Chlamydia Psittaci Comparative Genomics Reveals Intraspecies Variations in the Putative Outer Membrane and Type III Secretion System Genes

Overview

Journal Microbiology (Reading)

Specialty Microbiology

Date 2015 Apr 19

PMID 25887617

Citations 15

Authors

Bernard J Wolff

Shatavia S Morrison

Denise Pesti

Satishkumar Ranganathan Ganakammal

Ganesh Srinivasamoorthy

Shankar Changayil

M Ryan Weil

Duncan MacCannell

Lori Rowe

Michael Frace

Branson W Ritchie

Deborah Dean

Jonas M Winchell

Affiliations

Soon will be listed here.

Abstract

Chlamydia psittaci is an obligate intracellular bacterium that can cause significant disease among a broad range of hosts. In humans, this organism may cause psittacosis, a respiratory disease that can spread to involve multiple organs, and in rare untreated cases may be fatal. There are ten known genotypes based on sequencing the major outer-membrane protein gene, ompA, of C. psittaci. Each genotype has overlapping host preferences and virulence characteristics. Recent studies have compared C. psittaci among other members of the Chlamydiaceae family and showed that this species frequently switches hosts and has undergone multiple genomic rearrangements. In this study, we sequenced five genomes of C. psittaci strains representing four genotypes, A, B, D and E. Due to the known association of the type III secretion system (T3SS) and polymorphic outer-membrane proteins (Pmps) with host tropism and virulence potential, we performed a comparative analysis of these elements among these five strains along with a representative genome from each of the remaining six genotypes previously sequenced. We found significant genetic variation in the Pmps and tbl3SS genes that may partially explain differences noted in C. psittaci host infection and disease.

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