Abc Transporters
Abc Transporters - Related Videos
01:31
ABC Transporters: Exporter
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2023
ATP-binding cassette or ABC transporter is the largest superfamily of integral membrane proteins. The transporters have transmembrane-binding domains (TMDs) and nucleotide-binding domains (NBDs). The TMDs are specific to their substrates, whereas the NBDs are similar to engines that complete ATP hydrolysis to complete the substrate transport. They can be full transporters consisting of two TMDs and NBDs, half transporters with one TMD and NBD, while some encoded with a single TMD or NBD are...
01:27
ABC Transporters: Importer
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2023
ATP-binding cassette or ABC transporters are a class of ATP-driven pumps that hydrolyze ATP to move solutes across the membrane. They can be grouped into importers and exporters. While exporters are present in all domains of life, importers exist only in bacteria and some plants. In bacteria, based on the number of transmembrane helices and the chemical nature of their substrates, the ABC importers can be divided into three types: Type I imports mostly metabolites such as sugars and amino...
12:25
A Step-by-step Method for the Reconstitution of an ABC Transporter into Nanodisc Lipid Particles
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Cited by 23 •
2012
Nanodiscs are small discoid particles that incorporate membrane proteins into a small patch of phospholipid bilayer. We provide a visual protocol that shows the step-by-step incorporation of the MalFGK2 transporter into a disc.
01:29
ABC Analysis
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2025
ABC analysis segments inventory into three categories based on the Pareto Principle, which suggests that a small percentage of inputs often accounts for a large percentage of outcomes. Category A represents items with the highest annual consumption value. These typically constitute a small fraction of total inventory items but represent the bulk of inventory cost, demanding close monitoring and frequent reordering. Category B items have moderate value and are managed with less intensity, while...
01:32
Transport and Acclimatization of Rodents for Research
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2026
All animal procedures described here must be conducted in accordance with institutional animal ethics guidelines and approved by IACUC. All procedures must follow the principles of the 3Rs—Replacement, Reduction, and Refinement—and must be performed by trained personnel. Transporting rodents for research requires procedures that minimize stress and maintain animal welfare during movement to minimize the influence on experimental outcomes. Transport cages should provide adequate ventilation,...
FAQs
ATP hydrolysis drives a cycle of alternating access. The nucleotide-binding domains bind and hydrolyze ATP, causing conformational changes in the transmembrane domains. These changes shift the substrate-binding site from one side of the membrane to the other, allowing transport without leaving the protein continuously open to either side. This cycle connects chemical energy with controlled molecular movement.
The nucleotide-binding domains provide the energy-processing component by binding and hydrolyzing ATP. The transmembrane domains contain the pathway and substrate-binding site whose orientation changes during the transport cycle. Communication between these regions is essential: ATP processing supplies the driving force, while transmembrane conformational changes determine how the transported molecule is exposed to opposite sides of the membrane.
Their transport activity applies to chemically diverse classes of molecules, including ions, lipids, metabolites, peptides, and drugs. This broad substrate range allows different ABC transporters to contribute to nutrient uptake, detoxification, and maintenance of membrane composition. It also explains why the transporter family has relevance across physiology, pharmacology, microbial survival, and cellular membrane biology.
By transporting drugs across biological membranes, ABC transporters can influence how much of a compound remains available inside or outside a cell. Increased or altered transporter activity may therefore affect drug accumulation and response, contributing to multidrug resistance. This relationship makes ABC transporters important in pharmacology and in studies examining why cells or microbes can survive exposure to multiple drugs.
Research examines how these proteins support nutrient uptake, cellular detoxification, membrane composition, and the movement of metabolites, lipids, peptides, and ions. Studies also connect transporter activity with drug absorption, multidrug resistance, microbial survival, and physiological function. Together, these applications help link membrane transport mechanisms with observable cellular and organism-level outcomes.
Genetic diseases can result when transporter function is disrupted, because altered activity may interfere with the movement of important molecules across membranes. Studying these proteins therefore connects molecular transport with physiology and disease mechanisms. Their role in drug absorption also gives ABC transporter research a pharmacological dimension, helping explain how transporter activity can influence responses to administered compounds.