Àá½Ã¸¸ ±â´Ù·Á ÁÖ¼¼¿ä. ·ÎµùÁßÀÔ´Ï´Ù.

Helicobacter pylori·ÎºÎÅÍ ºÐ¸®ÇÑ ¸¶ÀÌÅ©·Î¼Ò¿ÈÀÇ ATPase È°¼º ATPase Activity of Microsomes Prepared from Helicobacter pylori

´ëÇѼÒÈ­±âÇÐȸÁö 2000³â 36±Ç 6È£ p.728 ~ 735
¼Ò¼Ó »ó¼¼Á¤º¸
È«¿ø¼±/Won Sun Hong Á¤ÈÆ¿ë/¾ç¼®±Õ/¸í½ÂÀç/±èÁøÈ£/¹Î¿µÀÏ/Á¶ÇüÁø/»ç°øÁ¤/¹Ú½ÂÇÊ/±èÇý¿ø/Hoon Yong Jung/Suk Gyun Yang/Seung Jae Myung/Jin Ho Kim/Young Il Min/Hyung Jin Jo/Gong Jung Sa/Seung Pil Park/Hye Won Kim

Abstract

¸ñÀû : Helicobacter pylori (H. pylori)°¡ ³·Àº pH
¿¡¼­ »ýÁ¸ÇÒ ¼ö ÀÖ´Â ÁÖ ±âÀüÀº ¿ä¼ÒºÐÇØÈ¿¼Ò
(urease)¸¦ °®°í Àֱ⠶§¹®Àε¥,ÃÖ±Ù ATPase (pro-ton
pump)µµ Á¸ÀçÇÏ´Â °ÍÀÌ º¸°íµÇ¾ú´Ù. º» ¿¬±¸¿¡
¼­´Â H. pylori ¿¡ Á¸ÀçÇÏ´Â ATPase ÀÇ Æ¯¼ºÀ» ¾Ë¾Æº¸
°íÀÚ ÇÏ¿´´Ù. ´ë»ó ¹× ¹æ¹ý : H. pylori (ATCC
43504)·ÎºÎÅÍ ¸·¼Òü°¡ Æ÷ÇÔµÈ ¸¶ÀÌÅ©·Î¼Ò¿È (micro-somes)
À» ºÐ¸®ÇÏ¿©, enzyme-coupled assay ·Î ATPase
È°¼ºÀ» ÃøÁ¤ÇÏ¿´´Ù. F type ATPase ¿¡ ´ëÇÑ Æ¯ÀÌÀû
¾ïÁ¦Á¦ÀÎ sodium azide (NaN3)¿Í N,N-dicyclohexyl-carbodiimide
(DCCD), P type ATPase ¿¡ ´ëÇÑ Æ¯ÀÌ
Àû ¾ïÁ¦Á¦ÀÎ diethylstilbestrol (DES)°ú V type ATPase
¾ïÁ¦Á¦ÀÎ bafilomycin ÀÌ ¸¶ÀÌÅ©·Î¼Ò¿ÈÀÇ ATPase È°
¼º¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ÃøÁ¤ÇÏ¿´´Ù. DES °¡ H. pylori
»ýÁ¸¿¡ ¹ÌÄ¡´Â ¿µÇâ°ú proton ionophore ÀÎ nigericin
ÀÌ ATPase È°¼º¿¡ ¹ÌÄ¡´Â ¿µÇâµµ ÃøÁ¤ÇÏ¿´´Ù. °á
°ú : H. pylori ¸¶ÀÌÅ©·Î¼Ò¿ÈÀÇ ATPase È°¼ºÀ» pH
4-8 ¿¡¼­ ÃøÁ¤ÇÏ¿´´Âµ¥, ATPase È°¼ºÀº pH 5.5 ¿¡¼­
ÃÖ°íÄ¡¸¦ º¸¿´´Ù. pH 7 ¿¡¼­ ÃøÁ¤ÇÑ H. pylori ¸¶ÀÌ
Å©·Î¼Ò¿ÈÀÇ ATPase È°¼ºÄ¡´Â 430 ¡¾34.4 nmol/mi
n ¡¤mg protein À̾ú´Ù. NaN3 10 mM, DCCD 10 mM
°ú DES 100 ¥ìM À» ÷°¡ÇÏ¿´À» ¶§, ATPase È°¼ºÀº
°¢°¢ 29%, 38%¿Í 42%°¡ °¨¼ÒÇÏ¿´´Ù. ÇѸé ba-filomycin
1 ¥ìM À» ÷°¡ÇÑ °æ¿ì¿¡´Â ATPase È°¼ºÀÇ
À¯ÀÇÇÑ º¯È­°¡ ¾ø¾ú´Ù. DES ´Â H. pylori ÀÇ »ýÁ¸À²°ú
ATPase È°¼ºÀ» °¨¼Ò½ÃÄ×´Ù. Nigericin 10 ¥ìM ·Î ó
¸®ÇÑ °æ¿ì ATPase È°¼ºÀº 26%Áõ°¡ÇÏ¿´´Ù. °á·Ð :
H. pylori ¼¼Æ÷¸·¿¡´Â F type °ú P type ATPase °¡ Á¸
ÀçÇϸç, ÀÌ ATPase ´Â H+ ATPase ÀÏ °ÍÀ» ½Ã»çÇÏ¿´
´Ù. ÀÌ °á°ú´Â H. pylori ´Â ¸ö ³»ºÎ·Î ħÅõÇÑ H+À» F
type ATPase °¡ »ý»êÇÑ ATP ¸¦ »ç¿ëÇÏ¿© P type
ATPase ·Î ºü¸£°Ô ¸ö ¹ÛÀ¸·Î ¹èÃâÇÏ¿© »ê¼º ȯ°æ¿¡ ¼­ »ýÁ¸ÇÒ ¼ö ÀÖ´Â °ÍÀ¸·Î »ý°¢µÈ´Ù

Background/Aims: Helicobacter pylori(H. pylori) is unique in its ability to persist in acidic environment. The main mechanisms to survive in low pH are to produce large amounts of urease and to have ATPases. This study was performed to invetigate
the
characteristics of ATPases of H. pylori. Methods: ATPase activity of microsomes prepared from H. pylori (ATCC 43504) was measured by enzyme-coupled assay. The effects of pH, sodium azide (NaN3), N,N-dicyclohexylcarbodiimide (DCCD),
diethylstilbestrol
(DES) and bafilomycin on the microsomal ATPase activities were determined. We also investigated the effect of nigericin on the ATPase activity. Results: The ATPase showed maximum activity at pH 5.5. The activitiy was decreased by 29%, 38% and 42%
with
the addition of NaN3, DCCD and DES, respectively. Bafilomycin had little effect on the ATPase activity. ATPase activity was decreased with the addition of DES dose-dependently, while it was increased by nigericin dose-dependently. Conclusions:
These
results suggest that cell membrane of H. pylori possesses two types of proton pumps, F-type and P-type ATPases, which act as H+ ATPase.

Å°¿öµå

Ç︮ÄÚ¹ÚÅÍ ÆÄÀ̷θ®; ¸¶ÀÌÅ©·Î¼Ò¿È; FÇü ATPase; PÇü ATPase; H+ ATPase; Helicobacter pylori; Microsomes; F type ATPase; P type ATPase; H+ ATPase;

¿ø¹® ¹× ¸µÅ©¾Æ¿ô Á¤º¸

 

µîÀçÀú³Î Á¤º¸

MEDLINE
KCI
KoreaMed
KAMS