ID:MLTK_HUMAN DESCRIPTION: RecName: Full=Mitogen-activated protein kinase kinase kinase MLT; EC=2.7.11.25; AltName: Full=Human cervical cancer suppressor gene 4 protein; Short=HCCS-4; AltName: Full=Leucine zipper- and sterile alpha motif-containing kinase; AltName: Full=MLK-like mitogen-activated protein triple kinase; AltName: Full=Mixed lineage kinase-related kinase; Short=MLK-related kinase; Short=MRK; AltName: Full=Sterile alpha motif- and leucine zipper-containing kinase AZK; FUNCTION: Stress-activated component of a protein kinase signal transduction cascade. Regulates the JNK and p38 pathways. Pro- apoptotic. Role in regulation of S and G2 cell cycle checkpoint by direct phosphorylation of CHEK2. Isoform 1, but not isoform 2, causes cell shrinkage and disruption of actin stress fibers. Isoform 1 may have role in neoplastic cell transformation and cancer development. Isoform 1, but not isoform 2, phosphorylates histone H3 at 'Ser-28'. CATALYTIC ACTIVITY: ATP + a protein = ADP + a phosphoprotein. COFACTOR: Magnesium. ENZYME REGULATION: Activated by phosphorylation by PKN1 and autophosphorylation on Thr-161 and Ser-165. SUBUNIT: Homodimer. Interacts with PKN1 and ZNF33A. INTERACTION: Q16512:PKN1; NbExp=2; IntAct=EBI-687346, EBI-602382; O75582:RPS6KA5; NbExp=4; IntAct=EBI-602273, EBI-73869; P63104:YWHAZ; NbExp=4; IntAct=EBI-602273, EBI-347088; SUBCELLULAR LOCATION: Cytoplasm. Nucleus. Note=Translocates to the nucleus upon ultraviolet B irradiation. TISSUE SPECIFICITY: Ubiquitously expressed. Isoform 2 is the predominant form in all tissues examined, except for liver, in which isoform 1 is more highly expressed. SIMILARITY: Belongs to the protein kinase superfamily. STE Ser/Thr protein kinase family. MAP kinase kinase kinase subfamily. SIMILARITY: Contains 1 protein kinase domain. SIMILARITY: Contains 1 SAM (sterile alpha motif) domain. SEQUENCE CAUTION: Sequence=BAD92211.1; Type=Erroneous initiation; Note=Translation N-terminally shortened;
The RNAfold program from the Vienna RNA Package is used to perform the secondary structure predictions and folding calculations. The estimated folding energy is in kcal/mol. The more negative the energy, the more secondary structure the RNA is likely to have.
Pfam Domains: PF00069 - Protein kinase domain PF07714 - Protein tyrosine and serine/threonine kinase
SCOP Domains: 48371 - ARM repeat 56112 - Protein kinase-like (PK-like) 57997 - Tropomyosin
ModBase Predicted Comparative 3D Structure on Q9NYL2
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Orthologous Genes in Other Species
Orthologies between human, mouse, and rat are computed by taking the best BLASTP hit, and filtering out non-syntenic hits. For more distant species reciprocal-best BLASTP hits are used. Note that the absence of an ortholog in the table below may reflect incomplete annotations in the other species rather than a true absence of the orthologous gene.