Ken Fields Lab @
University of Kentucky
Unlocking the Unknown in Chlamydial Biology
Department of Microbiology, Immunology, & Molecular Genetics
UK College of Medicine
Twitter @FieldsLab
Vice Chair Appointment
November 1, 2021
Gabrielle Keb, PhD
June 8, 2021
Gabrielle Keb Sucessfully defends her dissertation and receives her PhD in Microbiology!
What We Do
Research Description:
The bacterium Chlamydia trachomatis is an agent of sexually transmitted disease and represents the number one infectious agent reportable to the U.S. Centers for Disease Control. Primary infections do not elicit long-term protective immunity, re-infections are common, and C. trachomatis has a tremendous negative impact on human reproductive health world-wide. Chlamydiae are spherical, obligate intracellular pathogens that parasitize human cells from within specialized vacuoles termed inclusions. The capacity to cause disease depends directly on the ability of chlamydiae to establish and maintain this protected intracellular niche.
The Fields lab focuses on understanding how chlamydial infections result in disease by elucidating the molecular mechanisms employed by Chlamydia spp. to subvert and evade host defenses. Effort is focused on understanding how the chlamydial type III secretion system is employed to manipulate host cell biology. We are particularly intereseted in understanding what anti-host proteins are being secreted, what host cell pathways are targeted, and how overall secretion activity is linked to the chlamydial developmental cycle.
Grants:
NIH RO1AI065530. Type III exported effectors of Chlamydia trachomatis.
NIH R21AI144648. Conditional null mutants in the study of essential gene products of Chlamydia.
NIH F31AI147147-01. (Gabrielle Keb). Chlamydia trachomatis Secreted Effector Proteins: Infection Properties and Identification of Host Targets.
Welcome to the Lab!
Get a brief glimpse into the lab with this video tour provided by our Senior Graduate Student, Gabrielle Keb.
Recent Publications
Learn more about our work.
Markerless Gene Deletion by Floxed Cassette Allelic Exchange Mutagenesis in Chlamydia Trachomatis
Keb G, Fields KA. Markerless Gene Deletion by Floxed Cassette Allelic Exchange Mutagenesis in Chlamydia trachomatis. J Vis Exp. 2020;(155):10.3791/60848. Published 2020 Jan 30. doi:10.3791/60848
https://pubmed.ncbi.nlm.nih.gov/32065159/
JoVE Video
Floxed-cassette allelic exchange mutagenesis enables marker-less gene deletion in Chlamydia trachomatis and reverses polar effects on down-stream genes
Keb, G., Hayman, R., and K.A.Fields. 2018. Floxed-cassette allelic exchange mutagenesis enables marker-less gene deletion in Chlamydia trachomatis and reverses polar effects on down-stream genes. J. Bacteriol. JB.00479-18. doi: 10.1128/JB.00479-18.
https://pubmed.ncbi.nlm.nih.gov/30224436/
Gene Deletion by Fluorescence-Reported Allelic Exchange Mutagenesis (FRAEM) in Chlamydia trachomatis
Mueller, K.E., Wolf, K., and K.A. Fields. 2016. Gene Deletion by Fluorescence-Reported Allelic Exchange Mutagenesis (FRAEM) in Chlamydia trachomatis. mBio. e01817-15.
https://pubmed.ncbi.nlm.nih.gov/26787828/
A working model for the type III secretion mechanism in Chlamydia
Ferrell, J.C. and K.A. Fields. 2015. A working model for the type III secretion mechanism in Chlamydia. Microbes Infect. Doi 10.1016/j.micinf.2015.10.006.
https://pubmed.ncbi.nlm.nih.gov/26515030/
Application of β-lactamase reporter fusions as an indicator of effector protein secretion during infections with the obligate intracellular pathogen Chlamydia trachomatis
Mueller, K.E. and K.A. Fields. 2015. Application of β-lactamase reporter fusions as an indicator of effector protein secretion during infections with the obligate intracellular pathogen Chlamydia trachomatis. PLos ONE. 10:e0135295.
https://pubmed.ncbi.nlm.nih.gov/26258949/
The Fields Lab Team
As of Summer 2020