ライフサイエンスコーパス: Buchnera

1 l DNA and plasmids of the symbiotic bacteria Buchnera).

2 mportant for E. coli translation are lost in Buchnera.

3 rocesses than do obligate symbionts, such as Buchnera.

4 t upon the essential amino acids produced by Buchnera.

5 gene that is constitutively overexpressed in Buchnera.

6 force driving base composition evolution in Buchnera.

7 possess intracellular bacteria of the genus Buchnera.

8 y cause of accelerated sequence evolution in Buchnera.

9 luding cut-down versions of the organelle in Buchnera, a dispensable ATPase and structural evidence f

10 Frequency of the heat-sensitive Buchnera allele is negatively correlated with presence o

11 me sequences of two different endosymbionts, Buchnera and a protist mitochondrion, with their close r

12 ss of transcription fidelity factors in both Buchnera and Carsonella.

13 th classical peptidoglycan such as Coxiella, Buchnera and members of the Rickettsia genus.

14 pecific, convergent, pattern of tRNA loss in Buchnera and other endosymbionts that have undergone gen

15 For six Blochmannia pairs, plus Buchnera and related enterobacteria, estimates of sequen

16 e an obligate association with the bacterium Buchnera aphidicola (the primary symbiont) that has been

17 gene function overlap with minimal genomes (Buchnera aphidicola and Mycoplasma genitalium).

18 ome evolution by sequencing seven strains of Buchnera aphidicola from pea aphid hosts.

19 The obligate endosymbiotic bacterium Buchnera aphidicola shows elevated rates of sequence evo

20 ed for horizontal transfer of plasmids among Buchnera aphidicola strains associated with ecologically

21 ) per nucleotide in mRNA of the endosymbiont Buchnera aphidicola to 5.2 x 10(-5) per nucleotide in rR

22 um) and its maternally transmitted symbiont, Buchnera aphidicola Using experimental crosses to identi

23 aphids, a clade of sap-feeding insects, and Buchnera aphidicola, a gammaproteobacterium that coloniz

24 eir obligate nutrient-provisioning symbiont, Buchnera aphidicola, aphids may also carry one or more f

25 ion on the dynamics of synonymous changes in Buchnera aphidicola, the AT-rich bacterial endosymbiont

26 iptional response to environmental stress in Buchnera aphidicola, the obligate endosymbiont of aphids

27 Buchnera aphidicola, the obligate symbiont of aphids, ha

28 we investigate whether divergent lineages of Buchnera aphidicola, the reduced-genome bacterial endosy

29 ding plant pests and harbor the endosymbiont Buchnera aphidicola, which is essential for their fecund

30 such association is that between aphids and Buchnera aphidicola, which produces essential amino acid

31 c association with the gamma-proteobacterium Buchnera aphidicola.

32 f several insect endosymbionts that included Buchnera aphidicola.

33 Three genome sequences are now available for Buchnera aphidicola.

34 es, including that of the aphid endosymbiont Buchnera aphidicola.

35 poorly and produce few or no offspring, and Buchnera are both unknown apart from aphids and apparent

36 Buchnera are maternally transmitted bacterial endosymbio

37 e nonessential amino acid pathways lost from Buchnera are up-regulated in bacteriocytes.

38 otheses for intraspecific polymorphism using Buchnera associated with natural populations of the ragw

39 ding the underlying mechanisms) in the aphid-Buchnera association and other insect symbioses with int

40 Buchnera cells are densely packed in specialized aphid b

41 For aphid endosymbionts (genus Buchnera), coding genes exhibit accelerated evolution an

42 monstrated accelerated sequence evolution in Buchnera compared to free-living bacteria, especially fo

43 The aphid-Buchnera endosymbiosis provides a powerful system to elu

44 Because Buchnera experiences population bottlenecks during trans

45 Buchnera from the aphids Schizaphis graminum and Diuraph

46 The bacterial endosymbionts (Buchnera) from the aphids Rhopalosiphum padi, R. maidis,

47 Polypeptides for all Buchnera genes analyzed have accumulated amino acids wit

48 single base deletions in homopolymers in the Buchnera genome, implying a strong selective benefit.

49 Buchnera genomes have eliminated most regulatory sequenc

50 Analyses of Buchnera genomes in comparison with those of related ent

51 se of this study, we reanalyzed variation at Buchnera groEL and found no evidence of positive selecti

52 ally distinct aphid lines harboring the same Buchnera haplotype.

53 This single base polymorphism in Buchnera has the potential to allow aphid populations to

54 Buchnera have been implicated in various non-nutritional

55 Genomic studies of Buchnera have provided a new means for inferring metabol

56 105 proteins, some of which originated from Buchnera, including the chaperonin GroEL.

57 ne, for which lower dN and dN/dS compared to Buchnera indicate exceptionally strong negative selectio

58 re a variant HindIII restriction site in the Buchnera leucine plasmid (pAPEleu), and two clones were

59 thetic genes to plasmids has been ongoing in Buchnera lineages after the infection of aphid hosts.

60 d strikingly low sequence diversity at three Buchnera loci (dnaN, trpBC, trpEG), revealing polymorphi

61 ctation, as found in recent studies of other Buchnera loci.

62 In Buchnera of many aphids, genes for biosynthesis of leuci

63 The related replicon in Buchnera of Pemphigidae, which lacks leuABCD, appears to

64 y resemble a plasmid previously described in Buchnera of the aphid Rhopalosiphum padi.

65 he basis for leu plasmid differences between Buchnera of Thelaxes suberi and Aphididae.

66 The prokaryotic endosymbionts (Buchnera) of aphids are known to provision their hosts w

67 BuchneraBASE is available at http://www.buchnera.org/.

68 ntegrated amino acid metabolism of the aphid-Buchnera partnership.

69 Phylogenetic congruence of Buchnera plasmid (trpEG and leuABC) and chromosomal (dna

70 F2 genotypes, the isoelectric points of the Buchnera proteins did not match those in the maternal Bu

71 proteins did not match those in the maternal Buchnera proteome as expected, but instead they aligned

72 expected, but instead they aligned with the Buchnera proteome of the transmission-competent paternal

73 of fixation (1.4 x 10(-3) substitutions per Buchnera replication) is much higher than the previously

74 ize, involving loss of most ancestral genes, Buchnera retains capabilities for biosynthesis of all es

75 Recent studies of intraspecific variation in Buchnera reveal patterns consistent with this hypothesis

76 Additionally, Buchnera's A + T compositional bias has resulted in redu

77 of these up-regulated genes fill the gaps of Buchnera's essential amino acid pathways.

78 Although Buchnera's genome encodes most genes for essential amino

79 ol for the genome of the symbiotic bacterium Buchnera sp. APS that includes an improved genome annota

80 ost bacterial taxa, the small genome size of Buchnera sp. was shown to be highly conserved across gen

81 s of nonsynonymous substitution rates across Buchnera species are strikingly low at groEL compared to

82 wise, stationarity of base composition among Buchnera species indicated equal rates of AT-->GC and GC

83 ->AT) at synonymous sites within and between Buchnera species, to test for selective preference versu

84 ported previously for the aphid endosymbiont Buchnera, suggests that genome stability characterizes l

85 Recent results for the aphid-Buchnera symbiosis and related systems illustrate that,

86 pothesis that translation is less optimal in Buchnera than in E. coli.

87 in the frequency of mutational categories in Buchnera than in parallel mammalian studies that documen

88 nlike ancient nutritional symbionts, such as Buchnera, that are obligate.

89 ation, two observations reported earlier for Buchnera, the apparent loss of a repair gene and the ove

90 Microarray analyses of the Buchnera transcriptome reveal only slight changes in exp

91 Buchnera tRNA genes are shorter than those of E. coli, a

92 heteroplasmic for a 0.76-kb deletion in the Buchnera tryptophan plasmid (pAPEtrp).

93 maternally inherited bacterial endosymbiont, Buchnera, were identified as differentially expressed be

94 mutation in an obligate bacterial symbiont (Buchnera), which has dramatic effects on the heat tolera

95 lied by the obligate bacterial endosymbiont (Buchnera), which lives inside specialized cells called b

96 All possess a primary endosymbiont, Buchnera, which compensates for dietary deficiencies; ma