Microtubule-like inclusions in isolates of the blue-green bacteria Anabaena and Nostoc.

Jensen, Thomas E.; Ayala, Robert P.

doi:10.1508/cytologia.45.315

Cited by 10 publications

(5 citation statements)

References 27 publications

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“…As such, it remains to be elucidated to what extent the ZicK/ZacK heteropolymer actually exists in Anabaena WT. Although, we could not identify any protein filaments in our ultrathin sections from Anabaena WT, other studies have previously described filamentous strings and even longitudinal cell-spanning polymers in multicellular Anabaena and Nostoc strains [65,66]. Despite compelling evidence for the existence of a cyanobacterial Z-ring structure during cell division (see for example [48,67]), no Z-ring ultrastructures have yet been identified and consequently, the absence of longitudinal ZicK/ZacK filaments in ultrathin sections does not rule out that they exist but could also indicate that they could not be visualized yet.…”

Section: Accepted Articlecontrasting

confidence: 73%

Two novel heteropolymer‐forming proteins maintain the multicellular shape of the cyanobacterium Anabaena sp. PCC 7120

et al. 2020

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Section: Accepted Articlecontrasting

confidence: 73%

Two novel heteropolymer‐forming proteins maintain the multicellular shape of the cyanobacterium Anabaena sp. PCC 7120

et al. 2020

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“…An ordered internal array of 10-to I a-nm-diameter doughnut-shaped paricles was demonstrated in the carboxysomes of Anacystis nidulans by Gantt & Conti (1969), although these workers did not consider the defining interface between the inclusion bodies and surrounding cytoplasm to be a limiting membrane. Evidence for a membrane surrounding unicellular cyanobacterial carboxysomes is also seen in the freeze-etch studies of the thermophile Synechococcus lividus (Holt & Edwards, I 972), in Anabaena subtropica (Jensen, 1979) and in the cyanobacterium which does not possess thylakoids, Gloeobacter oiolaceus (Guglielmi, Cohen-Bazire & Bryant, 1981). nidulans carboxysome does, however, resemble the Thiobacillus and Nitrobacter carboxysome membranes in general appearance and thickness (Gantt & Conti, 1969;Holt et al, 1974;Bock et al, 1974).…”

Section: ( B ) Cyanobacteriamentioning

confidence: 81%

“…nidulans carboxysome does, however, resemble the Thiobacillus and Nitrobacter carboxysome membranes in general appearance and thickness (Gantt & Conti, 1969;Holt et al, 1974;Bock et al, 1974). Evidence for a membrane surrounding unicellular cyanobacterial carboxysomes is also seen in the freeze-etch studies of the thermophile Synechococcus lividus (Holt & Edwards, I 972), in Anabaena subtropica (Jensen, 1979) and in the cyanobacterium which does not possess thylakoids, Gloeobacter oiolaceus (Guglielmi, Cohen-Bazire & Bryant, 1981).…”

Section: ( B ) Cyanobacteriamentioning

confidence: 99%

The Carboxysomes (Polyhedral Bodies) of Autotrophic Prokarygtes

Codd¹,

Marsden²

1984

Biological Reviews

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Summary 1. Polyhedral bodies are present in several groups of autotrophic bacteria that assimilate inorganic carbon via the Calvin cycle, including members of the colourless sulphur‐ oxidizing bacteria, ammonia‐ and nitrite‐oxidizing bacteria and all cyanobacteria (blue‐green algae) examined. Other groups of Calvin‐cycle bacteria lack the inclusions, which have not been found in the purple photosynthetic bacteria, or in the hydrogen bacteria, with one exception in each case. Polyhedral bodies also occur in the chlorophyll b‐containing photosynthetic symbiotic prokaryote, Prochloron, and in several cyanelles. The inclusion bodies have not been found in prokaryotes that cannot fix carbon dioxide via the Calvin cycle, or in eukaryotes. 2. Polyhedral bodies have been isolated from a colourless sulphur bacterium (Thiobacillus neapolitanus), two nitrifying bacteria (Nitrobacter agilis and Nitrosomonas sp.) and two cyanobacteria (Anabaena cylindrica and Chlorogloeopsis fritschii). Ribulose 1,5‐bisphosphate carboxylase/oxygenase (RuBisCO), the carbon dioxide‐fixing enzyme of the Calvin cycle, has been found in the polyhedral bodies in each case, confirming that these inclusions in autotrophic bacteria be re‐termed carboxysomes. 3. Knowledge of carboxysome composition has been constrained by difficulties in carboxysome isolation, although effective methods, including cell disruption in low‐ionic‐strength buffers followed by density‐gradient centrifugation through silicon polymers, or sucrose, followed be preparative agarose electrophoresis, are now available. 4. Analysis of isolated T. neapolitanus, N. agilis and C. fritschii carboxysomes by dissociating sodium dodecyl sulphate‐polyacrylamide gel electrophoresis has revealed the presence of 7–15 polypeptides, the most abundant being the large and small subunits of RuBisCO. Two polypeptides of the T. neapolitanus carboxysomes have been ascribed to the carboxysome membrane (shell), although the identity of other polypeptides is unknown. 5. DNA of unknown function has been reported in carboxysomes isolated from two Nitrobacter species and may be present in the organelles from T. neapolitanus. 6. RuBisCO occurs in both the carboxysomes and in soluble form in the cytoplasm of carboxysome‐containing bacteria. Structural, kinetic, regulatory and immunological comparisons have demonstrated full or near identity between the cytoplasmic and carboxysomal forms of the enzyme. As with RuBisCO from chloroplasts and from almost all non‐carboxysome‐containing bacteria, the cytoplasmic and carboxysomal RuBisCOs each consist of eight large plus eight small subunits. All RuBisCOs are bifunctional enzymes, oxygen acting as a competitive inhibitor of carboxylation, and carbon dioxide acting competitively to inhibit the apparently wasteful oxygenase reaction. Carbon dioxide and oxygen fixation occur at the same site on the large subunit. Despite extensive study, the function of the small subunits is unknown. All RuBisCOs can exist in an inactive and active form, activation proceeding by an ord...

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“…56, 6156, 59, 61, 56,61 56,61 56,61 56, 60,61 56, 57, 60, 56,61 34,56 34,56 34,56 34, 56 34,56 56, 57,69 34,56 34,56 34,56 34,56 34,56 34,56 56, 61,62 17, 56, 61, 56, 67,61 56,57 56, 57,61 56, 57,61 56, 57,61 13, 56,67 8, 34, 56,67 10,38 10, 90,98 50 136 10, 44, 90, 11, 35, 98 47, 49 Continued on following page MICROBIOL. REV.…”

mentioning

confidence: 99%

Do prokaryotes contain microtubules?

Bermudes¹,

Hinkle²,

Margulis³

1994

Microbiological Reviews

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Proteus mirabilis Vibrio mannus Vibrio psychroerythrus Chondromyces crocatus Myxococcus xanthus Anabaena sp. strains B-380 and B-381 Anabaena sp. strain B-378 Anabaena sp. strain 1448 Anabaena aequalis Anabaena catenula Anabaena cylindrica B-629, B381, and Wolk Anabaena minutissima Anabaena variabilis Calothrix sp. strain UTEX B1827 Calothrix sp. strain Cambridge 1410/6 Calothrix anomala Calothrix brevissima Calothrix javanica Calothrix marchica Calothrix membranacea Calothrix parientina Calothrix pulvinata Calothrix scopulonium Fremyella diplosiphon Gloeotrichia sp. strain UTEX

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Microtubule-like inclusions in isolates of the blue-green bacteria Anabaena and Nostoc.

Cited by 10 publications

References 27 publications

Two novel heteropolymer‐forming proteins maintain the multicellular shape of the cyanobacterium Anabaena sp. PCC 7120

Two novel heteropolymer‐forming proteins maintain the multicellular shape of the cyanobacterium Anabaena sp. PCC 7120

The Carboxysomes (Polyhedral Bodies) of Autotrophic Prokarygtes

Do prokaryotes contain microtubules?

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