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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.38, no.4, 2005³â, pp.510-517
³²Á¶·ùÀÇ ÀÌÇü¼¼Æ÷ Á¶Àý À¯ÀüÀÚ¿Í Áú¼Ò·®¿¡ µû¸¥ À¯ÀüÀÚ ¹ßÇöÀÇ ºÐ¼®
( Analysis of a Heterocyst-controlling Gene and Its Expression upon Nitrogen Starvation in a Cyanobacterium )
¹èÁ¤Áø;À±È£¼º; °æºÏ´ëÇб³ ÀÚ¿¬°úÇдëÇÐ »ý¹°Çаú;°æºÏ´ëÇб³ ÀÚ¿¬°úÇдëÇÐ »ý¹°Çаú;
 
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¼±ÇüÀÇ ³²Á¶·ù ¾Æ³ªº£³ª´Â ±¤ÇÕ¼º°ú Áú¼Ò°íÁ¤ ´ÉÀÌ ÀÖÀ¸¸ç, ÀÌ´Â ¾Æ¸¶µµ ÀÌ ³²Á¶·ù°¡ °¢Á¾ À°¼ö ȯ°æ¿¡ Àß ÀûÀÀÇϴµ¥ Å« ¿ªÇÒÀ» Çß´Ù°í º¼ ¼ö ÀÖ´Ù. ÀÛÀº patS¶ó´Â À¯ÀüÀÚ´Â Áú¼Ò °íÁ¤¼¼Æ÷ÀÇ Çü¼ºÀ» ¸·À¸¸ç °á°úÀûÀ¸·Î Áú¼Ò¿øÀÌ ºÎÁ·ÇÑ È¯°æ¿¡¼­ ¾Æ³ªº£³ªÀÇ Á×À½À» °¡Á®¿Â´Ù. º» ¿¬±¸´Â patS À¯ÀüÀÚ ÁÖº¯ÀÇ DNA ¿°±â ¼­¿­À» ºÐ¼®ÇÏ¿© codon Ȱ¿ëµµ¸¦ ¾Ë¾Æ º» °á°ú patS¸¦ Á¦¿ÜÇÑ ´Ù¸¥ À¯ÀüÀÚ°¡ Á¸ÀçÇÏÁö ¾ÊÀ½À» ¹àÇû´Ù. patS¸¦ Æ÷ÇÔÇÏ´Â ¼¼ °³ÀÇ °ãÄ¡´Â cosmid¸¦ ã¾Æ¼­ ±âÁ¸ÀÇ ¾Ë·ÁÁø ÀÌÇü¼¼Æ÷ ¹ß´Þ À¯ÀüÀÚ¸¦ Ž»öÇÏ¿´À¸³ª ³ªÅ¸³ªÁö ¾Ê¾Ò´Ù. Áú¼Ò¿øÀÇ °áÇÌ¿¡ ¹ÝÀÀÇÏ´Â patS À¯ÀüÀÚÀÇ ¹ßÇöÀ» Northern blot ºÐ¼®°ú lacZ reporter À¯ÀüÀÚ ÇÕ¼º ½ÇÇèÀ» ÅëÇÏ¿© °¢°¢ Àü»ç¿Í ¹ø¿ªÀÇ ´Ü°è¿¡¼­ ¾Ë¾Æº¸¾Ò´Ù. patS À¯ÀüÀÚÀÇ ¹ßÇöÀº ¹èÁö·ÎºÎÅÍ Áú¼Ò¿øÀÌ Á¦°ÅµÈ ÈÄ 12½Ã°£ ³»¿¡ ±Þ°ÝÈ÷ Áõ°¡ÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù.
The filamentous cyanobacterium Anabaena is capable of both photosynthesis and nitrogen fixation which probably facilitated its incredible adaptation and proliferation in freshwater environments. A small gene, patS, was found to block nitrogen fixing cells from developing which resulted in death of Anabaena in the absence of combined nitrogen sources. We analyzed the DNA sequences in the vicinity of the patS gene by using a codon usage program and detected no codon bias other than the patS open reading frame. Three overlapping cosmids that contain the patS gene were identified, and the presence of other known heterocyst-controlling genes was examined. The patS expression in response to nitrogen starvation was analyzed at the level of transcription and translation by using Northern blot analyses and lacZ-reporter-gene fusion experiments, respectively. The patS expression increased rapidly (within 12 hours) upon the removal of combined nitrogen from the media.
 
Ű¿öµå
heterocyst-controlling gene;expression pattern;nitrogen concentration;Anabaena;cyanobacteria;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.38, no.4, 2005³â, pp.510-517
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200518317185636)
¾ð¾î : ¿µ¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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