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Streptococcus mutans GS-5 GlucosyltransferaseÀÇ Å¬·Î´×°ú ¹ßÇö

Cloning and expression of Streptococcus mutans GS-5 glucosyltransferase

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±èÀç°ï ( Kim Jae-Gon ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
¹éº´ÁÖ ( Baik Byeong-Ju ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
¾ç¿¬¹Ì ( Yang Yeon-Mi ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
¹ÚÁ¤·Ä ( Park Jeong-Yeol ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
ÀÌ°æ¿­ ( Lee Gyoung-Yeol ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç

Abstract

Ä¡¾Æ¿ì½ÄÀº ÁÖ·Î mutans streptococci¿¡ ÀÇÇØ ¾ß±âµÇ´Â °¨¿°¼º ÁúȯÀ¸·Î¼­ ÁÖ ¿øÀαտ¡´Â streptococcus mutans°¡ ÀÖ´Ù. S. mutans°¡ Ä¡¾Æ¿ì½ÄÀ» À¯¹ßÇÏ´Â ºÐÀÚ »ý¹°ÇÐÀû ±âÀüÀº ¸î °¡Áö ´Ü°è¸¦ Æ÷ÇÔÇÑ´Ù. ¸ÕÀú S. mutans´Â AgI/II¿Í °°Àº ¼¼Æ÷ Ç¥¸éÀÇ ¼¶À¯¼º ´Ü¹éÁúÀ» ¸Å°³·Î Ä¡¸éÀÇ Å¸¾×¼º ÇǸ·¿¡ ÀÏÂ÷ÀûÀ¸·Î ºÎÂøÇÑ´Ù. µÎ¹ø° ´Ü°è¿¡¼­ ÀÚ´çÀÇ Á¸ÀçÇÏ¿¡ glucosyltransferase(GTF)´Â glucan°ú °°Àº ´Ù´çü¸¦ ÇÕ¼ºÇÏ°Ô µÈ´Ù. ¸¶Áö¸·À¸·Î ÀÌ·¸°Ô ÇÕ¼ºµÈ glucanÀº glucan binding proteins¿Í »óÈ£ÀÛ¿ëÇÏ¿© Ä¡¸é¼¼±Õ¸·À» Çü¼ºÇؼ­ ¼¼±ÕÀÇ ±ºÁýÈ­¸¦ °¡´ÉÇÏ°Ô ÇÑ´Ù. ¸¹Àº ½ÇÇè°ú Àӻ󿬱¸¿¡¼­ S. mutansÀÇ ÁÖ¿ä Ç׿ø(Ag I/II, GTFs, GBPs)µéÀÌ Ä¡¾Æ¿ì½Ä º´¸®±âÀü¿¡ ¿µÇâÀ» ÁØ´Ù°í ¾Ë·ÁÁ® ¿Ô°í, µû¶ó¼­ ÀÌ·± Ç׿øµéÀÌ ¸é¿ª°è¿¡ ÀÛ¿ëÇÏ¿© Ä¡¾Æ¿ì½ÄÀ» ¸·´Â ¹é½ÅÀ¸·Î ÀÌ¿ë °¡´ÉÇÏ´Ù. º» ½ÇÇèÀº streptococcus mutans GS-5·ÎºÎÅÍ, GTFb, GTFc, GTFd À¯ÀüÀÚ¸¦ º¹Á¦ÇÏ°í ¿°±â¼­¿­ºÐ¼®À» ÇÏ¿´À¸¸ç, ÀÌÁß GTFd°¡ ¸ÕÀú ÀçÁ¶ÇÕ ´Ü¹éÁú »ý»êÀ» À§ÇØ ¹ßÇö º¤ÅÍ¿¡ Ŭ·Î´× µÇ¾úÀ¸¸ç, À̷κÎÅÍ ´Ü¹éÁúÀÌ ¹ßÇöµÊÀ» È®ÀÎÇÏ¿´´Ù. À̹ø ½ÇÇè¿¡¼­ ¾òÀº ¼ø¼ö GTF Ç׿øÀº µ¿¹°½ÇÇèÀ» ÅëÇØ Æ¯Á¤ GTF È°¼ººÎÀ§¿¡ ´ëÇÑ Ç×ü »ý»ê¿¡ ÀÌ¿ëµÉ ¼ö ÀÖÀ» °ÍÀÌ´Ù.

Dental caries is an infectious disease caused by mutans streptococci, and is a primary etiologic agent of dental caries in humans. The molecular pathogenesis of mutans streptococcal-associated dental caries occurs in three phases. Firstly, S. mutans attaches to tooth surface via a cell surface adhesion termed antigen I/II. In the second phase, the glucosyltransferase(GTFs) synthesize polymers like glucans in the presence of sucrose. In the third phase, the multivalent glucans interacts with glucan binding proteins (GBPs) and they make dental plaque and accumulation of microorganisms. Many studies and clinical trials have indicated that a mucosal immune response to these antigens(Ag I/II, GTFs, GBPs) of S. mutans can influence the pathogenesis of dental caries. So these antigens can be important vaccine candidates for immunologic intervention against dental caries. In this study, we cloned the genes for GTFb, GTFc, GTFd from S. mutans GS-5 and did the nucleotide sequence analysis. And the recombinant proteins of GTFd and N-terminus of GTFd were expressed. Intact GTF which we get from this experiment can be used for antibody production specific for any GTF activity domain through animal experiment.

Å°¿öµå

Streptococcus mutans;Glucosyltransferase; Glucan

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