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The Stringent Response of Helicobacter pylori

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Helicobacterpylori
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1. Abstract

2. Introduction

3. Results

(1) The H.pylori produces (p)ppGpp under nutrient deprivation condition.

(2) The importance of the stringent response in stationary-phase survival in H.pylori.

(3) The H.pylori ¥ÄspoT mutant transforms to the coccoid transition prematurely.

(4) The stringent response is required for H.pylori survival in aerobic and acidic stress.

4. Conclusion

5. Reference

º»¹®/³»¿ë

1. Abstract

- À§Àå pathogenÀÎ Helicobacter pylori´Â ¾ÆÁÖ ÀûÀº ¼öÀÇ transcriptional regulator¸¸À» »ç¿ëÇÏ¿© Àΰ£ÀÇ À§Àå°ú °°Àº ±ØÇÑ È¯°æ¿¡¼­ ÀûÀÀÀ» ÇØ¾ß ÇÑ´Ù. ÀÌ ÀûÀÀ¿¡´Â stringent response¶ó´Â Àü·«ÀÌ »ç¿ëµÇ´Âµ¥, ÀÌ°ÍÀº (p)ppGpp¶ó´Â alamoneÀ» ÅëÇÏ¿© H.pylori°¡ ÀÚ½ÅÀÇ RNAÇÕ¼ºÀ» ¾ïÁ¦½ÃÅ°¸é¼­ ¿©·¯ ȯ°æ Á¶°Ç¿¡¼­ »ýÁ¸ÇÒ ¼ö ÀÖ´Ù´Â °ÍÀ» º¸¿©ÁØ´Ù. ±×¸®°í (p)ppGppÀÇ »ý»êÀ» ÅëÇÑ transcriptionÀ» Á¶ÀýÇÏ´Â ´É·ÂÀº ´Ù¾çÇÑ pathogenÀÇ infection°ú transmission process¸¦ À§Çؼ­ Áß¿äÇÑ Æ¯¼ºÀ¸·Î »ý°¢ µÈ´Ù. (p)ppGpp synthetase, hydrolaseÀÎ SpoT´Â starvation condition¿¡¼­ (p)ppGppÀÇ »ý»ê¿¡ ¾ÆÁÖ Áß¿äÇÏ´Ù. ÀÌ SpoT°¡ °á¿©µÈ mutantµéÀº stationary-phase¿¡¼­ÀÇ »ýÁ¸ °áÇÌ°ú coccoid ÇüÅ·ÎÀÇ ÀüȯÀÌ wild-typeº¸´Ù ´õ ºü¸£°Ô
Âü°í¹®Çå

5. References
¡Ý Mouery, K., B. A. Rader, E. C. Gaynor, and K. Guillemin. 2006. The stringent response is required for Helicobacter pylori survival of stationary phase, exposure to acid, and aerobic shock. J. Bacteriol. 188:5494-5500.
¡Ý Wells, D. H., and E. C. Gaynor. 2006. Helicobacter pylori initiates the stringent response upon nutrient and pH downshift. J. Bacteriol. 188:3726-3729.
¡Ý Cashel, M., D. R. Gentry, V. J. Hernandez, and D. Vinella. 1996. The stringent response, p. 1458-1496. In F. C. Neidhardt, R. Curtiss ¥², J. L. Ingraham, E. C. C. Lin, K. B. Low, B. Magasanik, W. S. Reznikoff, M. Riley, M. Schaechter, and H. E. Umbarger (ed.), Escherichia coli and Salmonella:cellular and molecular biology, 2nd ed. ASM Press, Washington, D. C.
¡Ý Jain, V., M. Kumar, and D. Chatterji. 2006. ppGpp: stringent response and survival. J. Bacteriol. p. 1-10.


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