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POPULATION GENETICS AND EVOLUTION

Natural Isolates of Salmonella enterica Serovar Dublin Carry a Single nadA Missense Mutation

Ulfar Bergthorsson, John R. Roth
Ulfar Bergthorsson
Department of Biology, University of Utah, Salt Lake City, Utah
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John R. Roth
Department of Biology, University of Utah, Salt Lake City, Utah
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  • For correspondence: jrroth@ucdavis.edu
DOI: 10.1128/JB.187.1.400-403.2005
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Tables

  • TABLE 1.

    Polymorphic sites in nadA of serovar Typhimurium, Typhi, and Dublin isolates

    Serovar or strainNadPolymorphic codona
    72435687683102103104108111b142190195198208220231260274275276278279282283285287289291292296303330333334347
    Typhimurium+ CCA GAT CGG TCA ACG CTG AAG ACC ATT ACC GCG ACC GGG TGC GGA ACT GAT CAG GTG GTG CCT GAA GAA CTG GCG CCC GCT GAG GCG TGC CGT CAC AAT GGC CTG CCG GCG
    SARB12− --- --C --T --G G-- T-A --A -A- --- --G -T- -T- --- --T --G --C T-- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
    SARB13− --- --C --T --G G-- T-A --A -A- --- --G -T- --- --- --T --G --C T-- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
    SARB14+ --- --- --- --- G-- --- --- --- --- --G --- --- --- --T --G --C --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
    TR7209− --- --C --T --G G-- T-A --A -A- --- --G -T- -T- --- --T --G --C T-- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
    TR7211− --- --C --T --G G-- T-A --A -A- --- --G -T- -T- --- --T --G --C T-- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
    TR7275 Rev+ --- --C --T --G G-- T-A --A -A- --- --G --- -T- --- --T --G --C T-- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
    TR7276 Rev+ --- --C --T --G G-- T-A --A -A- --- --G --- -T- --- --T --G --C T-- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
    Typhi− T-- --C --T --G G-- T-A --A -A- G-- --G -T- --- A-- --T --G --C --- -C- --C --T --G --T --G T-- --A --A --G --A --A --T --C --T --C -GC --T --C -T-
    • ↵ a All sequences are compared to that of S. enterica (serovar Typhimurium, LT2). Dashes indicate identity; indicated bases show differences. Only polymorphic sites are listed.

    • ↵ b TR7275 and TR7276 are independent Nad+ revertants of serovar Dublin auxotroph TR7209.

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Natural Isolates of Salmonella enterica Serovar Dublin Carry a Single nadA Missense Mutation
Ulfar Bergthorsson, John R. Roth
Journal of Bacteriology Dec 2004, 187 (1) 400-403; DOI: 10.1128/JB.187.1.400-403.2005

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Natural Isolates of Salmonella enterica Serovar Dublin Carry a Single nadA Missense Mutation
Ulfar Bergthorsson, John R. Roth
Journal of Bacteriology Dec 2004, 187 (1) 400-403; DOI: 10.1128/JB.187.1.400-403.2005
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  • Article
    • ABSTRACT
    • (i) Relaxed selection for prototrophy.
    • (ii) Conditional auxotrophy.
    • (iii) Selection for auxotrophy.
    • (iv) Mutation pressure.
    • Auxotrophy of serovar Dublin isolates.
    • Reversion tests.
    • Initial evidence for a nadA mutation.
    • The serovar Dublin nadA allele is necessary and sufficient for auxotrophy.
    • Comparing nadA sequences of enteric bacteria.
    • A search for conditions that suppress the auxotrophy of serovar Dublin.
    • Pyridine limitation does not provide antibiotic resistance in serovar Dublin.
    • Frequency of Nad auxotrophs in natural isolates of S. enterica and E. coli.
    • Natural auxotrophy is not associated with mutators or hot spots.
    • Summary.
    • ACKNOWLEDGMENTS
    • FOOTNOTES
    • REFERENCES
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KEYWORDS

Mutation, Missense
NAD
Salmonella enterica

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