Chemotactic signalling in Rhodobacter sphaeroides requires metabolism of attractants
نویسندگان
چکیده
منابع مشابه
Role of metabolism in the chemotactic response of Rhodobacter sphaeroides to ammonia.
Rhodobacter sphaeroides only showed chemotaxis towards ammonia if grown under nitrogen-limited conditions. This chemotactic response was completely inhibited by the addition of methionine sulfoximine. There was no effect of methionine sulfoximine treatment on motility or taxis towards propionate, demonstrating that the effect is specific to ammonia taxis. It is known that methionine sulfoximine...
متن کاملChemotaxis in Rhodobacter sphaeroides requires an atypical histidine protein kinase.
Rhodobacter sphaeroides has a complex chemosensory system comprising two classic CheAs, two atypical CheAs, and eight response regulators (six CheYs and two CheBs). The classic CheAs, CheA(1) and CheA(2), have similar domain structures to Escherichia coli CheA, whereas the atypical CheAs, CheA(3) and CheA(4), lack some of the domains found in E. coli CheA. CheA(2), CheA(3), and CheA(4) are all ...
متن کاملIdentification of proteins involved in formaldehyde metabolism by Rhodobacter sphaeroides.
Formaldehyde is an intermediate formed during the metabolism of methanol or other methylated compounds. Many Gram-negative bacteria generate formaldehyde from methanol via a periplasmic pyrroloquinoline quinone (PQQ)-dependent dehydrogenase in which the alpha subunit of an alpha(2)beta(2) tetramer has catalytic activity. The genome of the facultative formaldehyde-oxidizing bacterium Rhodobacter...
متن کاملMetabolism is required for chemotaxis to sugars in Rhodobacter sphaeroides.
Chemotaxis towards carbohydrates is mediated, in enteric bacteria, either by the transport-independent, methylation-dependent chemotaxis pathway or by transport and phosphorylation via the phosphoenolpyruvate (PEP)-dependent phosphotransferase system (PTS). This study shows that Rhodobacter sphaeroides is chemotactic to a range of carbohydrates but the response involves neither the classical me...
متن کاملOsmoregulation in Rhodobacter sphaeroides.
Betaine (N,N,N-trimethylglycine) functioned most effectively as an osmoprotectant in osmotically stressed Rhodobacter sphaeroides cells during aerobic growth in the dark and during anaerobic growth in the light. The presence of the amino acids L-glutamate, L-alanine, or L-proline in the growth medium did not result in a significant increase in the growth rate at increased osmotic strengths. The...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1993
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.175.1.291-294.1993