摘要:
There is described a group of novel self-assembling peptides (SAPs), comprising biotinylated and unbiotinylated sequences, hybrid peptide-peptoid sequences, branched sequences for a total of 48 tested motifs, showing a heterogeneous ensemble of spontaneously self-assembled structures at the nano- and microscale, ranging from short tabular fibers to twisted ribbons, nanotubes and hierarchical self-assembled micrometer-long sheets. Specifically, the SAPs according to the present invention which initially spontaneous assemble, surprisingly form stable solid scaffolds upon exposure to neutral pH buffer. Further these SAPs allow adhesion, proliferation and differentiaton of murine and human neural stem cells and have self-healing propensity. They also did not exert toxic effects in the central nervous system, can stop bleeding and foster nervous regeneration. Therefore, the SAPs according to the present invention are improved biomaterials, a highly valid and useful alternative which may replace the known SAPs, thus overcoming the disadvantages related thereto.
摘要:
A method of construction and selection of virtual libraries in combinatorial chemistry is described, comprising the steps of: preparing a three-dimensional structure of a target macromolecule (PROT); determining one or more receptor sites of the macromolecular target (PROT); creating a first virtual library (300) of compounds starting with at least one input library (100;200); calculating a plurality of molecular descriptors for each molecule of the first virtual library (300), generating a second virtual library (400) containing each molecule of the first library (100; 200; 50) and the values of the molecular descriptors; selecting a representative subset (500) of the second virtual library (400); calculating for each molecule belonging to the representative subset a value of a quantity ( E dock ) associated with the formation of a bond between the target macromolecule (PROT) and each molecule belonging to the representative subset (500); and obtaining by way of simulation through "Machine Learning" methods for each molecule of a plurality of molecules of the second virtual library (400) and not belonging to the representative subset (500) a value of the quantity ( E dock ) associated with the formation of a bond between the macromolecular target (PROT) and each molecule of a plurality of molecules not belonging to the representative subset (500).