Research Lab Members:
Coughlin, Laura
Fisher, Carolyn
Gore, Aja
Helton, Emily
Ma, Li
Marman, Hannah
Mey, Alexandra
Wyckoff, Elizabeth
Research Summary:
We are interested in the genetics and regulation of virulence factors of gram negative pathogens, including Shigella and Vibrio cholerae.
Members of the Shigella species are found both extracellularly and intracellularly within the host, and distinct sets of genes are expressed in each of these environments. We are studying bacterial gene expression in vivo by a variety of molecular and microscopic techniques, and we have identified genes that are required for growth in the intracellular environment of the host. Bacterial genes found to be important for growth and survival in vivo include those that encode components of iron transport systems and those required for expression and localization of cell surface proteins.
Publications:
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2009
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Fisher CR, Davies NM, Wyckoff EE, Feng Z, Oaks EV, Payne SM,
Genetics and virulence association of the Shigella flexneri sit iron transport system,
Infect. Immun.
77:
1992-1999
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2009
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Wyckoff EE, Boulette ML, Payne SM,
Genetics and environmental regulation of Shigella iron transport systems,
Biometals
22:
43-51
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2009
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Be'er A, Zhang HP, Florin EL, Payne SM, Ben-Jacob E, Swinney HL,
Deadly competition between sibling bacterial colonies,
Proc Natl Acad Sci U S A
106:
428-433
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2008
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Mey AR, Wyckoff EE, Hoover LA, Fisher CR, Payne SM,
Vibrio cholerae VciB promotes iron uptake via ferrous iron transporters,
J. Bacteriology
190:
5953-5962
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2007
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Boulette, M.L. and S.M. Payne,
Anaerobic regulation of Shigella flexneri virulence:ArcA regulates fur and iron acquisition genes,
J. Bacteriology
189:
6957-6967
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2007
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Wyckoff, E.E., A.R. Mey and S.M. Payne,
iron acquisition in Vibrio cholerae,
Biometals
20:
405-416
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2007
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Kresse A. U., I. Reinacker, A.M. Valle, H. Steinruck, H. Claus, S.M. Payne, H. Tschape, P.H. Williams, R. Reissbrodt,
Enterohaemorrhagic Escherichia coli O157 and non- 0157 serovars differ in their mechanisms for iron supply,
Int. J. Med. Microbiol.
297:
9-158
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2007
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Bhadra, S., M. Lozano, S. M. Payne, and J. P. Dudley,
A Unique Mechanism of Resistance to Viral and Bacterial Pathogens,
PLoS Pathogens
2:
e128
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2007
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Murphy, E.R. and S. M. Payne,
RyhB, an iron-responsive small RNA, regulates Shigella virulence ,
Infect. immun.
75:
3470-3477
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2007
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Purdy, G., C. Fisher and S. M. Payne,
IcsA surface presentation in S. flexneri requires the periplasmic chaperones DegP, Skp and SurA,
J. Bacteriol.
189:
5566-5573
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2006
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Wycoff, E.E., A.R. Mey, A. Leimbach, C.F. Fisher and S.M. Payne,
Characterization of ferric and ferrous iron transport systems in Vibrio Cholerae,
J. Bact.
188:
6515-6523
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2006
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Sharma, A.K. and S. M. Payne,
Induction of expression of hfq by DksA is essential for Shigella flexneri virulence,
Mol. MIcrobiol.
62:
463-479
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2005
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Runyen-Janecky L.J., A. M. Boyle, A. Kizzee, L. Liefer, S. M. Payne,
Role of the Pst system in plaque formation by the intracellular pathogen Shigella flexneri,
Infect. Immun.
73:
1404-1410
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2005
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Mey, A. R., E. E. Wyckoff, V. Kanukurthy, C. R. Fisher and S. M. Payne,
Iron and Fur regulation in Vibrio cholerae and the role of Fur in virulence,
Infect. Immun.
73:
8167-8178
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2005
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Oglesby, A. G., E. R. Murphy, V. R. Iyer, and S. M. Payne,
Fur regulates acid resistance in Shigella flexneri via RyhB and ydeP,
Mol. Microbiol.
58:
1354-1367
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2005
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Mey, A. R., S. A. Craig, and S. M. Payne,
Characterization of V. cholerae RyhB: the RyhB regulon and the role of ryhB in biofilm formation,
Infect. Immun.
73:
5706-5719
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2004
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Wyckoff, E.E., M. Schmitt, A., Wilks, S.M. Payne,
HutZ is required for efficient heme utilization in Vibrio cholerae,
J. Bacteriol.
186:
4142-4151
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2003
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Wei, J., et al.,
Complete genome sequence and comparative genomics of Shigella flexneri serotype 2a strain 2457T,
Infect. Immun.
71:
2775-2786
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2003
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Mey, A.R. and S.M. Payne,
Analysis of residues determining specificity of V. cholerae TonB1 for its receptors,
J. Bacteriol.
185:
1195-1207
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2003
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Runyen-Janecky, L.S. Reeves, E. Gonzales, and S.M. Payne,
Contribution of the Shigella flexneri Sit, Iuc, and Feo iron acquisition systems to iron acquisition in vitro and in cultured cells,
Infect. Immun.
71:
1919-1928
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