NCBI Accession #
NP_192046.1
NCBI GenBank Nucleotide #
NM_116367.3
NCBI Official Full Name
MAP kinase 4
NCBI Official Symbol
MPK4
NCBI Official Synonym Symbols
ATMPK4; F2N1.1; F2N1_1; MAP kinase 4; MAPK4
NCBI Protein Information
MAP kinase 4
NCBI Summary
Encodes a nuclear and cytoplasmically localized MAP kinase involved in mediating responses to pathogens. Its substrates include MKS1 and probably MAP65-1.The MAP65-1 interaction is involved in mediating cortical microtuble organization. Required for male-specific meiotic cytokinesis.
UniProt Synonym Gene Names
AtMPK4; MAP kinase 4
UniProt Protein Name
Mitogen-activated protein kinase 4
UniProt Primary Accession #
Q39024
UniProt Secondary Accession #
O04597; Q45V20; Q9M136; B2BDE5; B2BDE6; B2BDE8; B2BDG2
UniProt Related Accession #
Q39024
UniProt Comments
The ANPs-MKK6-MPK4 module is involved in the regulation of plant cytokinesis during meiosis and mitosis. Essential to promote the progression of cytokinesis and for cellularization (formation of the cell plate) during male-specific meiosis. Involved in cortical microtubules organization and stabilization by regulating the phosphorylation state of microtubule-associated proteins such as MAP65-1. Involved in root hair development process. Negative regulator of systemic acquired resistance (SAR) and salicylic acid- (SA) mediated defense response. Required for jasmonic acid- (JA) mediated defense gene expression. May regulate activity of transcription factor controlling pathogenesis-related (PR) gene expression. Seems to act independently of the SAR regulatory protein NPR1 (Nonexpresser of PR1). Phosphorylates MKS1 and transcription factors WRKY25 and WRKY33. The MEKK1, MKK1/MKK2 and MPK4 function in a signaling pathway that modulates the expression of genes responding to biotic and abiotic stresses and also plays an important role in pathogen defense by negatively regulating innate immunity (PubMed:11163186, PubMed:15225555, PubMed:15358537, PubMed:15990873, PubMed:18982020, PubMed:20215588, PubMed:20802223, PubMed:21098735, PubMed:21575092, PubMed:25770109). Phosphorylates MEKK2 upon treatment with flg22 (PubMed:22643122).