Molecular Networking
Molecular Networking - Related Videos
02:26
Protein Networks
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2020
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions. These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
02:18
Network Covalent Solids
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2020
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds. To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
09:55
Molecular Cloning
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2023
Molecular cloning is a set of methods, which are used to insert recombinant DNA into a vector - a carrier of DNA molecules that will replicate recombinant DNA fragments in host organisms. The DNA fragment, which may be a gene, can be isolated from a prokaryotic or eukaryotic specimen. Following isolation of the fragment of interest, or insert, both the vector and insert must be cut with restriction enzymes and purified. The purified pieces are joined together though a technique called...
12:02
Molecular Evolution of the Tre Recombinase
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Cited by 4 •
2008
Here we report the generation of Tre recombinase through directed, molecular evolution. Tre recombinase recognizes a pre-defined target sequence within the LTR sequences of the HIV-1 provirus, resulting in the excision and eradication of the provirus from infected human cells. While still in its infancy, directed molecular evolution will allow the creation of custom enzymes that will serve as tools of molecular surgery and molecular medicine.
02:00
Molecular Models
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2020
Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules. Skeletal Model Simpler two-dimensional representations of chemical compounds are accomplished using skeletal models. The illustration shows only the molecular framework or bonds without explicitly showing the atoms. In this representation, many of the carbon atoms...
FAQs
It compares tandem mass spectrometry fragmentation patterns rather than examining molecular features in isolation. When two observed spectra share similar fragment patterns, their corresponding nodes are connected, indicating shared structural characteristics. Groups of connected nodes can therefore reveal compound families within a mixture, helping chemists interpret related molecules even when the sample contains many overlapping chemical signals.
Nodes represent observed molecular features or fragmentation spectra, while edges express spectral similarity between them. A dense group of connected nodes suggests that several detected molecules share related fragmentation behavior and may belong to the same compound family. This network structure provides a visual way to examine chemical diversity and recognize relationships that may be difficult to see in a conventional list of signals.
Spectral relationships become more informative when they are linked with experimental metadata. Information about the samples or experimental conditions can show where related molecular features occur and help connect chemical patterns with the broader investigation. In chemistry, this combined view supports decisions about which compound families deserve further examination, especially when prioritizing biologically relevant or potentially novel molecules.
Clusters of related spectra can place known and uncharacterized molecular features within the same chemical context. A feature connected to an established compound family may receive a more informed annotation, while an unusual or insufficiently characterized relationship can highlight a candidate for further study. This prioritization helps direct attention toward potentially novel compounds instead of treating every detected signal as equally important.
A typical workflow begins with tandem mass spectrometry data from a complex chemical mixture. The observed fragmentation spectra are compared, related features are organized into a network, and the resulting groups are examined alongside experimental metadata. Chemists can then use the pattern of related nodes to support compound annotation, assess chemical diversity, and select targets for additional investigation or purification.
Molecular Networking is useful when researchers need to interpret chemically complex samples and decide which molecules warrant follow-up. In natural products and metabolomics, it helps visualize related chemical features and support annotation of known metabolites. In drug-discovery investigations, the same relationships can assist with prioritizing biologically relevant or potentially novel compounds and with planning purification strategies.