molsysmt.build.build_peptide#

molsysmt.build.build_peptide(molecular_system, to_form='molsysmt.MolSys', engine='MolSysMT')[source]#

Building a peptide from a sequence.

This function constructs a capped or uncapped peptide from a sequence of amino acids. It generates the complete atomic topology, including bonds, angles, and coordinates for the resulting system. Optionally, terminal capping groups can be included in the input sequence.

Parameters:

  • molecular_system (molecular system) – Molecular system in any supported MolSysMT format.

  • to_form (object, default='molsysmt.MolSys') – Argument to_form.

  • engine (str, default='MolSysMT') – Peptide-building engine. Use 'LEaP' explicitly to build with the optional AmberTools executable.

Returns:

A new molecular system representing the fully constructed peptide, including coordinates and all relevant topological information.

Return type:

molecular system

Raises:

  • NotImplementedError – Raised if the selected engine is not supported.

  • ArgumentError – Raised if the input sequence is invalid or contains unsupported codes.

  • NotSupportedFormError – Raised if the output form is not recognized or supported.

Notes

  • The sequence must contain amino acid and/or capping group codes recognized by the selected engine.

  • One- and three-letter peptide sequences are handled natively. Biopython is not needed for these string inputs.

  • String inputs are interpreted as peptide sequences in this context, even when the same characters are also valid SMILES.

  • Terminal caps can be specified explicitly by using residue names such as ‘ACE’ (N-terminus) and ‘NME’ (C-terminus).

  • The resulting structure is built in vacuum and can be subsequently solvated using molsysmt.build.solvate().

See also

molsysmt.build.add_missing_terminal_cappings()

Add terminal groups to complete or neutralize peptide ends.

molsysmt.build.solvate()

Surround a molecular system with solvent molecules.

molsysmt.structure.center()

Center a molecular system in a simulation box.

molsysmt.basic.view()

Visualize the resulting molecular system in a Jupyter notebook.

Examples

>>> import molsysmt as msm
>>> molsys = msm.build.build_peptide('AceGlyGlyNme')
>>> msm.basic.get(molsys, n_groups=True)
4

User guide

Follow this link for a tutorial on how to work with this function: User Guide > Tools > Build > Build peptide

Added in version 1.0.0.

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