Nucleotide Binding Domains
Nucleotide Binding Domains - Related Videos
12:27
Polyelectrolyte Complex for Heparin Binding Domain Osteogenic Growth Factor Delivery
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Cited by 2 •
2016
Self-assembled polyelectrolyte complexes (PEC) fabricated from heparin and protamine were deposited on alginate beads to entrap and regulate the release of osteogenic growth factors. This delivery strategy enables a 20-fold reduction of BMP-2 dose in spinal fusion applications. This article illustrates the benefits and fabrication of PECs.
02:26
Conservation of Protein Domains Over Different Proteins
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2020
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms. A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
08:33
Measuring Nucleotide Binding to Intact, Functional Membrane Proteins in Real Time
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Cited by 3 •
2021
This protocol presents a method for measuring adenine nucleotide binding to receptors in real time in a cellular environment. Binding is measured as Förster resonance energy transfer (FRET) between trinitrophenyl nucleotide derivatives and protein labeled with a non-canonical, fluorescent amino acid.
14:25
Method for Efficient Refolding and Purification of Chemoreceptor Ligand Binding Domain
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Cited by 5 •
2017
A procedure is presented for the refolding of the dCACHE periplasmic ligand binding domain of Campylobacter jejuni chemoreceptor Tlp3 from inclusion bodies and the purification to yield milligram quantities of protein.
13:02
Production, Crystallization, and Structure Determination of the IKK-binding Domain of NEMO
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Cited by 5 •
2019
We describe protocols for the structure determination of the IKK-binding domain of NEMO by X-ray crystallography. The methods include protein expression, purification and characterization as well as strategies for successful crystal optimization and structure determination of the protein in its unbound form.
FAQs
Conserved amino acid motifs help nucleotide binding domains recognize and position ATP or GTP correctly. This arrangement supports interactions that connect nucleotide occupancy with protein conformation. As a result, binding can alter molecular activity rather than merely supplying a ligand. Examining these motifs helps explain how sequence changes may affect regulation, transport, or signaling.
The nucleotide bound helps place a protein domain in its functional context. In ATP-binding cassette transporters, ATP is linked to the work of moving substrates across membranes, whereas related GTPase domains use GTP-dependent switching in signaling pathways. This comparison shows that similar binding chemistry can support different cellular outputs, depending on the surrounding protein system.
Phosphate-bond hydrolysis changes the chemical state of the bound nucleotide and can drive a conformational transition in the protein. In many nucleotide binding domains, this transition switches the domain between active and inactive states. The cycle therefore links chemical energy consumption to changes in molecular behavior, allowing transporters and signaling proteins to regulate their activity.
Structural studies help show how conserved motifs position a nucleotide and how binding is connected to protein shape. Kinetic studies examine the behavior of binding and hydrolysis over time. Considering both types of information provides a fuller view of how a domain operates, helping researchers relate molecular architecture to regulatory performance and possible dysfunction.
ATP-binding cassette transporters contain paired nucleotide-binding domains that work together during the transport cycle. The domains bind and hydrolyze ATP, coupling phosphate-bond energy to substrate movement across a membrane. Studying this paired arrangement helps explain how a chemical event within the transporter produces the physical task of moving material between cellular compartments.
Changes in nucleotide binding domains can affect the regulation of transport or signaling because these regions connect nucleotide chemistry with protein activity. Structural and kinetic analysis can clarify how altered behavior contributes to disease mechanisms. Those insights also support the development of targeted therapeutics designed around the molecular features governing nucleotide binding, conformational switching, or hydrolysis.