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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.33, no.4, 2000³â, pp.380-386
Á¶·ù¿¡ ÀÇÇÑ À¯±âÀλ꿰ºÐÇØÈ¿¼ÒÀÇ Kinetic Parameters¿¡ °üÇÑ ¿¬±¸
( A Study on the Kinetic Parameters of Alkaline Phosphatase by Algae )
±è¹üö;ÃÖ±¤¼ø; °­¿ø´ëÇб³ ÀÚ¿¬°úÇдëÇРȯ°æÇаú;°­¿ø´ëÇб³ ÀÚ¿¬°úÇдëÇРȯ°æÇаú;
 
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¼ø¼ö¹è¾çÇÑ Á¶·ù¿Í ÀÚ¿¬±ºÁýÀÇ ½Ä¹°ÇöûũſÀ» ´ë»óÀ¸·Î À¯±âÀÎ»ï¿°ÇØºÐÇØÈ¿¼ÒÀÇ kinectic parameter¸¦ ºñ±³ÇÏ¿´°í, ¿ëÁ¸¹«±âÀÎÀÇ ³óµµ¿Í °¢ parameter¿ÍÀÇ °ü°è¸¦ ¾Ë¾Æº¸¾Ò´Ù. ±âÁú°úÀÇ Ä£È­·ÂÀ» ³ªÅ¸³»´Â AP$_{ase}$ÀÇ K$_{m}$Àº Á¶·ùÀÇ Á¾¸¶´Ù ¸Å¿ì »óÀÌÇÑ °ªÀ» º¸¿´´Ù. Chlorella sp.¸¦ Á¦¿ÜÇÑ ³ìÁ¶·ù°¡ ´Ù¸¥ Á¾¿¡ ºñÇØ Å« K$_{m}$À» º¸¿´°í, ±ÔÁ¶·ù¿Í Chlorella sp.¿¡¼­ ÀÛÀº K$_{m}$À» º¸¿´´Ù. ¼ø¼ö¹è¾çÇÑ ³²Á¶·ù Anabaena flos-aquae¿¡¼­ extracelluar free enzyme ÀÇ K$_{m}$ÀÌ cell-bound enzymeÀÇ K$_{m}$º¸´Ù ÀÛ¾Ò´Ù. ÀÚ¿¬±ºÁýÀÎ ¼Ò¾çÈ£¿¡¼­´Â ³²Á¶·ù Anabaena sp. °¡ ¿ìÁ¡ÇÏ¿´´ø ¿©¸§ÀÇ ½Ä¹°ÇöûũſÀÇ K$_{m}$ÀÌ ±ÔÁ¶·ù°¡ ¿ìÁ¡ÇÏ¿´´ø º½ÀÇ ±ºÁýº¸´Ù ÄÇ´Ù. AP$_{ase}$ Ȱ¼ºµµÀÇ V$_{max}$´Â ¼öÁßÀÇ DIP ³óµµº¸´Ù´Â ½Ä¹°ÇöûũſÀÇ ¼¼Æ÷³» ÀÎÀÇ ÇÔ·®¿¡ Á÷Á¢ÀûÀÎ ¿µÇâÀ» ¹Þ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¼Ò¾çÈ£¿¡¼­ °¡À»ºÎÅÍ º½±îÁö extracelluar free enzymeÀÇ È°¼ºµµ°¡ ÃÑ AP$_{ase}$ Ȱ¼ºµµÀÇ 36${sim}$97%ÀÇ ±â¿©¸¦ ÇÏ¿´´Âµ¥, ÀÌ´Â ÀÌ ½Ã±â¿¡ extracelluar free enzymeÀÌ È£¼öÀÇ ÀμøÈ¯¿¡¼­ ¸Å¿ì Áß¿äÇÑ ¿äÀÎÀ¸·Î ÀÛ¿ëÇÑ´Ù´Â °ÍÀ» ½Ã»çÇÑ´Ù. ±×¸®°í extracelluar free enzyme°ú ÃÑ AP$_{ase}$ÀÇ K$_{m}$ÀÌ °ÅÀÇ ºñ½ÁÇÏ¿´´Âµ¥, ÀÌ´Â extracelluar free enzymeÀÌ Á¶·ù·ÎºÎÅÍ ±âÀεǾú±â ¶§¹®À¸·Î »ç·áµÈ´Ù.
Alkaline phosphatase ($AP_{ase}$) activity was studied for the pure cultures and natural communities of phytoplankton. The Michaelis-Menten constant ($K_m$) showed large variation with species. Some green algae showed large $K_m$ ($650;{mu}M$ for Selenastrum capriconutum). Chlorella sp. and Nitzschia palea showed smaller Km (respectively1.7, 2.0 HM) than those of other species examined. The extracellular free enzyme in the filtrate of Anabaena flos-aquae showed smaller Km ($52;{mu}M$) than that of cellbound form ($276;{mu}M$). The $K_m$ ($12.0;{mu}M$) of summer phytoplankton in Lake Soyang. when Anabaena sp. was dominant species, was larger than that (1.5 HM) of spring phytoplankton when Asterionella sp. was the dominant. Although maximum activity($V_{max}$) in Lake Soyang was affected by the concentration of DIP within the lake, but the $V_{max}$ always varied not with the DIP concentration of the lake. Induction of $AP_{ase}$ may be more affected by the phosphate content within the cell of phytoplankton than by the concentration of DIP within the lake, The extracellular free $AP_{ase}$ activity accounted for $36{sim}97%$ of total activity from fall to spring turnover in Lake Soyang. The $K_m$ ($1.1{mu}3.5;M$) of extracelluar free enzyme were simillar to those ($0.7{mu}3.5;M$) of the total activity. This indicates that the extracelluar free enzyme was derived from phytoplankton.
 
Ű¿öµå
Alkaline phosphatase;Phytoplankton;Kinetics;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.33, no.4, 2000³â, pp.380-386
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200018317176460)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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