Symmetry - Revision history

Cchem: 6 revisions

2020-12-07T04:05:37Z

6 revisions

Bosmith at 16:24, 17 November 2020

2020-11-17T16:24:36Z

Bosmith at 16:21, 17 November 2020

2020-11-17T16:21:46Z

Bosmith at 16:16, 17 November 2020

2020-11-17T16:16:37Z

Bosmith: /* symexp */

2020-11-17T16:10:44Z

symexp

Bosmith: /* https://pymolwiki.org/index.php/Symexp */

2020-11-17T16:10:19Z

https://pymolwiki.org/index.php/Symexp

Bosmith: Created page with "There are many ways that symmetry can be important/useful/beautiful to look at in macromolecular structures. A typically application is the reconstruction of a symmetry oligom..."

2020-11-17T16:07:40Z

Created page with "There are many ways that symmetry can be important/useful/beautiful to look at in macromolecular structures. A typically application is the reconstruction of a symmetry oligom..."

New page

There are many ways that symmetry can be important/useful/beautiful to look at in macromolecular structures. A typically application is the reconstruction of a symmetry oligomer from a few subunits. PyMOL has tools that can help with this type of analysis or depiction.

== Expanding crystallographic symmetry ==
Structures determined by X-ray crystallography are typically deposited as files containing the coordinates for one asymmetric unit (ASU). Knowledge of the symmetry operators that describe how the ASUs are arranged relative to each other allows the arrangement of the crystal lattice to be recreated. PyMOL can read this symmetry information from the input coordinate file and recreate the neigbouring copies of the ASU using symmexp.

=== [[https://pymolwiki.org/index.php/Symexp]] ===

== Displaying symmetry axes ==

← Older revision		Revision as of 16:24, 17 November 2020
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−	There are many ways that symmetry can be important/useful/beautiful to look at in macromolecular structures. A typically application is the reconstruction of a ~~symmetry~~ oligomer from a few subunits. PyMOL has tools that can help with this type of analysis or depiction.	+	There are many ways that symmetry can be important/useful/beautiful to look at in macromolecular structures. A typically application is the reconstruction of a symmetric oligomer from a few subunits. PyMOL has tools that can help with this type of analysis or depiction.

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 Structures determined by X-ray crystallography are typically deposited as files containing the coordinates for one asymmetric unit (ASU). Knowledge of the symmetry operators that describe how the ASUs are arranged relative to each other allows the arrangement of the crystal lattice to be recreated. PyMOL can read this symmetry information from the input coordinate file and recreate the neigbouring copies of the ASU using symmexp.
 PyMOL's built in symmetry expansion functionality is available as A->generate->symmetry mates for an object or as the [[symexp]] command.
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 == Displaying symmetry axes ==
-Often it is necessary to be able to find and draw symmetry axes. There are some contributed scripts that help do this including:
+Often it is necessary to be able to find and draw symmetry axes. There are some contributed scripts that help do this including [[Symmetry Axis]], for which you need to know the coordinates and direction of the axis you would like to draw, and [[RotationAxis]], which does an excellent job of displaying symmetry relationships between selections.
-[[Symmetry Axis]]
-[[RotationAxis]]

@@ Line 1: / Line 1: @@
 There are many ways that symmetry can be important/useful/beautiful to look at in macromolecular structures. A typically application is the reconstruction of a symmetry oligomer from a few subunits. PyMOL has tools that can help with this type of analysis or depiction.
@@ Line 6: / Line 7: @@
 === symexp ===
-PyMOL's built in symmetry expansion functionality is available as A->generate->symmetry mates for an object or as the [[symexp]] command
+PyMOL's built in symmetry expansion functionality is available as A->generate->symmetry mates for an object or as the [[symexp]] command.
 == Displaying symmetry axes ==

@@ Line 6: / Line 6: @@
 === symexp ===
-PyMOL's built in symmetry expansion functionality is available as A->generate->symmetry mates for an object or as the [[Symexp]]command
+PyMOL's built in symmetry expansion functionality is available as A->generate->symmetry mates for an object or as the [[symexp]] command
 == Displaying symmetry axes ==

← Older revision	Revision as of 04:05, 7 December 2020
(No difference)