text: def to_mmtf_MMTFDecoder(item, selection='all', frame_indices='all', syntaxis='MolSysMT'):
  
      from molsysmt.tools.file_mmtf import is_file_mmtf
      from molsysmt.basic import convert
  
      if not is_file_mmtf(item):
          raise ValueError
  
      tmp_item = convert(item, 'mmtf.MMTFDecoder', selection=selection, frame_indices=frame_indices, syntaxis=syntaxis)
  
      return tmp_item
  
  