Transcriptional regulator ModE - P0A9G8 (MODE_ECOLI)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P0A9G8: 5
Functions as an intracellular molybdate sensor. The ModE-Mo complex acts as a repressor of the modABC operon, which is involved in the transport of molybdate (PubMed:8550508). Binds modA promoter DNA in the absence of molybdate, however molybdate binding confers increased DNA affinity (PubMed:9210473, PubMed:9044285). Binds the promoter of moaA activating its transcription; binding is not enhanced by molybdate (PubMed:9044285). The protein dimer binds the consensus palindrome sequence 5'-TATAT-N7-TAYAT-3' and a variant 5'-TGTGT-N7-TGYGT-3' (PubMed:9210473, PubMed:9044285, PubMed:16205910). Acts as a regulator of the expression of 67 genes, many of which encode molybdoenzymes, acts both directly and indirectly (PubMed:9466267, PubMed:10206709, PubMed:16205910). ModE also binds tungstate (PubMed:9210473, PubMed:11259434). UniProt
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Subunit Structure
Homodimer. UniProt
Deletion of the C-terminus (from residues 122 on) results in constitutive repression of modA (PubMed:8931336). Contains two major domains: the N-terminal domain I forms a winged helix-turn-helix motif and interacts with DNA (Probable). The C-terminal domain II is the olybdate-binding component and contains a tandem repeat of the Mop domain, each of which forms a beta-barrel (Probable) (PubMed:12581638). The N-terminal domain plays a major role in the dimerization of the protein whereas the C-terminal domain contributes to the stability of the complex. UniProt
  • Other Gene names: modE, modR, b0761, JW0744
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