Reaction Network Enumeration Profiler Panel — Novel Reaction Network Tab

For information about the controls at the bottom of the panel, see the Reaction Network Enumeration Profiler Panel topic.

  • Features
  • Additional Resources

Novel Reaction Network Tab Features

Swap fragments option and section
Import Selected Entries button

Import an entire network from the Project Table. All the fields in the panel are populated. You must select the entry group containing the network first. Importing a network allows you to edit it to replace the existing network or create a new network (by changing the reaction network name).

Groups of Conformers section

In this section, you can set up the input for structures at each stage of a reaction network. Each stage (reactant, transition state, intermediate, product) could have multiple structures - for example, you may have two reactants. For each structure there could be different conformations that potentially contribute to the reaction sequence. This section provides a set of tools that can be duplicated to allow you to specify input settings for the conformers of each structure. New entries in a new entry group are created for the conformers, with the settings are stored as properties. Note that you can specify a single structure—it is not necessary to have conformers.

Conformer group tools

This set of tools allows you to make settings for the conformers of a particular structure in reaction network, here referred to as a "conformer group". The settings enable you to specify atoms to keep and superimpose in subsequent uses of the Swap Fragments Panel, atoms to restrain in the MacroModel conformational search on the structure that can be done prior to optimization, and distances, angles, and dihedrals to restrain for the Jaguar (QM) preoptimization of transition states.

conformer group management buttons

These buttons perform display and ordering operations on the conformer group. They allow for easy duplication and rearrangement of conformer groups.

    Show or hide the contents of the conformer group. When hidden, only the conformer group number, label (if any) and these buttons are displayed. This is useful when you have a number of conformer groups and want to compare two separate conformer groups, for example.
Delete the conformer group.

The order of the groups does not matter, so you can move groups next to each other to make it easier to copy data from one to another.

Import from Selected Entries button

Import the conformer group from the entries that are selected in the Project Table. The selected entries must be conformers, i.e. have the same connectivity and atom numbering. You can have stereoisomers (R,S or E,Z) among the conformers as well as different geometric arrangements of rotatable groups. The entries must also have the multiplicity and molecular charge set as properties (see Add Standard Molecular Property Panel for more information).

Show in Workspace button

Display the first conformer in the Workspace, so that you can perform picking for distances, angles, or dihedrals to restrain.

Conformer group name text box

Enter the name you want to give to the new entry group that contains the conformer structures. The group is created when you click Run, and is added to the parent group, as specified below.

Sibling group name text box

Specify the sibling group (reaction stage) to which the current conformer group belongs. You can enter the name in the text box, or click the arrow to choose from already defined sibling group names.

Add parent group name option menu, Add button, text box, and Clear button

Specify the parent stages (one or more) for this stage, by sibling group name. Choose a parent from the option menu and click the Add button to add the parent. The option menu is populated from the Sibling group name fields of the conformer groups. The group name is displayed in the text box. To remove all parent names, click Clear.

Any stage can have multiple parents, and multiple stages can have the same parent. The parent information is used in the reaction network to identify the flow, which is useful when the reaction network scheme is not linear, e.g. there are branches in the reaction network scheme.

Indices of atoms to keep text box and Define button

Specify the atoms to keep in this structure when swapping fragments in the Swap Fragments Panel. These atoms do not need to be specified to run the reaction network (which does not use these data), but they are useful if you are planning to prepare another set of structures based on this structure for the reaction network.

You can enter the atom indices as a comma-separated list, or click Define to use the standard Picking Tools to select the atoms.

Indices of superposable atoms text box and Pick atoms option

Specify the atoms in this structure to superimpose on another structure when swapping fragments in the Swap Fragments Panel. These atoms do not need to be specified to run the reaction network (which does not use these data), but they are useful if you are planning to prepare another set of structures based on this structure for the reaction network.

You can enter the atom indices as a comma-separated list, or select Pick atoms to pick the atoms in the Workspace. The order of the atom indices is important: the atom pairs to be superimposed are taken by matching the lists of superimposable atoms in the order given.

Indices of atoms to restrain text box and Define button

Specify the atoms to restrain in the MacroModel conformational search that can be performed on this structure in the Reaction Network Profiler Panel. In addition to restraining parts of the structure that you don't want to vary in the conformational search, you should specify any atom that does not have (good) force field parameters or are not treated well by the force field, such as metal atoms and eta-bonded ligand atoms.

You can enter the atom indices as a comma-separated list, or click Define to use the standard Picking Tools to select the atoms.

Atom index pairs of distances to restrain text box and Pick pairs option

Specify distances to restrain in the quantum-mechanical optimization of the structure. Enter the atom pairs for the distances in the text box in the format (i,j);(k,l);... or select Pick pairs and pick pairs of atoms in the Workspace to define the distances to restrain. For a transition state, these distances are frozen in the preoptimization of the structure, and then converted to active coordinates for the transition state search. For other structures, it is not recommended to apply restraints, as only a single optimization is performed.

Atom index triples of angles to restrain text box and Pick triples option

Specify angles to restrain in the quantum-mechanical optimization of the structure. Enter the atom triples for the angles in the text box in the format (i,j,k);(l,m,n);... or select Pick triples and pick three atoms in the Workspace for each angle you want to restrain. For a transition state search, these angles are frozen in the preoptimization of the structure, and then converted to active coordinates for the transition state search. For other structures, it is not recommended to apply restraints, as only a single optimization is performed.

Atom index quadruples of dihedrals to restrain text box and Pick quadruples option

Specify dihedrals to restrain in the quantum-mechanical optimization of the structure. Enter the atom index quadruples for the dihedrals in the text box in the format (i,j,k,l);(m,n,o,p)... or select Pick quadruples and pick four atoms in the Workspace for each dihedral you want to restrain. For a transition state search, these dihedrals are frozen in the preoptimization of the structure, and then converted to active coordinates for the transition state search. For other structures, it is not recommended to apply restraints, as only a single optimization is performed.

Transition state option

Mark this structure as a transition state structure. In the reaction network, a transition state search is performed if this option is set, otherwise a minimization is performed.

R-Group Site Indices table

Specify R-group enumeration sites as a pair of bonded atoms. Use the Add Row button to add a row. In each row, enter the (from, to) atom index pairs in the text box in the format (i,j);(k,l);... or select Pick pairs and pick pairs of atoms in the Workspace to define the enumerate site. Pairs to be used with same set of enumeration groups should be listed in the same row. Pairs to be used with different sets of enumeration groups should be listed in different rows. The R-group files from which to draw for each row are specified in the Import R-group File table. In addition to the standard R-groups with a single attachment point these files can contain R-groups with multiple attachment points. If a file contains an R-group with n attachment points and the row that draws from this file defines n (from, to) pairs then the that R-group will be included in the enumeration.

Add Row button

Add a row to the R-Group Site Indices table.

Remove Selected Rows button

Remove selected rows in the R-Group Site Indices table. Select one or more rows by clicking on the row number.

Reaction network name text box

Name of the reaction network to which all the conformer groups are added. This defines a "super group". You can use the same group names for the conformer groups in different reaction networks and keep the groups distinct (as they are now subgroups).

Specify a representation of haptic ligands option and menu

Choose a bond representation of ligands in haptic complexes, from:

  • Bond to Centroid—Metal center is bonded to a dummy atom at the center of a haptic ligand.
  • Bonds to Atoms—Metal center is bonded to all atoms in the haptic ligand.

Only available if a haptic complex is added as a conformer group.

Import R-Group File table

Add any R-group files to the table by clicking the Add Row button and then clicking the Import File button in the new row that appears. Files should be Maestro files containing R-groups prepared with the R-Group Creator Panel. Multiple files can be added.

Add Row button

Add a row in the Import R-Group File table

Remove Selected Rows button

Highlight one or more rows in the table, and click this button to delete the highlighted rows.

Require identical bonds option
Select to ensure bonds being created when swapping novel and reference catalysts exist in both structures and be of the same bond order. If this option is not selected, all bonds being cut in the novel structure are created provided that there is a reference "keep" atom corresponding to the novel "replace" atom.
Only heterogeneous groups from R-group files option

Select this option to return hetero-enumerated results when sites with different enumeration indices use the same R-group file. If this option is not selected, both hetero- and homo-enumerated results are returned. Only available if a file has been added to the Import R-Group File table.

Only enumerate reaction workflow files option

Use this option to create all reaction workflow files without running each reaction workflow as a subjob. These files include any swaps with a given novel structure and any R-group enumerations.

Color collections of atom indices to be kept and replaced color chooser buttons and Color button

Specify the color to be used in the Workspace for the atoms to be kept and replaced, by clicking the color to open a color chooser. The atoms are colored in the Workspace when you click the Color button.

Tutorials

Related Topics