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Çѱ¹»ýÅÂÇÐȸ / v.22, no.1, 1999³â, pp.39-43
Gram À½¼º ¼¼±ÕÀÎ Serratia marcescens¿¡ ÀÇÇÑ Ä«µå¹Å ÈíÂø ±âÀÛ
( The Cadmium Biosorption Mechanism in Gram Negative Bacteria, Serratia marcescens )
ÀÌÈ£¿ë;¹ÎºÀÈñ;ÃÖ¿µ±æ; »óÁö´ëÇб³ »ý¸í°úÇаú;´ë±¸´ëÇб³ »ý¹°Çаú;ÇѾç´ëÇб³ »ý¹°Çаú;
 
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Á߱ݼӿ¡ ´ëÇÑ ³»¼ºÀ» ³ªÅ¸³½ Serratia marcescens¸¦ ÀÌ¿ëÇÏ¿© Ä«µå¹Å ÈíÂø ±âÀÛ¿¡ °üÇÏ¿© Á¶»çÇÏ¿´´Ù. ¸ÕÀú Ä«µå¹Å¿¡ ´ëÇÏ¿© ¹Î°¨¼ºÀ» ³ªÅ¸³»´Â µ¹¿¬º¯ÀÌ ±ÕÁÖÀÎ PMÀ» °³¹ßÇÏ¿´À¸¸ç PM±ÕÁÖ´Â 50ppm ÀÌ»óÀÇ Ä«µå¹Å ³óµµ¿¡¼­ ¼ºÀåÇÏÁö ¸øÇÏ¿´´Ù. Ä«µå¹ÅÀ» 50ppm ó¸®ÇÑ ±ÕÁÖ¿¡¼­ 10ȸ ÀÌ»ó °è´ë ¹è¾çÇÏ¿© Ä«µå¹Å¿¡ ÀûÀÀÀ» À¯µµÇÑ PA±ÕÁÖ´Â PC, PM±ÕÁÖ¿¡ ºñÇØ ¼ºÀå ¼Óµµ°¡ Áõ°¡ÇÏ¿´À¸¸ç ¼¼Æ÷ ³» Ä«µå¹Å ÃàÀû·®µµ 4¡­5¹è Áõ°¡ÇÏ¿´´Ù. PA±ÕÁÖ´Â 100 ppm Ä«µå¹Å 󸮱º¿¡¼­ 󸮷® Áß 23%¸¦ ¼¼Æ÷³»¿¡ ÃàÀûÇÏ¿´À¸¸ç ¼¼Æ÷¸· ºÎÀ§º¸´Ù ¼¼Æ÷Áú ºÎÀ§¿¡ ´õ¿í ¸¹Àº Ä«µå¹ÅÀ» ÃàÀûÇÏ¿´´Ù. Ä«µå¹Å 󸮽Ã, Àü ¼¼Æ÷ ´Ü¹éÁú ¾ç»ó¿¡¼­ 28 KDa°ú 64 KDaÀÇ 2°³ÀÇ À¯µµ ´Ü¹éÁú°ú 45 KDaÀÇ °¨¼Ò À¯µµ ´Ü¹éÁúÀ» È®ÀÎÇÏ¿´À¸¸ç ¿øÀÚ Èí±¤ ºÐ¼®À» ÅëÇÏ¿© °¢°¢ÀÇ À¯µµ ´Ü¹éÁú¿¡ °áÇÕµÈ Ä«µå¹Å ¾çÀº ´Ü¹éÁú 1 g´ç 318.25 §¶, 325.37 §¶ÀÌ °ËÃâµÇ¾ú´Ù. ¼¼Æ÷³»¿¡ ÃàÀûµÈ Ä«µå¹ÅÀ» ÀüÀÚÇö¹Ì°æÀ» ÀÌ¿ëÇÏ¿© Ä«µå¹Å °áÇÕ ¹°ÁúÀ» È®ÀÎÇÑ °á°ú, ¼¼Æ÷ÁúÀÇ ´Ü¹éÁú ºÐȹ¿¡¼­ 28 KDaÅ©±âÀÇ À¯µµ ´Ü¹éÁúÀÌ Ä«µå¹Å°ú ÈíÂøÇÑ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. Ä«µå¹Å ÈíÂø¿¡ ´ëÇÑ DNAÁ¶»ç °á°ú 20 Kb Å©±âÀÇ plasmid°¡ Á¸ÀçÇÏ¿´À¸¸ç, curing agent·Î plasmid¸¦ Á¦°ÅÇÑ °á°ú Ä«µå¹Å ³»¼ºÀ» »ó½ÇÇÏ¿© º» ºÐ¸® ±ÕÁÖÀÇ Ä«µå¹Å ³»¼º À¯ÀüÀÚ´Â plasmid»ó¿¡ À§Ä¡ÇÏ´Â °ÍÀ¸·Î È®ÀÎÇÏ¿´´Ù.
Serratia marcescens, an enterobacterium of gram-negative bacteria, is characterized by resistance of the admium. Cadmium sensitive PM strain did not grow in the medium at cadmium concentration of 50 ppm. PA strain was induced to accommodate to cadmium by cultivating the mother strain (PC strain) in the medium with 50 ppm cadmium. As compared with PC and PM strains, PA strain revealed the excellent growth in cadmium media and accumulated four to five times higher cadmium concentration in cell than other strains. PA strain accumulated 23% of cadmium in cells when cultured in medium treated with 100 ppm cadmium and this cadmium was more accumulated in cytosol fractions than membrane fractions. Analysis by TEM indicated that cadmium was concentrated as a form of granule in cytosol. In protein patterns of cell after the treatment of cadmium, two inducible proteins (28 KDa and 64 KDa) and one reducible protein (45 KDa) were detected by SDS-PAGE. By Atomic Absorption Spectrophotometer, the amounts of cadmium attached to inducible proteins of 28 KDa and 64 KDa were 318.28 §¶ and 325.37 §¶ per gram of protein, respectively. It is assumed that these inducible proteins play an important role in the mechanism of cadmium accumulation in cells. A plasmid of 23Kbp was found in S. marcescens. The ability of resistance to cadmium in plasmid was confirmed by curing experiments.
 
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»ý¹°ÇÐÀû Ä«µå¹Å ÈíÂø;À¯µµ´Ü¹éÁú;Ä«µå¹Å ÃàÀû;Serratia marcescens;Cadmium accumulation;Cadmium biosorption;Inducible proteins;S. marcescens.;
 
The Korean Journal of Ecology / v.22, no.1, 1999³â, pp.39-43
Çѱ¹»ýÅÂÇÐȸ
ISSN : 1225-0317
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199911922412791)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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