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ERIC Number: EJ895556
Record Type: Journal
Publication Date: 2010
Pages: 4
Abstractor: As Provided
ISSN: ISSN-1470-8175
Cation Transport Coupled to ATP Hydrolysis by the (Na, K)-ATPase: An Integrated, Animated Model
Leone, Francisco A.; Furriel, Rosa P. M.; McNamara, John C.; Horisberger, Jean D.; Borin, Ivana A.
Biochemistry and Molecular Biology Education, v38 n4 p276-279 Jul-Aug 2010
An Adobe[R] animation is presented for use in undergraduate Biochemistry courses, illustrating the mechanism of Na[superscript +] and K[superscript +] translocation coupled to ATP hydrolysis by the (Na, K)-ATPase, a P[subscript 2c]-type ATPase, or ATP-powered ion pump that actively translocates cations across plasma membranes. The enzyme is also known as an E[subscript 1]/E[subscript 2]-ATPase as it undergoes conformational changes between the E[subscript 1] and E[subscript 2] forms during the pumping cycle, altering the affinity and accessibility of the transmembrane ion-binding sites. The animation is based on Horisberger's scheme that incorporates the most recent significant findings to have improved our understanding of the (Na, K)-ATPase structure-function relationship. The movements of the various domains within the (Na, K)-ATPase [alpha]-subunit illustrate the conformational changes that occur during Na[superscript +] and K[superscript +] translocation across the membrane and emphasize involvement of the actuator, nucleotide, and phosphorylation domains, that is, the "core engine" of the pump, with respect to ATP binding, cation transport, and ADP and P[subscript i] release. (Contains 1 figure.)
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A