Abstract：
:Clostridium taeniosporum is a Gram-positive, anaerobic, rod-shaped non-toxigenic organism isolated from Crimean lake silt. It is unique in forming spores from which about twelve large, flat, ribbon-like appendages emanate. These ribbon-like structures, about 4.5 microm long and 0.45 microm wide, are assembled from smaller fibrils with 5 nm diameter spherical heads attached to thin tails about 1-2 nm in diameter and about 40 nm in length. The appendages have four major components, a glycoprotein with a collagen-like region, two proteins each of which contains two conserved domains of unknown function, and an ortholog of the Bacillus subtilis spore morphogenetic protein SpoVM. Genes for three of these and other, possibly related proteins, cluster on two chromosome fragments. Here we report that C. taeniosporum is saccharolytic, non-proteolytic, and produces both acetic and butyric acid fermentation products. It synthesizes alpha-D-glucosidase and N-acetyl-beta,D-glucoseaminidase constitutively. These physiological properties are similar to those of the C. botulinum Group II. Genotypically, C. taeniosporum is also closely related to the same Group II, based on 16S rDNA sequences. C. taeniosporum differs from typical C. botulinum Group II strains because it is non-toxigenic and in forming the ribbon-like spore appendages. These major differences among otherwise closely related organisms suggest lateral transfer of genes for appendage synthesis and for toxigenicity.
journal_name
Anaerobejournal_title
Anaerobeauthors
Iyer AV,Blinkova AL,Yang SY,Harrison M,Tepp WH,Jacobson MJ,Johnson EA,Bennett GN,Walker JRdoi
10.1016/j.anaerobe.2008.11.004subject
Has Abstractpub_date
2008-12-01 00:00:00pages
318-24issue
6eissn
1075-9964issn
1095-8274pii
S1075-9964(08)00117-0journal_volume
14pub_type
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