Abstract：
:Cyanothece sp. strain ATCC 51142 is an aerobic, unicellular, diazotrophic cyanobacterium that temporally separates O2-sensitive N2 fixation from oxygenic photosynthesis. The energy and reducing power needed for N2 fixation appears to be generated by an active respiratory apparatus that utilizes the contents of large interthylakoidal carbohydrate granules. We report here on the carbohydrate and protein composition of the granules of Cyanothece sp. strain ATCC 51142. The carbohydrate component is a glucose homopolymer with branches every nine residues and is chemically identical to glycogen. Granule-associated protein fractions showed temporal changes in the number of proteins and their abundance during the metabolic oscillations observed under diazotrophic conditions. There also were temporal changes in the protein pattern of the granule-depleted supernatant fractions from diazotrophic cultures. None of the granule-associated proteins crossreacted with antisera directed against several glycogen-metabolizing enzymes or nitrogenase, although these proteins were tentatively identified in supernatant fractions. It is suggested that the granule-associated proteins are structural proteins required to maintain a complex granule architecture.
journal_name
Arch Microbioljournal_title
Archives of microbiologyauthors
Schneegurt MA,Sherman DM,Sherman LAsubject
Has Abstractpub_date
1997-02-01 00:00:00pages
89-98issue
2-3eissn
0302-8933issn
1432-072Xjournal_volume
167pub_type
杂志文章abstract：:Bacteria in Lactobacillus casei group, including Lactobacillus casei (L. casei), Lactobacillus paracasei (L. paracasei), and Lactobacillus rhamnosus (L. rhamnosus) are important lactic acid bacteria in the production of fermented dairy products and are faced with the controversial nomenclatural status due to their clo...
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pub_type： 杂志文章
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journal_title：Archives of microbiology
pub_type： 杂志文章
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pub_type： 杂志文章
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更新日期：2004-01-01 00:00:00
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pub_type： 杂志文章
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更新日期：1997-07-01 00:00:00
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