PSEEN0657 is an uncharacterized 635-amino acid protein containing a DUF2134 (Domain of Unknown Function 2134) domain and Tad (tight adherence) domains associated with pilus assembly machinery. This protein features a putative Flp pilus-assembly TadG-like N-terminal domain and is predicted to be involved in bacterial attachment and biofilm formation. The protein represents an important but poorly understood component of the Type IV pilus system in Pseudomonas entomophila, an entomopathogenic soil bacterium. Understanding this protein's function is crucial for elucidating bacterial adhesion mechanisms in environmental contexts, particularly in estuary sediment environments where P. entomophila interactions are ecologically significant.
Definition: The process of assembling bacterial pili through the action of proteins containing DUF2134 domains, which are associated with tight adherence (Tad) systems
Justification: DUF2134 represents a specific but poorly understood domain family involved in pilus assembly that lacks detailed functional annotation in GO
Definition: The process by which bacteria attach to surfaces in estuarine sediment environments through specialized adhesion machinery
Justification: Environmental context-specific adhesion processes important for bacterial ecology in sediment environments
| GO Term | Evidence | Action | Reason |
|---|---|---|---|
| GO:0009297 pilus assembly | TAS UniProt:Q1IFG0 | NEW | Summary: Predicted function based on Tad and DUF2134 domains associated with pilus systems Reason: The Tad domains and DUF2134 are characteristic of proteins involved in Type IV pilus assembly and bacterial attachment systems. |
| GO:0071973 bacterial-type flagellum-dependent cell motility | TAS UniProt:Q1IFG0 | NEW | Summary: Related function - pilus assembly contributes to bacterial motility and surface attachment Reason: Pilus assembly proteins often contribute to bacterial motility through surface adhesion and twitching motility mechanisms. |
| GO:0005576 extracellular region | TAS UniProt:Q1IFG0 | NEW | Summary: Predicted cellular location - pilus assembly proteins often localize extracellularly Reason: Pilus assembly machinery components are typically secreted or surface-associated to facilitate pilus formation and function. |
| GO:0003674 molecular_function | NAS | NEW | Summary: Added to align core_functions with existing annotations. Reason: Core function term not present in existing_annotations. |
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Download this section (compressed HTML)Q: What is the specific molecular mechanism by which DUF2134 domains contribute to pilus assembly?
Suggested experts: Bacterial pilus specialists, Structural biologists, Protein domain researchers
Q: How does PSEEN0657 function compare to characterized TadG proteins in other bacterial species?
Suggested experts: Comparative genomics experts, Bacterial adhesion researchers, Type IV pilus specialists
Q: What role does this protein play in P. entomophila interactions with insect hosts and soil environments?
Suggested experts: Bacterial pathogenesis researchers, Environmental microbiology specialists, Host-pathogen interaction experts
Q: Can this protein serve as a target for controlling bacterial adhesion in environmental or agricultural contexts?
Suggested experts: Applied microbiology researchers, Biotechnology specialists, Agricultural microbiology experts
Experiment: Test whether PSEEN0657 can complement pilus assembly defects in well-characterized Type IV pilus mutants to determine functional equivalence.
Type: Functional complementation analysis
Experiment: Use fluorescent protein fusions and cell fractionation to determine the subcellular localization and membrane association of PSEEN0657.
Type: Protein localization studies
Experiment: Compare biofilm formation capacity and surface attachment of wild-type vs PSEEN0657 knockout strains under various environmental conditions.
Type: Biofilm formation assays
Experiment: Create domain deletion mutants to determine the specific roles of DUF2134 and Tad domains in protein function and pilus assembly.
Type: Protein domain structure-function analysis
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