HMPREF1058_RS08555 is a large membrane-associated regulatory protein containing a helix-turn-helix (HTH) LuxR-type DNA-binding domain. This 798-amino acid protein functions as a transcriptional regulator controlling genes involved in phosphosugar metabolism and growth responses. The protein contains a signal peptide, multiple transmembrane domains, and structural similarities to quinoprotein alcohol dehydrogenase-like proteins, suggesting it may have dual regulatory and enzymatic functions. This protein represents an important regulatory component in Bacteroidetes metabolism, particularly for adapting to different carbon sources in the gut environment.
Definition: The process of controlling the expression of genes involved in the uptake, transport, and catabolism of phosphorylated sugars in bacterial cells
Justification: Specific regulatory process not captured by existing GO terms, important for bacterial adaptation to different carbohydrate sources
| GO Term | Evidence | Action | Reason |
|---|---|---|---|
| GO:0016020 membrane | IEA UniProt:I9U7L5 | NEW | Summary: Correct cellular location - protein contains signal peptide and transmembrane domains Reason: UniProt annotations show membrane localization supported by signal peptide prediction and transmembrane domain analysis. Not in GOA but present in UniProt DR section. |
| GO:0003700 DNA-binding transcription factor activity | TAS UniProt:I9U7L5 | NEW | Summary: Core molecular function - HTH LuxR-type domain indicates transcriptional regulatory activity Reason: The HTH LuxR-type domain is characteristic of DNA-binding transcriptional regulators that control gene expression. |
| GO:0006355 regulation of DNA-templated transcription | TAS UniProt:I9U7L5 | NEW | Summary: Core biological process - transcriptional regulator controlling phosphosugar metabolism Reason: As a LuxR-type transcriptional regulator, this protein is involved in controlling transcription of target genes. |
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Download this section (compressed HTML)Q: What specific genes and pathways are regulated by this LuxR-type protein in phosphosugar metabolism?
Suggested experts: Bacterial metabolism researchers, Transcriptional regulation specialists, Systems biology experts
Q: How does this protein integrate environmental signals to control transcriptional responses?
Suggested experts: Signal transduction researchers, Bacterial physiology specialists, Regulatory network analysts
Q: What is the evolutionary relationship between this protein and other LuxR-type regulators in Bacteroidetes?
Suggested experts: Comparative genomics researchers, Bacterial evolution specialists, Phylogenetic analysis experts
Q: Does this protein have enzymatic activity in addition to its regulatory function?
Suggested experts: Enzyme biochemists, Protein function specialists, Structural biologists
Experiment: RNA-seq analysis of wild-type vs knockout strains under different carbon source conditions to identify regulated genes and pathways.
Type: Transcriptional profiling
Experiment: ChIP-seq or EMSA experiments to identify direct DNA-binding targets and consensus recognition sequences for the HTH domain.
Type: DNA-binding specificity analysis
Experiment: Systematic growth analysis on various phosphosugars and carbon sources to determine the regulatory role in metabolism.
Type: Growth phenotype characterization
Experiment: X-ray crystallography or cryo-EM structure of the full-length protein to understand the relationship between regulatory and potential enzymatic domains.
Type: Protein structure determination
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