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Dr Gary Sharples' Outputs (82)

Mycobacterium tuberculosis RuvX is a Holliday junction resolvase formed by dimerisation of the monomeric YqgF nuclease domain (2016)
Journal Article
Nautiyal, A., Rani, P., Sharples, G., & Muniyappa, K. (2016). Mycobacterium tuberculosis RuvX is a Holliday junction resolvase formed by dimerisation of the monomeric YqgF nuclease domain. Molecular Microbiology, 100(4), 656-674. https://doi.org/10.1111/mmi.13338

The Mycobacterium tuberculosis genome possesses homologues of the ruvC and yqgF genes that encode putative Holliday junction (HJ) resolvases. However, their gene expression profiles and enzymatic properties have not been experimentally defined. Here... Read More about Mycobacterium tuberculosis RuvX is a Holliday junction resolvase formed by dimerisation of the monomeric YqgF nuclease domain.

The tomato Nucleotide-Binding Leucine-Rich Repeat (NLR) Immune Receptor I-2 couples DNA-Binding to Nucleotide-Binding Domain Nucleotide Exchange (2015)
Journal Article
Fenyk, S., Dixon, C. H., Kittens, W. H., Townsend, P. D., Sharples, G. .., Pålsson, L. .-O., Takken, F. L. W., & Cann, M. J. (2016). The tomato Nucleotide-Binding Leucine-Rich Repeat (NLR) Immune Receptor I-2 couples DNA-Binding to Nucleotide-Binding Domain Nucleotide Exchange. Journal of Biological Chemistry, 291(3), 1137-1147. https://doi.org/10.1074/jbc.m115.698589

Plant nucleotide-binding leucine-rich repeat (NLR) proteins enable plants to recognise and respond to pathogen attack. Previously, we demonstrated that the Rx1 NLR of potato is able to bind and bend DNA in vitro. DNA binding in situ requires its genu... Read More about The tomato Nucleotide-Binding Leucine-Rich Repeat (NLR) Immune Receptor I-2 couples DNA-Binding to Nucleotide-Binding Domain Nucleotide Exchange.

Preparation of an antibacterial poly(ionic liquid) graft copolymer of hydroxyethyl cellulose (2015)
Journal Article
Joubert, F., Yeo, R. P., Sharples, G. J., Musa, O. M., Hodgson, D. R., & Cameron, N. R. (2015). Preparation of an antibacterial poly(ionic liquid) graft copolymer of hydroxyethyl cellulose. Biomacromolecules, 16(12), 397-3979. https://doi.org/10.1021/acs.biomac.5b01300

Poly(ionic liquid)s (P(IL)s) of different degrees of polymerisation (10, 50 and 100) were prepared via RAFT polymerisation using an alkyne-terminated xanthate as transfer agent, with a monomer conversion of up to ~80% and a ƉM of 1.5 for P(IL)100. Su... Read More about Preparation of an antibacterial poly(ionic liquid) graft copolymer of hydroxyethyl cellulose.

The Potato Nucleotide-Binding Leucine-Rich Repeat (NLR) Immune Receptor Rx1 is a Pathogen Dependent DNA-Deforming Protein (2015)
Journal Article
Fenyk, S., Townsend, P. D., Dixon, C. H., Spies, G. B., de San Eustaquio Campillo, A., Slootweg, E. J., …Cann, M. J. (2015). The Potato Nucleotide-Binding Leucine-Rich Repeat (NLR) Immune Receptor Rx1 is a Pathogen Dependent DNA-Deforming Protein. Journal of Biological Chemistry, 290(41), 24945-24960. https://doi.org/10.1074/jbc.m115.672121

Plant NLR proteins enable cells to respond to pathogen attack. Several NLRs act in the nucleus, however, conserved nuclear targets that support their role in immunity are unknown. Previously we noted a structural homology between the NB domain of NLR... Read More about The Potato Nucleotide-Binding Leucine-Rich Repeat (NLR) Immune Receptor Rx1 is a Pathogen Dependent DNA-Deforming Protein.

Preparation, properties, and antibacterial behavior of a novel cellulose derivative containing lactam groups (2014)
Journal Article
Joubert, F., Sharples, G. J., Musa, O. M., Hodgson, D. R., & Cameron, N. R. (2015). Preparation, properties, and antibacterial behavior of a novel cellulose derivative containing lactam groups. Journal of Polymer Science Part A: Polymer Chemistry, 53(1), 68-78. https://doi.org/10.1002/pola.27441

Lactam groups were introduced onto the backbone of hydroxyethyl cellulose (HEC) to modify properties, such as solubility in organic solvents and solution viscosity and to introduce possible antibacterial activity. Functionalization was achieved using... Read More about Preparation, properties, and antibacterial behavior of a novel cellulose derivative containing lactam groups.

Phage Orf family recombinases: conservation of activities and involvement of the central channel in DNA binding (2014)
Journal Article
Curtis, F., Malay, A., Trotter, A., Wilson, L., Barradell-Black, M., Bowers, L., …Sharples, G. (2014). Phage Orf family recombinases: conservation of activities and involvement of the central channel in DNA binding. PLoS ONE, 9(8), Article e102454. https://doi.org/10.1371/journal.pone.0102454

Genetic and biochemical evidence suggests that λ Orf is a recombination mediator, promoting nucleation of either bacterial RecA or phage Redβ recombinases onto single-stranded DNA (ssDNA) bound by SSB protein. We have identified a diverse family of O... Read More about Phage Orf family recombinases: conservation of activities and involvement of the central channel in DNA binding.

Structural and functional characterization of the Redβ recombinase from bacteriophage λ (2013)
Journal Article
Matsubara, K., Malay, A., Curtis, F., Sharples, G., & Heddle, J. (2013). Structural and functional characterization of the Redβ recombinase from bacteriophage λ. PLoS ONE, 8(11), Article e78869. https://doi.org/10.1371/journal.pone.0078869

The Red system of bacteriophage λ is responsible for the genetic rearrangements that contribute to its rapid evolution and has been successfully harnessed as a research tool for genome manipulation. The key recombination component is Redβ, a ring-sha... Read More about Structural and functional characterization of the Redβ recombinase from bacteriophage λ.

Mutants of phage bIL67 RuvC with enhanced Holliday junction binding selectivity and resolution symmetry (2013)
Journal Article
Green, V., Curtis, F., Sedelnikova, S., Rafferty, J., & Sharples, G. (2013). Mutants of phage bIL67 RuvC with enhanced Holliday junction binding selectivity and resolution symmetry. Molecular Microbiology, 89(6), 1240-1258. https://doi.org/10.1111/mmi.12343

Viral and bacterial Holliday junction resolvases differ in specificity with the former typically being more promiscuous, acting on a variety of branched DNA substrates, while the latter exclusively targets Holliday junctions. We have determined the c... Read More about Mutants of phage bIL67 RuvC with enhanced Holliday junction binding selectivity and resolution symmetry.

Electroless deposition of multi-functional zinc oxide surfaces displaying photoconductive, superhydrophobic, photowetting, and antibacterial properties (2012)
Journal Article
Wood, T., Hurst, G., Schofield, W., Thompson, R., Oswald, G., Evans, J., …Badyal, J. (2012). Electroless deposition of multi-functional zinc oxide surfaces displaying photoconductive, superhydrophobic, photowetting, and antibacterial properties. Journal of materials chemistry, 22(9), 3859-3867. https://doi.org/10.1039/c2jm14260k

The C-terminus of the phage λ Orf recombinase is involved in DNA binding (2010)
Journal Article
Curtis, F. A., Reed, P., Wilson, L. A., Bowers, L. Y., Yeo, R. P., Sanderson, J. M., Walmsley, A. R., & Sharples, G. J. (2011). The C-terminus of the phage λ Orf recombinase is involved in DNA binding. Journal of Molecular Recognition, 24(2), 333-340. https://doi.org/10.1002/jmr.1079

Phage λ Orf substitutes for the activities of the Escherichia coli RecFOR proteins in vivo and is therefore implicated as a recombination mediator, encouraging the assembly of bacterial RecA onto single-stranded DNA (ssDNA) coated with SSB. Orf exist... Read More about The C-terminus of the phage λ Orf recombinase is involved in DNA binding.

Novel antibiotics: C-2 symmetrical macrocycles inhibiting Holliday junction DNA binding by E. coli RuvC. (2006)
Journal Article
Pan, P., Curtis, F., Carroll, C., Medina, I., Rodrigeuz, R., Liotta, L., …McAlpine, S. (2006). Novel antibiotics: C-2 symmetrical macrocycles inhibiting Holliday junction DNA binding by E. coli RuvC. Bioorganic and Medicinal Chemistry, 14(14), 4731-4739. https://doi.org/10.1016/j.bmc.2006.03.028

Holliday junctions (HJs) are formed as transient DNA intermediates during site-specific and homologous recombination. Both of these genetic exchange pathways are critical for normal DNA metabolism and repair. Trapping HJs leads to bacterial cell deat... Read More about Novel antibiotics: C-2 symmetrical macrocycles inhibiting Holliday junction DNA binding by E. coli RuvC..

The RuvAB branch migration translocase and RecU Holliday junction resolvase are required for double-stranded DNA break repair in Bacillus subtilis. (2005)
Journal Article
Sanchez, H., Kidane, D., Reed, P., Curtis, F., Cozar, M., Graumann, P., …Alonso, J. (2005). The RuvAB branch migration translocase and RecU Holliday junction resolvase are required for double-stranded DNA break repair in Bacillus subtilis. Genetics, 171, 873-883

In models of Escherichia coli recombination and DNA repair, the RuvABC complex directs the branch migration and resolution of Holliday junction DNA. To probe the validity of the E. coli paradigm, we examined the impact of mutations in DeltaruvAB and... Read More about The RuvAB branch migration translocase and RecU Holliday junction resolvase are required for double-stranded DNA break repair in Bacillus subtilis..

VceR regulates the vceCAB drug efflux pump operon of Vibrio cholerae by alternating between mutually exclusive conformations that bind either drugs or promoter DNA. (2005)
Journal Article
Borges-Walmsley, M., Du, D., McKeegan, K., Sharples, G., & Walmsley, A. (2005). VceR regulates the vceCAB drug efflux pump operon of Vibrio cholerae by alternating between mutually exclusive conformations that bind either drugs or promoter DNA. Journal of Molecular Biology, 349(2), 387-400

VceR, a member of the TetR family of transcriptional regulators, is a repressor of the vceCAB operon, which encodes a multidrug efflux pump in Vibrio cholerae. VceR binds to a 28 bp inverted-repeat within the vceR-vceC intergenic region and is dissoc... Read More about VceR regulates the vceCAB drug efflux pump operon of Vibrio cholerae by alternating between mutually exclusive conformations that bind either drugs or promoter DNA..

Conservation of RecG activity from pathogens to hyperthermophiles. (2005)
Journal Article
Wen, Q., Mahdi, A., Briggs, G., Sharples, G., & Lloyd, R. (2005). Conservation of RecG activity from pathogens to hyperthermophiles. DNA Repair, 4, 23-31

Maintaining the integrity of the genome is essential for the survival of all organisms. RecG helicase plays an important part in this process in Escherichia coli, promoting recombination and DNA repair, and providing ways to rescue stalled replicatio... Read More about Conservation of RecG activity from pathogens to hyperthermophiles..

Functional similarities between phage lambda Orf and Escherichia coli RecFOR in initiation of genetic exchange (2005)
Journal Article
Maxwell, K., Reed, P., Zhang, R., Beasley, S., Walmsley, A., Curtis, F., …Sharples, G. (2005). Functional similarities between phage lambda Orf and Escherichia coli RecFOR in initiation of genetic exchange. Proceedings of the National Academy of Sciences, 102(32), 11260-11265. https://doi.org/10.1073/pnas.0503399102

Genetic recombination in bacteriophage lambda relies on DNA end processing by Exo to expose 3'-tailed strands for annealing and exchange by beta protein. Phage lambda encodes an additional recombinase, Orf, which participates in the early stages of r... Read More about Functional similarities between phage lambda Orf and Escherichia coli RecFOR in initiation of genetic exchange.

Evolution of a phage RuvC endonuclease for resolution of both Holliday and branched DNA junctions (2005)
Journal Article
Curtis, F., Reed, P., & Sharples, G. (2005). Evolution of a phage RuvC endonuclease for resolution of both Holliday and branched DNA junctions. Molecular Microbiology, 55(5), 1332-1345. https://doi.org/10.1111/j.1365-2958.2004.04476.x

Resolution of Holliday junction recombination intermediates in most Gram-negative bacteria is accomplished by the RuvC endonuclease acting in concert with the RuvAB branch migration machinery. Gram-positive species, however, lack RuvC, with the excep... Read More about Evolution of a phage RuvC endonuclease for resolution of both Holliday and branched DNA junctions.

Novel antibiotics: second generation macrocyclic peptides designed to trap Holliday junctions. (2004)
Journal Article
Liotta, L., Medina, I., Robinson, J., Carroll, C., Pan, P., Corral, R., …McAlpine, S. (2004). Novel antibiotics: second generation macrocyclic peptides designed to trap Holliday junctions. Tetrahedron Letters, 45, 8447-8450. https://doi.org/10.1016/j.tetlet.2004.09.084

Described are the syntheses of 15 macrocyclic peptides designed to trap Holliday junctions(HJs) in bacteria during site-specific and homologous recombination. This leads to inhibiting bacterial growth. These second generation macrocycles were based o... Read More about Novel antibiotics: second generation macrocyclic peptides designed to trap Holliday junctions..

Holliday Junction Binding and Resolution by the Rap Structure-specific Endonuclease of Phage lambda (2004)
Journal Article
Sharples, G., Curtis, F., McGlynn, P., & Bolt, E. (2004). Holliday Junction Binding and Resolution by the Rap Structure-specific Endonuclease of Phage lambda. Journal of Molecular Biology, 340(4), 739-751. https://doi.org/10.1016/j.jmb.2004.05.030

Rap endonuclease targets recombinant joint molecules arising from phage lambda Red-mediated genetic exchange. Previous studies revealed that Rap nicks DNA at the branch point of synthetic Holliday junctions and other DNA structures with a branched co... Read More about Holliday Junction Binding and Resolution by the Rap Structure-specific Endonuclease of Phage lambda.