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Role of nitric oxide and flavohemoglobin homologous genes in Aspergillus nidulan

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CEFP °ü¸®ÀÚ (mewin007@snu.ac.kr)

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2012-01-31 15:21:08

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Baidya S, Cary JW, Grayburn WS, and Calvo AM. (2011) Role of nitric oxide and flavohemoglobin homologous genes in Aspergillus nidulans sexual development and mycotoxin production. Applied Environmental Microbiology doi:10.1128/AEM.00638-11


: Nitric oxide(NO)´Â ½ÅÈ£Àü´Þ¹°Áú·Î ¸Å¿ì Áß¿äÇÏ´Ù°í ¾Ë·ÁÁ® ÀÖÀ¸¸ç, ¶ÇÇÑ nitrosactive stress¸¦ ¾ß±âÇϴµ¥ ¿øÇÙ»ý¹°¿¡¼­ºÎÅÍ ÁøÇÙ»ý¹°±îÁö Àß º¸Á¸µÈ flavohemoglobins(FHbs)Àº NO levelÀ» ÀúÇϽÃÅ°´Âµ¥ °ü¿©ÇÑ´Ù°í ¾Ë·ÁÁ® ÀÖ´Ù. FHbs´Â hemeÀ» Æ÷ÇÔÇÏ´Â hemoglobin-like domain°ú FAD ¹× NAD(P)H°¡ °áÇÕÇÏ´Â ºÎÀ§¸¦ Æ÷ÇÔÇÏ´Â reductase domainÀ» °¡Áö°í ÀÖÀ¸¸ç, dioxygenationÀ» ÅëÇÏ¿© »ê¼Ò Á¸Àç ÇÏ¿¡ NO¸¦ µ¶¼ºÀÌ ¾ø´Â nitrate ÀÌ¿ÂÀ¸·Î º¯È­½ÃŲ´Ù. º» ³í¹®Àº Aspergillus nidulans¿¡¼­ NO°¡ ÇüŹ߻ý °úÁ¤°ú ÀÌÂ÷´ë»ç¿¡ ¿µÇâÀ» Áشٴ °á°ú¸¦ óÀ½À¸·Î ¹ßÇ¥ÇÏ¿´´Ù. Áï A. nidulans flavohemoglobin À¯ÀüÀÚ fhbA¸¦ °á¼Õ½ÃŲ º¯ÀÌü¿¡¼­ À¯¼ººÐÈ­°¡ À¯µµµÇ°í sterigmatocystin »ý¼ºÀÌ ÀúÇϵÊÀ» º¸°íÇÏ¿´´Ù. ¶ÇÇÑ NO¸¦ ¹ß»ýÇÏ´Â compound¸¦ ±ÕÁÖ¿¡ Á¦°øÇÏ¿´À» ½Ã cleistotheciaÀÇ Áõ°¡¿Í À¯¼ººÐÈ­¿¡ ÇʼöÀûÀÎ nsdD ¹× steAÀÇ ¹ßÇöÀÌ Áõ°¡µÊÀ» ¹àÇû´Ù.

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