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Structure and function of type II
restriction endonucleases
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1. THE DIVERSITY OF RESTRICTION ENDONUCLEASES
2. THE SIMILARITY OF RESTRICTION ENDONUCLEASE
STRUCTURES
3. THE INTERACTION OF RESTRICTION
ENDONUCLEASES WITH DNA
4. DNA BINDING AND TARGET SITE LOCATION
5. DNA RECOGNITION
6. COUPLING BETWEEN RECOGNITION AND CATALYSIS
7. THE MECHANISM OF CATALYSIS OF
PHOSPHODIESTER BOND CLEAVAGE BY
RESTRICTION ENDONUCLEASES
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THE DIVERSITY OF RESTRICTION ENDONUCLEASES
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Restriction endonuclease´Â ¹«¾ùÀΰ¡?
1. ƯÀÌÀûÀ¸·Î restriction endonuclease ÀÎ½Ä ºÎÀ§¿¡ ±ÙÁ¢ÇÑ °÷À̳ª ³»ºÎ¸¦ Àý´ÜÇÏ´Â °Í
2. nucleolytic activity¸¦ À§ÇØ ATP °¡¼öºÐÇظ¦ ÇÊ¿ä·Î ÇÏÁö ¾Ê´Â´Ù´Â °Í
THE DIVERSITY OF RESTRICTION ¡¦(»ý·«)
|
-Ÿ°Ù ºÎÀ§ÀÇ À§Ä¡¸¦ °¡¼ÓȽÃÅ´
DNA BINDING AND TARGET SITE LOCATION
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One Binding¿¡¼ ¾à 106bp ½ºÄµ °¡´É
È¿°úÀûÀ¸·Î Sliding °Å¸® ´ÜÃà
Mg2+ À̿ ȯ°æÀº È¿°úÀû ½½¶óÀ̵ù °Å¸®¿¡ ¿µÇâ¹Ìħ
DNA ³» È¿¼Ò ±â´É ºü¸¥ ¼Óµµ¸¦ ÇÊ¿ä·Î Çϴµ¥,
Linear DifussionÀÌ À̸¦ ÃæÁ·
(Sliding, Hopping, Intersegment transferµµ Æ÷ÇÔ)
DNA BINDING AND TARGET SITE LOCATION
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DNA RECOGNITION
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Á¦ÇÑÈ¿¼Ò°¡ Target DNA Linear Diffusion ÇÏ´Â µ¿¾È ÀÎ½Ä À§ÇØ Áö¼ÓÀûÀ¸·Î Major groove¿Í minor groove¸¦ Á¶»çÇÏ´Â Çö»ó
-EcoRI family-sticky ends
-EcoRV family-blunt ends
DNA RECOGNITION
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EcoRI family-sticky ends
- EcoRI
- MunI
- BglII
- BsoBI
- NgoMIV
DNA RECOGNITION
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DNA RECOGNITION
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EcoRV family-blunt ends
- EcoRV
- BglI
DNA RECOGNITION
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EcoRV
BglI
DNA RECOGNITION
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Recognition°ú Catalysis »çÀÌÀÇ Coupling
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Restriction Endonuclease¿¡ ÀÇÇØ DNA
BindingÀº °ÇÏ°í Áß¿äÇÏ°Ô ¿ì¼±ÀûÀ¸·Î
recognition site¿¡ binding
2°¡ÀÇ ±Ý¼Ó ÀÌ¿Â cofactorsÀÇ Á¸Àç¿©ºÎµµ Áß¿ä
Intrasubunit »Ó¸¸ ¾Æ´Ï¶ó inters