly stained.
GENE INFORMATION
Gene name
MAPK1 (HGNC Symbol)
Synonyms
ERK, ERK2, MAPK2, p41mapk, PRKM1, PRKM2
Description
Mitogen-activated protein kinase 1 (HGNC Symbol)
Entrez gene summary
This gene encodes a member of the MAP kinase family. MAP kinases, also known as extracellular signal-regulated kinases (ERKs), act as an integration point for multiple biochemical signals, and are involved in a wide variety of cellular processes such as proliferation, differentiation, transcription regulation and development. The activation of this kinase requires its phosphorylation by upstream kinases. Upon activation, this kinase translocates to the nucleus of the stimulated cells, where it phosphorylates nuclear targets. One study also suggests that this protein acts as a transcriptional repressor independent of its kinase activity. The encoded protein has been identified as a moonlighting protein based on its ability to perform mechanistically distinct functions. Two alternatively spliced transcript variants encoding the same protein, but differing in the UTRs, have been reported for this gene. [provided by RefSeq, Jan 2014]
P28482 [Direct mapping] Mitogen-activated protein kinase 1 Q1HBJ4 [Target identity:100%; Query identity:100%] Mitogen-activated protein kinase
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Enzymes ENZYME proteins Transferases Kinases CMGC Ser/Thr protein kinases MEMSAT-SVM predicted membrane proteins SPOCTOPUS predicted membrane proteins Phobius predicted secreted proteins Predicted intracellular proteins Plasma proteins RAS pathway related proteins Cancer-related genes Candidate cancer biomarkers FDA approved drug targets Small molecule drugs Protein evidence (Kim et al 2014) Protein evidence (Ezkurdia et al 2014)
P28482 [Direct mapping] Mitogen-activated protein kinase 1 Q1HBJ4 [Target identity:100%; Query identity:100%] Mitogen-activated protein kinase
Show all
Enzymes ENZYME proteins Transferases Kinases CMGC Ser/Thr protein kinases MEMSAT-SVM predicted membrane proteins SPOCTOPUS predicted membrane proteins Phobius predicted secreted proteins Predicted intracellular proteins Plasma proteins RAS pathway related proteins Cancer-related genes Candidate cancer biomarkers FDA approved drug targets Small molecule drugs Protein evidence (Kim et al 2014) Protein evidence (Ezkurdia et al 2014)