9mht: Difference between revisions

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[[Image:9mht.~~gif~~|left|200px]]

[[Image:9mht.png|left|200px]]

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~~'''~~CYTOSINE-SPECIFIC METHYLTRANSFERASE HHAI/DNA COMPLEX~~'''~~

===CYTOSINE-SPECIFIC METHYLTRANSFERASE HHAI/DNA COMPLEX===

~~==Overview==~~

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~~Three structures have been determined for complexes between HhaI methyltransferase (M.HhaI) and oligonucleotides containing a G:A~~, ~~G:U or G:AP (AP = abasic or apurinic/apyrimidinic) mismatch at the target base pair. The mismatched adenine~~, ~~uracil and abasic site are all flipped out of~~ the ~~DNA helix and located in~~ the ~~enzyme's active-site pocket, adopting the same conformation~~ as ~~in the flipped-out normal substrate~~. ~~These results, particularly the flipped-out abasic deoxyribose sugar, provide insight into the mechanism of base flipping~~. ~~If the process involves the protein pushing the base out of the helix, then the push must take place not on the base~~, ~~but rather on the sugar-phosphate backbone. Thus rotation of the DNA backbone~~ is ~~probably~~ the ~~key to base flipping~~.

The line below this paragraph, {{ABSTRACT_PUBMED_9783745}}, adds the Publication Abstract to the page

(as it appears on PubMed at http://www.pubmed.gov), where 9783745 is the PubMed ID number.

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==About this Structure==

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[[Category: Restriction system]]

[[Category: Transferase]]

''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on ~~Sun May 4 22~~:54:49 2008''

''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri Jul 11 12:50:52 2008''

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-[[Image:9mht.gif|left|200px]]
+{{Seed}}
+[[Image:9mht.png|left|200px]]
 <!--
@@ Line 9: / Line 10: @@
 {{STRUCTURE_9mht|  PDB=9mht  |  SCENE=  }}
-'''CYTOSINE-SPECIFIC METHYLTRANSFERASE HHAI/DNA COMPLEX'''
+===CYTOSINE-SPECIFIC METHYLTRANSFERASE HHAI/DNA COMPLEX===
-==Overview==
+<!--
-Three structures have been determined for complexes between HhaI methyltransferase (M.HhaI) and oligonucleotides containing a G:A, G:U or G:AP (AP = abasic or apurinic/apyrimidinic) mismatch at the target base pair. The mismatched adenine, uracil and abasic site are all flipped out of the DNA helix and located in the enzyme's active-site pocket, adopting the same conformation as in the flipped-out normal substrate. These results, particularly the flipped-out abasic deoxyribose sugar, provide insight into the mechanism of base flipping. If the process involves the protein pushing the base out of the helix, then the push must take place not on the base, but rather on the sugar-phosphate backbone. Thus rotation of the DNA backbone is probably the key to base flipping.
+The line below this paragraph, {{ABSTRACT_PUBMED_9783745}}, adds the Publication Abstract to the page
+(as it appears on PubMed at http://www.pubmed.gov), where 9783745 is the PubMed ID number.
+-->
+{{ABSTRACT_PUBMED_9783745}}
 ==About this Structure==
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 [[Category: Restriction system]]
 [[Category: Transferase]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May  4 22:54:49 2008''
+''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri Jul 11 12:50:52 2008''