|
|
|
Çѱ¹È¯°æ»ý¹°ÇÐȸ / v.19, no.3, 2001³â, pp.211-217
|
Salicylate°¡ ´ã¹è ¹ÌºÐȼ¼Æ÷ isoperoxidase $A_3$ÀÇ È°¼º¿¡ ¹ÌÄ¡´Â ¿µÇâ
( Effects of Salicylate on the Activity of Isoperoxidase $A_3$ from Tobacco Callus ) |
| À̹̿µ; ¼øÃµÇâ´ëÇб³ »ý¸í°úÇкÎ;
|
|
|
 |
|
| |
| ÃÊ ·Ï |
| ½Ä¹°ÀÇ ÀúÇ×¼º°ú ¹æ¾î°ü·Ã¹°Áú À¯µµ¿¡ °ü·ÃµÈ salicylate°¡ ´ã¹è ¹ÌºÐȼ¼Æ÷·ÎºÎÅÍ ºÐ¸®µÈ isoperoxidase $A_3$ÀÇ È°¼º¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» »ìÆìº¸°í, $Fe^{2+}$ ÀÇ Ã·°¡¿¡ ÀÇÇÏ¿© salicylate¿¡ ÀÇÇÑ È¿¼ÒȰ¼º ¾ïÁ¦°¡ º¸È£µÇ´Â ¾ç»óÀ» Á¶»çÇÏ¿´´Ù. ´Ù¾çÇÑ ³óµµÀÇ salicylate°¡ isoperoxidase $A_3$ÀÇ È°¼º¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Á¶»çÇÑ °á°ú 0.48mM salicylate¿¡ ÀÇÇÏ¿© isoperoxidase $A_3$ÀÇ È°¼ºÀÌ ¾à 20% °¨¼ÒµÇ¾ú°í, 0.6mM salicylate¿¡ ÀÇÇÏ¿© È¿¼ÒȰ¼ºÀÌ 85% ÀÌ»ó °¨¼ÒµÇ¾ú´Ù. ÀÌ·¯ÇÑ °á°ú´Â salicylate¿¡ ÀÇÇÏ¿© isoperoxiase $A_3$°¡ ¾ïÁ¦µÊÀ» º¸¿©ÁØ´Ù. Salicylate¿¡ ÀÇÇÑ isoperoxidase $A_3$ÀÇ ¾ïÁ¦¹ÝÀÀÀº pH ÀÇÁ¸ÀûÀ¸·Î ÀϾÀ» »Ó¸¸ ¾Æ´Ï¶ó, noncompetitive inhibition ¾ç»óÀ» ³ªÅ¸³Â´Ù. »Ó¸¸ ¾Æ´Ï¶ó salicylate¿¡ ÀÇÇÑ isoperoxidase $A_3$ÀÇ È°¼º¾ïÁ¦´Â $Fe^{2+}$ ÷°¡¿¡ ÀÇÇÏ¿© °ÅÀÇ ¿Ïº®ÇÏ°Ô º¸È£µÇ¾ú´Ù. Isoeroxidase A3·ÎºÎÅÍ hemeºÎºÐÀ» Á¦°ÅÇÏ¿© apoperoxidase¸¦ Á¦Á¶ÇÑ ÈÄ ¿©·¯°¡Áö ±Ý¼ÓÀÌ¿ÂÀÌ apoperoxidaseÀÇ È°¼ºÈ¸º¹¿¡ ¹ÌÄ¡´Â È¿°ú¸¦ Á¶»çÇÏ¿´´Ù. ±× °á°ú hemin°ú $Fe^{2+}$ ÷°¡¿¡ ÀÇÇÏ¿© apoperoxidaseÀÇ È°¼ºÀÌ 80% ÀÌ»ó ȸº¹µÇ¾úÀ¸³ª $Cu^{2+},;Zn^{2+},;Co^{2+},;Mn^{2+}$ µîÀº apoperoxidaseÀÇ È°¼ºÀ» À籸¼º½ÃŰÁö ¸øÇÏ¿´´Ù. |
|
| Salicylate is involved in the induction of pathogen-related proteins and plant defense response. The effects of salicylate on the activity isoperoxidase $A_3$ from tobacco callus (Nicotiana tabacum L.) and the protection against the enzyme inactivation by salicylate in the presence of $Fe^{2+}$ were examined. About 20% and 85% activity losses of peroxidase occurred at 0.48 mM and 0.6 mM salicylate, respectively, showing that isoperoxidase $A_3$ was inactivated by salicylate. The inactivation occurred depending on pH and showed noncompetitive inhibition mode. Moreover, inactivation of the enzyme by salicylate was completely protected in the presence of $Fe^{2+}$. Apoperoxidase without heme moiety was constructed and the effects of various metal ions on the recovery of enzyme activities were investigated. More than 80% of the activity was reconstituted by the addition of $Fe^{2+}$ or hemin. However, the enzyme activity was not recovered by $Cu^{2+},;Zn^{2+},;Co^{2+},;or;Mn^{2+}$. |
| |
| Ű¿öµå |
| Salicylate;tobacco callus;isoperoxidase $A_3$; |
| |
|
|
 |
|
ȯ°æ»ý¹° / v.19, no.3, 2001³â, pp.211-217
Çѱ¹È¯°æ»ý¹°ÇÐȸ
ISSN : 1226-9999
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200111921492382)
¾ð¾î : Çѱ¹¾î |
|
| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
|
|
|
|
|
|