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Chi-Yung Lai, L. Baumann, P. Baumann (1994)
Amplification of trpEG: adaptation of Buchnera aphidicola to an endosymbiotic association with aphids.Proceedings of the National Academy of Sciences of the United States of America, 91 9
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Nutritional interactions of insect - microbial symbioses : aphids and their symbiotic bacteria
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NADPH: ferredoxin oxidoreductase acts as a paraquat diaphorase and is a member of the soxRS regulon.Proceedings of the National Academy of Sciences of the United States of America, 91
P. Baumann, L. Baumann, Chi-Yung Lai, D. Rouhbakhsh, N. Moran, M. Clark (1995)
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Evolution of the tryptophan biosynthetic pathway in Buchnera (aphid endosymbionts): studies of plasmid-associated trpEG within the genus Uroleucon.Molecular phylogenetics and evolution, 8 2
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C. Lai, P. Baumann, N. Moran (1996)
The endosymbiont (Buchnera sp.) of the aphid Diuraphis noxia contains plasmids consisting of trpEG and tandem repeats of trpEG pseudogenesApplied and Environmental Microbiology, 62
Irving Crawford (1989)
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C. Lai, P. Baumann, N. Moran (1995)
Genetics of the tryptophan biosynthetic pathway of the prokaryotic endosymbiont (Buchnera) of the aphid Schlechtendalia chinensis.Insect molecular biology, 4 1
M. Munson, P. Baumann (1993)
Molecular cloning and nucleotide sequence of a putative trpDC(F)BA operon in Buchnera aphidicola (endosymbiont of the aphid Schizaphis graminum)Journal of Bacteriology, 175
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Function and regulation of the heat shock proteins
Chi-Yung Lai, P. Baumann, Nancy Moran (1995)
of the aphid Schlechtendalia chinensisInsect Molecular Biology, 4
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Vera Bianchi, Peter Reichard, R. Eliasson, E. Pontis, M. Krook, Hans Jörnvall, E. Haggård-Ljungquist (1993)
Escherichia coli ferredoxin NADP+ reductase: activation of E. coli anaerobic ribonucleotide reduction, cloning of the gene (fpr), and overexpression of the proteinJournal of Bacteriology, 175
L. Baumann, M. Clark, D. Rouhbakhsh, P. Baumann, N. Moran, D. Voegtlin (1997)
Endosymbionts (Buchnera) of the Aphid Uroleucon sonchi Contain Plasmids with trpEG and Remnants of trpE PseudogenesCurrent Microbiology, 35
(1993)
Molecular cloning and nucleotide sequence of a putative trpD(C)FBAoperon inBuchnera aphidicola (endosymbiont of the aphidSchizaphis graminum
Buchnera are prokaryotic endosymbionts found in most aphids. One of their functions is the synthesis of the essential amino acid tryptophan for the aphid host. In Buchnera from some aphids that have a long development time, trpEG, which encodes the first enzyme of the tryptophan biosynthetic pathway (anthranilate synthase), is found as one copy on the endosymbiont chromosome and is located between hsIU and fpr. In Buchnera from Schizaphis graminum, which has a short development time, trpEG is amplified on plasmids. We have cloned and sequenced a 4.1-kb DNA fragment from Buchnera of S. graminum and have found the gene order hsIU-ibp-fpr-yjeA-kdtB. The proximity of hsIU and fpr is consistent with the excision, in an endosymbiont ancestor, of trpEG from a location between these two genes, with the excision either followed or preceded by acquisition of ibp.
Current Microbiology – Springer Journals
Published: May 1, 1999
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