A transport protein is a protein involved in facilitated diffusion. Changes in the conformation move the binding site to the opposite side of the protein.
There are 3 types of transport proteins, uniporter, symporter/coporter, and antiporter, which facilitate different modes of transport.
Transport proteins are also used in active transport. The proteins bind to the larger molecule needed within the cell and guide it into the cell, moving particles against the concentration gradient.
See also ...
transport protein See carrier protein.
Online Biology Dictionary (TRANSPOS-)
transposase An enzyme capable of catalyzing the insertion of a transposon.
Transport proteins embedded in the membrane can speed movement across the membrane.
Some transport proteins bind selectively to a solute on one side of the membrane and release it on the opposite side.
Others act as selective channels, providing a selective passageway across the membrane.
A transport protein can move various ions and molecules, they are distinguished according to their directionality: ...
A ~ in the plasma membranes of a plant or animal cell that specifically facilitates the diffusion of water across the membrane (osmosis).
A solution in which water is the solvent.
The ~s integrated into the cell membrane are often highly selective about the chemicals they allow to cross.
~s: 1. Uniport- one molecule moves in only one direction. 2. Symport - Two different molecules moving in only one direction. 3. Antiport - Two molecules moving in opposite directions.
transportase --> ~
(Science: protein) A class of transmembrane protein that allows substances to cross plasma membranes far faster than would be possible by diffusion alone.
Glucose binds to ~
Transporter changers conformation and glucose is released into cell
Intracellular glucose is immediately phosphorylated ...
The common types of proteins that are found in biological systems are enzymes, antibodies, ~s, regulatory proteins, and structural proteins.
UNC-76 is required for axonal outgrowth and fasciculation in worms and its homolog in Drosophila is an axonal ~ [14,15]. We identified a 19-amino-acid segment (amino acids 281-299) in UNC-76 that is necessary for its interaction with UNC-69, and possibly for its in vivo function.
The sodium-potassium pump is the ~ that maintains the concentration gradient of these ions between the intra and the extracellular spaces. This protein is phosphorylated in each pumping cycle and then it pumps three sodium ions outside the cell and puts two potassium ions inwards.
The outer layer of the double membrane is much more permeable than the inner layer, which features a number of embedded membrane ~s.
Drinking the solution stimulates Na+ and glucose uptake by co-~s
H2O is absorbed from small intestine
ORT increases performance of co-~s / adequate amounts of glucose and Na+ pass into intestinal cells / clears up attack of diarrhoea ...
After sorting, the membrane of the golgi buds off, forming secretory vesicles that ~s to their specific destination in the cell. A protein's destination is often signaled with a specific amino acid sequence at its end.
carrier proteins - membrane ~ that binds to a solute and transports it across the membrane by undergoing a series of conformational changes ...
Real biological membranes are semi-permeable; they can be used both to store and access energy. The movement of different molecules across them differ based on which ~s are present and active.
active transport A process that requires an expenditure of ATP energy to move molecules across a cell membrane; usually moved against the concentration gradient with the aid of specific ~s.
A parameter that describes the affinity of an enzyme for its substrate and equals the substrate concentration that yields the half-maximal reaction rate; also called the Michaelis constant. A similar parameter describes the affinity of a ~ for the transported molecule or the affinity ...
We used to think that it was a regulated process of how nucleic acids such as mRNAs moved out of the cell nucleus, and recently we've become more aware that there also is a regulated process by which cells ~s and nucleic acids into the nucleus, so this is a dynamic process.
See also: What is the meaning of Protein, Trans, Cell, Membrane, Proteins?