Foldase

In molecular biology, foldases are a particular kind of molecular chaperones that assist the non-covalent folding of proteins in an ATP-dependent manner. Examples of foldase systems are the GroEL/GroES and the DnaK/DnaJ/GrpE system.
References.
http://www.embl.de/pepcore/pepcore_services/protein_expression/ecoli/improving_protein_solubility/