MKK4, also known as JNKK1 and SEK1, is a dual specificity kinase that belongs to the Ser/Thr protein kinase family. MKK4 is a direct activator of MAP kinases in response to various environmental stresses or mitogenic stimuli. MKK4 phosphorylates and activates p38 MAP kinase and JNK but not ERK 1/2 (1-2). JNK is activated by dual phosphorylation at Thr and Tyr by MKK4 and MKK7; although MKK4 will preferentially phosphorylate Tyr (3). MKK4 is also known to be a tumor suppressor, as mutations inactivating the MKK4 gene have been found in 5% of a wide variety of tumor types (4).

Long Name

Mitogen-activated Protein Kinase Kinase 4

Alternate Names

JNKK1, MAP2K4, MAPKK4, MEK4, PRKMK4, SERK1

Gene Symbol

MAP2K4

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Product Specific Notices for MKK4/MEK4 Antibody (323042) [Janelia Fluor® 549]

Sold under license from the Howard Hughes Medical Institute, Janelia Research Campus.

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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MKK4/MEK4 Antibody (323042) [Janelia Fluor® 549]

Novus Biologicals, part of Bio-Techne | Catalog # FAB3390I

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Background: MKK4