ID:MLX_HUMAN DESCRIPTION: RecName: Full=Max-like protein X; AltName: Full=Class D basic helix-loop-helix protein 13; Short=bHLHd13; AltName: Full=Max-like bHLHZip protein; AltName: Full=Protein BigMax; AltName: Full=Transcription factor-like protein 4; FUNCTION: Transcription regulator. Forms a sequence-specific DNA- binding protein complex with MAD1, MAD4, MNT, WBSCR14 and MLXIP which recognizes the core sequence 5'-CACGTG-3'. The TCFL4-MAD1, TCFL4-MAD4, TCFL4-WBSCR14 complexes are transcriptional repressors. Plays a role in transcriptional activation of glycolytic target genes. Involved in glucose-responsive gene regulation. SUBUNIT: Efficient DNA binding requires dimerization with another bHLH protein. Binds DNA as a heterodimer with MAD1, MAD4, MNT, WBSCR14 and MLXIP. Can also bind DNA as a homodimer. SUBCELLULAR LOCATION: Isoform Alpha: Cytoplasm. Note=Found predominantly in the cytoplasm. SUBCELLULAR LOCATION: Isoform Beta: Cytoplasm. Note=Found predominantly in the cytoplasm. SUBCELLULAR LOCATION: Isoform Gamma: Nucleus. Note=Found predominantly in the nucleus. TISSUE SPECIFICITY: Expressed in all tissues tested, including spleen, thymus, prostate, ovary, intestine, colon, peripheral blood leukocyte, heart, liver, skeletal muscle and kidney. Lower levels of expression in testis, brain, placenta and lung. SIMILARITY: Contains 1 bHLH (basic helix-loop-helix) domain.
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.
ModBase Predicted Comparative 3D Structure on Q9UH92
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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.
Gene Ontology (GO) Annotations with Structured Vocabulary
Molecular Function: GO:0000977 RNA polymerase II regulatory region sequence-specific DNA binding GO:0000981 RNA polymerase II transcription factor activity, sequence-specific DNA binding GO:0001227 transcriptional repressor activity, RNA polymerase II transcription regulatory region sequence-specific binding GO:0003677 DNA binding GO:0003700 transcription factor activity, sequence-specific DNA binding GO:0005515 protein binding GO:0008134 transcription factor binding GO:0042803 protein homodimerization activity GO:0046982 protein heterodimerization activity GO:0046983 protein dimerization activity
Biological Process: GO:0000122 negative regulation of transcription from RNA polymerase II promoter GO:0006351 transcription, DNA-templated GO:0006355 regulation of transcription, DNA-templated GO:0045892 negative regulation of transcription, DNA-templated GO:0045944 positive regulation of transcription from RNA polymerase II promoter
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Sequence and Links to Tools and Databases 
Common Gene Haplotype Alleles 
