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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Fujiyoshi, Y. Namba, K. Yamashita, I. Vonderviszt, F. Mimori-kiyosue, Y. |
| Description | Author Affiliation: Mimori-Kiyosue Y ( International Institute for Advanced Research, Matsushita Electric Industrial Co., Ltd., Seika, Japan.); |
| Abstract | We report the structures of flagellar filaments reconstituted from various flagellins with small terminal truncations. Flagellins from Salmonella typhimurium strains SJW1103 (wild type), SJW1660, and SJW1655 were used, which form a left-handed supercoil, the L- and R-type straight forms, respectively. Structure analyses were done by electron cryomicroscopy and helical image reconstruction with a help of x-ray fiber diffraction for determining precise helical symmetries. Truncation of either terminal region, irrespective of the original flagellin species, results in a straight filament having a helical symmetry distinct either from the L- or R-type. This filament structure is named Lt-type. Although the local subunit packing is similar in all three types, a close comparison shows that the Lt-type packing is almost identical to the R-type but distinct from the L-type, which demonstrates the strong two-state preference of the subunit interactions. The structure clearly suggests that both termini are located in the inner tube of the concentric double-tubular structure of the filament core, and their proper interaction is responsible for the correct folding of fairly large terminal regions that form the inner tube. The double tubular structure appears to be essential for the polymorphic ability of flagellar filaments, which is required for the swimming-tumbling of bacterial taxis. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 26 |
| Volume Number | 93 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1996-01-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Flagella Physiology Flagellin Chemistry Metabolism Salmonella Typhimurium Ultrastructure Fourier Analysis Microscopy, Electron Models, Structural X-Ray Diffraction Comparative Study Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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