ArticleMolecular microbiology2020
The TraK accessory factor activates substrate transfer through the pKM101 type IV secretion system independently of its role in relaxosome assembly.
Article in Molecular microbiology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed.
- Article
- Enhancing conjugation from E. coli to Streptomyces coelicolor by incorporating traJ into mobilizable plasmids.Applied microbiology and biotechnology · 2025Article
- Article
- Conjugative delivery of toxin genesJournal of bacteriology · 2025Article
- Conjugative transfer of the IncN plasmid pKM101 is mediated by dynamic interactions between the TraK accessory factor and TraI relaxase.FEBS letters · 2024Article
- Low Concentration of Wenyang Tonglin Decoction Promotes Conjugation and Transfer of Drug-Resistant Plasmids among Heterologous Strains.Chinese journal of integrative medicine · 2024Article
- The F plasmid conjutome: the repertoire ofmSphere · 2024Article
- Chimeric systems composed of swapped Tra subunits between distantly-related F plasmids reveal striking plasticity among type IV secretion machines.PLoS genetics · 2024Article
- Chimeric systems composed of swapped Tra subunits between distantly-related F plasmids reveal striking plasticity among type IV secretion machines.bioRxiv : the preprint server for biology · 2023Article
- DNA Transport through the Dynamic Type IV Secretion System.Infection and immunity · 2023Review
- The Effect of Outer Space and Other Environmental Cues on Bacterial Conjugation.Microbiology spectrum · 2023Article
- Structural and functional characterization of TraI from pKM101 reveals basis for DNA processing.Life science alliance · 2023Article
- The horizontal transfer of Pseudomonas aeruginosa PA14 ICE PAPI-1 is controlled by a transcriptional triad between TprA, NdpA2 and MvaT.Nucleic acids research · 2021Article
- Article
- Type IV secretion systems: Advances in structure, function, and activation.Molecular microbiology · 2021Review
- Article
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2 authors.
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Abstract
A large subfamily of the type IV secretion systems (T4SSs), termed the conjugation systems, transmit mobile genetic elements (MGEs) among many bacterial species. In the initiating steps of conjugative transfer, DNA transfer and replication (Dtr) proteins assemble at the origin-of-transfer (oriT) sequence as the relaxosome, which nicks the DNA strand destined for transfer and couples the nicked substrate with the VirD4-like substrate receptor. Here, we defined contributions of the Dtr protein TraK, a predicted member of the Ribbon-Helix-Helix (RHH) family of DNA-binding proteins, to transfer of DNA and protein substrates through the pKM101-encoded T4SS. Using a combination of cross-linking/affinity pull-downs and two-hybrid assays, we determined that TraK self-associates as a probable tetramer and also forms heteromeric contacts with pKM101-encoded TraI relaxase, VirD4-like TraJ receptor, and VirB11-like and VirB4-like ATPases, TraG and TraB, respectively. TraK also promotes stable TraJ-TraB complex formation and stimulates binding of TraI with TraB. Finally, TraK is required for or strongly stimulates the transfer of cognate (pKM101, TraI relaxase) and noncognate (RSF1010, MobA relaxase) substrates. We propose that TraK functions not only to nucleate pKM101 relaxosome assembly, but also to activate the Tra
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