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Related Experiment Videos

Eubacterial origin of chlamydiae.

W G Weisburg, T P Hatch, C R Woese

    Journal of Bacteriology
    |August 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    The 16S rRNA gene sequence of Chlamydia psittaci reveals it belongs to a novel major eubacterial group. This group, lacking peptidoglycan in cell walls, may be distantly related to planctomyces.

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    Identification of polymorphic outer membrane proteins of Chlamydia psittaci 6BC.

    Infection and immunity·2001

    Area of Science:

    • Microbiology
    • Genomics
    • Evolutionary Biology

    Background:

    • Chlamydia psittaci is an important bacterial pathogen.
    • The phylogenetic position of Chlamydia psittaci has been unclear.
    • Understanding bacterial phylogeny is crucial for classification and understanding evolution.

    Purpose of the Study:

    • To determine the 16S rRNA gene sequence of Chlamydia psittaci.
    • To ascertain the phylogenetic placement of Chlamydia psittaci within the bacterial domain.
    • To investigate potential evolutionary relationships with other bacterial groups.

    Main Methods:

    • DNA sequencing of the 16S rRNA gene from Chlamydia psittaci.
    • Bioinformatic analysis and comparison of the obtained sequence with a comprehensive database of known 16S rRNA sequences.

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    Main Results:

    • The 16S rRNA gene sequence confirms Chlamydia psittaci is eubacterial.
    • A previously unrecognized major eubacterial group was identified, including Chlamydia psittaci.
    • This new group shows a potential peripheral relationship to planctomyces and relatives.
    • A shared characteristic of peptidoglycan-absent cell walls was noted in both groups.

    Conclusions:

    • Chlamydia psittaci represents a distinct and significant lineage within the Eubacteria.
    • The findings suggest a distant evolutionary link between Chlamydia psittaci and planctomyces.
    • The absence of peptidoglycan in cell walls is a notable shared trait, despite phenotypic differences.