We apologize for Proteopedia being slow to respond. For the past two years, a new implementation of Proteopedia has been being built. Soon, it will replace this 18-year old system. All existing content will be moved to the new system at a date that will be announced here.
A-RNA tour
From Proteopedia
(Difference between revisions)
| Line 21: | Line 21: | ||
You can <scene name='72/725869/Zoom_pairs/1'>look at just four of the base pairs.</scene>.You are looking into the major groove and the colors of the base pairs alternate. You can also <scene name='72/725869/Zoom_pairs_only/1'>look at just the bases</scene>. | You can <scene name='72/725869/Zoom_pairs/1'>look at just four of the base pairs.</scene>.You are looking into the major groove and the colors of the base pairs alternate. You can also <scene name='72/725869/Zoom_pairs_only/1'>look at just the bases</scene>. | ||
Each base pair stacks on the next similarly, as shown from <scene name='72/725869/Zoom_pairs_top/1'>this top view</scene>. This is the <scene name='72/725869/Zoom_pairs_only_top/1'>same top view of just the bases</scene>. | Each base pair stacks on the next similarly, as shown from <scene name='72/725869/Zoom_pairs_top/1'>this top view</scene>. This is the <scene name='72/725869/Zoom_pairs_only_top/1'>same top view of just the bases</scene>. | ||
| - | B-DNA stacks similarly, but compare this with Z-DNA, which behaves much differently. Essentially all helical RNA is in A form, but DNA can also be found in A form under certain conditions (particularly in RNA-DNA hybrids). | + | B-DNA stacks similarly, but compare this with Z-DNA, which behaves much differently. Essentially all helical RNA is in A form, but DNA can also be found in A form under certain conditions (particularly in RNA-DNA hybrids). The 2'-OH of ribose favors the C3'-''endo'' sugar pucker necessary for A-form geometry. |
| - | The 2'-OH of ribose | + | |
You can compare it with the DNA forms by looking at this [http://proteopedia.org/wiki/images/d/d3/JnABZ3d.gif 3D red-blue stereo picture of A, B, and Z DNA] | You can compare it with the DNA forms by looking at this [http://proteopedia.org/wiki/images/d/d3/JnABZ3d.gif 3D red-blue stereo picture of A, B, and Z DNA] | ||
Revision as of 15:24, 21 February 2016
A-form RNA
| |||||||||||
References
R. E. Dickerson, H. R. Drew, B. N. Conner, R. M. Wing, A. V. Fratini & M. L. Kopka (1982) The anatomy of A-, B-, and Z-DNA. Science 216: 475-485 [1] JSmol in Proteopedia [2] or to the article describing Jmol [3] to the rescue.
