Recombinant Rickettsia typhi Protein translocase subunit SecD (secD)
Description
Overview of the Sec-Dependent Secretion Pathway in Rickettsia typhi
The Sec translocon is essential for protein secretion in bacteria, facilitating the transport of preproteins across the cytoplasmic membrane. Key components include:
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SecA: An ATPase that drives translocation through ATP hydrolysis .
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SecD, SecF, SecY, and other integral membrane proteins: These form the translocation channel .
While Rickettsia genomes encode homologs of SecD, functional studies on this specific subunit in R. typhi are absent in the literature. Research has instead focused on SecA and other Sec-related proteins.
SecA
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Structure: The N-terminal ATPase domain is conserved, but the C-terminal domain is species-specific .
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Functional Complementation: Full-length R. typhi SecA failed to rescue E. coli SecA mutants, but chimeric proteins (N-terminal Rickettsia + C-terminal E. coli SecA) restored function .
Signal Peptidases
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LepB (SPase I): Processes preproteins after Sec-dependent translocation. R. typhi LepB complements E. coli mutants .
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LspA (SPase II): Processes lipoproteins. R. typhi LspA restores growth in E. coli temperature-sensitive mutants .
TolC-Dependent Secretion
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RARP-1: An ankyrin repeat protein secreted via a hybrid Sec-TolC pathway in R. typhi. Requires Sec for inner membrane translocation and TolC for outer membrane export .
Gaps in Knowledge: SecD in Rickettsia typhi
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Cloned or expressed recombinant R. typhi SecD.
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Tested its interaction with other Sec components.
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Evaluated its role in virulence or intracellular survival.
Comparative Analysis of Sec Pathway Components
Future Directions
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Heterologous Expression: Cloning secD from R. typhi and testing its ability to complement E. coli SecD/SecF mutants.
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Protein-Protein Interaction Studies: Mapping interactions between SecD, SecF, and SecY in Rickettsia.
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Role in Pathogenesis: Investigating whether SecD contributes to effector protein secretion during infection.
Product Specs
Please note: We will prioritize shipping the format currently available in our inventory. However, if you have a specific format requirement, kindly indicate it in your order notes, and we will prepare accordingly.
Please note: All our proteins are shipped with standard blue ice packs. If you require dry ice shipping, please contact us in advance as additional fees will apply.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Target Background
KEGG: rty:RT0575
STRING: 257363.RT0575
