Tryptophan operon diversity reveals evolutionary trends among geographically disparate Chlamydia trachomatis ocular and urogenital strains affecting tryptophan …

S Bommana, N Somboonna, G Richards, M Tarazkar… - Mbio, 2021 - Am Soc Microbiol
The obligate intracellular pathogen Chlamydia trachomatis (Ct) is the leading cause of
bacterial sexually transmitted infections and blindness globally. To date, Ct urogenital …

Clinical persistence of Chlamydia trachomatis sexually transmitted strains involves novel mutations in the functional αββα tetramer of the tryptophan synthase operon

N Somboonna, N Ziklo, TE Ferrin, J Hyuk Suh, D Dean - MBio, 2019 - Am Soc Microbiol
Clinical persistence of Chlamydia trachomatis (Ct) sexually transmitted infections (STIs) is a
major public health concern. In vitro persistence is known to develop through interferon …

[HTML][HTML] Genetic Transformation of a C. trachomatis Ocular Isolate With the Functional Tryptophan Synthase Operon Confers an Indole-Rescuable Phenotype

CE O'Neill, RJ Skilton, SA Pearson, S Filardo… - Frontiers in cellular …, 2018 - frontiersin.org
Chlamydia trachomatis is the leading cause of preventable blindness and the most common
bacterial sexually transmitted infection. Different strains are associated with ocular or …

Ammonia generation by tryptophan synthase drives a key genetic difference between genital and ocular Chlamydia trachomatis isolates

SP Sherchand, A Aiyar - Proceedings of the National …, 2019 - National Acad Sciences
A striking difference between genital and ocular clinical isolates of Chlamydia trachomatis is
that only the former express a functional tryptophan synthase and therefore can synthesize …

Polymorphisms in Chlamydia trachomatis tryptophan synthase genes differentiate between genital and ocular isolates

HD Caldwell, H Wood, D Crane… - The Journal of …, 2003 - Am Soc Clin Investig
We previously reported that laboratory reference strains of Chlamydia trachomatis differing
in infection organotropism correlated with inactivating mutations in the pathogen's …

How Chlamydia trachomatis conquered gut microbiome-derived antimicrobial compounds and found a new home in the eye

A Banerjee, DE Nelson - Proceedings of the National …, 2019 - National Acad Sciences
Different variants of the obligate intracellular bacterial pathogen Chlamydia trachomatis
cause the diseases trachoma and chlamydia. The trachoma strains cause chronic infections …

[HTML][HTML] The role of tryptophan in Chlamydia trachomatis persistence

L Wang, YL Hou, HX Yuan, H Chen - Frontiers in Cellular and …, 2022 - frontiersin.org
Chlamydia trachomatis (C. trachomatis) is the most common etiological agent of bacterial
sexually transmitted infections (STIs) and a worldwide public health issue. The natural …

The iron-dependent repressor YtgR is a tryptophan-dependent attenuator of the trpRBA operon in Chlamydia trachomatis

ND Pokorzynski, ND Hatch, SP Ouellette… - Nature …, 2020 - nature.com
The trp operon of Chlamydia trachomatis is organized differently from other model bacteria.
It contains trpR, an intergenic region (IGR), and the biosynthetic trpB and trpA open-reading …

A bipartite iron-dependent transcriptional regulation of the tryptophan salvage pathway in Chlamydia trachomatis

ND Pokorzynski, AJ Brinkworth, R Carabeo - Elife, 2019 - elifesciences.org
During infection, pathogens are starved of essential nutrients such as iron and tryptophan by
host immune effectors. Without conserved global stress response regulators, how the …

Dynamic diversity of the tryptophan pathway in chlamydiae: reductive evolution and a novel operon for tryptophan recapture

G Xie, CA Bonner, RA Jensen - Genome biology, 2002 - Springer
Background Complete genomic sequences of closely related organisms, such as the
chlamydiae, afford the opportunity to assess significant strain differences against a …