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The PDBbind database is a comprehensive collection of experimentally measured binding affinity data (Kd, Ki, and IC50) for the protein-ligand complexes deposited in the Protein Data Bank (PDB). [ 1 ] [ 2 ] It thus provides a link between energetic and structural information of protein-ligand complexes, which is of great value to various studies ...
The data in SMID is derived from the Protein Data Bank (PDB), a database of known protein crystal structures. SMID can be queried by entering a protein GI, domain identifier, PDB ID or SMID ID. The results of a search provide small molecule, protein, and domain information for each interaction identified in the database.
A NIST-sponsored workshop in September 1997 validated the concept, and funding from the NSF and NIST enabled initial development of the database with a collection of data for systems of many types, including protein-ligand, protein-protein, and host–guest binding. However, hopes that the database would be populated primarily through ...
In protein-ligand binding, the ligand is usually a molecule which produces a signal by binding to a site on a target protein. The binding typically results in a change of conformational isomerism (conformation) of the target protein. In DNA-ligand binding studies, the ligand can be a small molecule, ion, [1] or protein [2] which binds to the ...
I-TASSER has been extended for structure-based protein function predictions, which provides annotations on ligand binding site, gene ontology and enzyme commission by structurally matching structural models of the target protein to the known proteins in protein function databases.
Upon binding of an analyte to the ligand, the real-time kinetic rates (k on, k off) can be measured as changes in fluorescence intensity and the K d can be derived. This method can be used to investigate protein-protein interactions, as well as to investigate modulators of protein-protein interactions by assessing ternary complex formation.
Compared to ChIP-chip, ChIP-seq data can be used to locate the binding site within few tens of base pairs of the actual protein binding site. Tag densities at the binding sites are a good indicator of protein–DNA binding affinity, [14] which makes it easier to quantify and compare binding affinities of a protein to different DNA sites. [15]
The GPCRdb database is the main repository of curated data for G protein-coupled receptors (GPCRs). It integrates various web tools and diagrams for GPCR analysis and stores manual annotations of all GPCR crystal structures made available through the PDB (Protein Data Bank), has the largest collections of receptor mutants and reference sequence alignments.