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  Three-dimensional structure of the tetragonal surface layer of Sporosarcina ureae

Engelhardt, H., Saxton, W. O., & Baumeister, W. (1986). Three-dimensional structure of the tetragonal surface layer of Sporosarcina ureae. Journal of Bacteriology., 168(1), 309-317.

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Engelhardt, H.1, Autor           
Saxton, W. O.1, Autor           
Baumeister, W.1, Autor           
Affiliations:
1External Organizations, ou_persistent22              

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Schlagwörter: Bacterial Proteins; *Gram-Positive Bacteria/ul [Ultrastructure]; Image Processing, Computer-Assisted; Microscopy, Electron; Protein Conformation; Spectrophotometry, Infrared
 Zusammenfassung: The three-dimensional structure of the regular surface layer of Sporosarcina ureae has been determined to a resolution of 1.7 nm by electron microscopy and image reconstruction. The S-layer has p4 symmetry, a lattice constant of 12.9 nm, and a minimum thickness of 6.6 nm. The reconstruction reveals a distinct domain structure: a massive core, arms connecting adjacent unit cells, and spurs which make contact at the subsidiary fourfold symmetry axes. In the z-direction the domains appear to be arranged in three planes, creating two entirely different surface reliefs. The S-layer has a complex pattern of pores and gaps that are 2 to 3 nm wide. In addition, the secondary-structure composition has been determined by infrared spectroscopy: about 35% of the polypeptide appears to have a beta-structure conformation.

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 Datum: 1986
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: eDoc: 318750
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Titel: Journal of Bacteriology.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 168 (1) Artikelnummer: - Start- / Endseite: 309 - 317 Identifikator: -