Protein that moves other materials within an organism
Schematic description of the mechanism of thesodium-potassium pump. Four consecutive steps are shown, from left to right. (1) Three sodium ions enter the transporter on the cell internal side. (2) A phosphorylated group is added to the transporter from ATP. This causes the transporter to close on the inside and open on the outside. The sodium ions then leave to the outside. (3) Two potassium ions enter the transporter from the outside. (4) The transporter opens to the inside while both the potassium ions and the phosphorylated group leaves it.
Atransport protein (variously referred to as atransmembrane pump,transporter,escort protein, acid transport protein,cation transport protein, oranion transport protein) is aprotein that serves the function of moving other materials within anorganism. Transport proteins are vital to the growth and life of all living things. There are several different kinds of transport proteins.
The proteins may assist in the movement of substances byfacilitated diffusion (i.e., passive transport) oractive transport. These mechanisms of movement are known ascarrier-mediated transport.[2] Each carrier protein is designed to recognize only one substance or one group of very similar substances. Research suggests that potassium, calcium and sodium channels can function as oxygen sensors in mammals and plants,[3][4] and has correlated defects in specific carrier proteins with specific diseases.[5]
^Sadava, David, et al. Life, the Science of Biology, 9th Edition. Macmillan Publishers, 2009.ISBN1-4292-1962-9. pg 119.
^Thompson, Liz A. Passing the North Carolina End of Course Test for Biology. American Book Company, Inc. 2007.ISBN1-59807-139-4. pg. 97.
^Kemp, Paul J.; Peers, Chris (10 August 2007). "Oxygen sensing by ion channels".Essays in Biochemistry.43:77–90.doi:10.1042/bse0430077.
^Huang, Xin; Shabala, Lana; Zhang, Xuechen; Zhou, Meixue; Voesenek, Laurentius A C J; Hartman, Sjon; Yu, Min; Shabala, Sergey (27 January 2022). "Cation transporters in cell fate determination and plant adaptive responses to a low-oxygen environment".Journal of Experimental Botany.73 (3):636–645.doi:10.1093/jxb/erab480.
^Sadava, David, Et al. Life, the Science of Biology, 9th Edition. Macmillan Publishers, 2009.ISBN1-4292-1962-9. pg 119.
