Outside diameter of cannulae (a network of tubules in which the cells grow)

Value 25 nm
Organism Archaea Pyrodictium abyssi
Reference Ng SY, Zolghadr B, Driessen AJ, Albers SV, Jarrell KF. Cell surface structures of archaea. J Bacteriol. 2008 Sep190(18):6039-47. doi: 10.1128/JB.00546-08 p.6042 left column 2nd paragraphPubMed ID18621894
Primary Source [65] Rieger, G., R. Rachel, R. Hermann, and K. O. Stetter. 1995. Ultrastructure of the hyperthermophilic archaeon Pyrodictium abyssi. J. Struct. Biol. 115: 78-87 link
Method Primary source abstract: "The ultrastructure of a new isolate of Pyrodictium abyssi, obtained from the Midatlantic Ridge at a depth of 3600 m, was studied by scanning and transmission electron microscopy using cryopreparation techniques."
Comments P.6042 left column 2nd paragraph: "Members of the genus Pyrodictium have been isolated from various hydrothermal marine environments all over the world (refs 72, 73), with growth temperatures ranging from 80 to up to 110°C. A unique feature of this group of organisms is that cells grow in a network of tubules termed cannulae (Fig. 4), which connect the cells with each other. Cannulae are hollow tubes with an outside diameter of 25 nm, and they appear empty when cross-fractured or thin-sectioned (primary source). They consist of at least three different, but homologous, glycoprotein subunits with identical N termini but with different molecular masses of 20, 22, and 24 kDa (ref 57, primary source)."
Entered by Uri M
ID 116398