membrane transport


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Related to membrane transport: Membrane transport proteins

membrane transport

The active movement of proteins from the site of production in the cell to the site of storage or to the cell membrane for eventual release. Membrane transport requires:
(1) Translocation-competent membranes (e.g., endoplasmic reticulum, peroxisomal membrane and the mitochondrial inner membrane); and
(2) Membrane-targeting signals to direct the molecules, often in the form of an NH2-terminal oligopeptide with peroxisomal target proteins.

The transported protein or preprotein has one of two basic structures: either a completely hydrophilic primary sequence or one which is hydrophilic at both the NH2 and COOH ends, separated in the middle by an apolar hydrophobic core.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
References in periodicals archive ?
Peritoneal protein clearance and not peritoneal membrane transport status predicts survival in a contemporary cohort of peritoneal dialysis patients.
Janace, Cell Membrane Transport, Plenum, New York, NY, USA, 1975.
Hernandez, "Stability properties of elementary dynamic models of membrane transport," in Bulletin of Mathematical Biology, vol.
Quinn, "The Prediction of Facilitation Factors for Reaction on Augmented Membrane Transport," AIChE J.
The Nerve Impulse and Membrane Transport lessons also utilize the same instructional approaches to convey the processes occurring.
As one would expect from the title, this volume addresses a wide array of plant processes, in addition to nutrient assimilation, that require pH gradients to function, including membrane transport, cell wall expansion, photosynthetic metabolism, mitochondrial function, regulation of metabolic pathways, plant signaling pathways, and plant-microbe interactions.
Cytoplasmic dynein (CD) is a microtubule motor protein responsible for multiple aspects of membrane transport and chromosomal segregation during mitosis.
Several cell types from patients with AD have been reported to have altered membrane fluidity, both increased and decreased.[12,39,40] Although increased fluidity might lead to higher rate constants for membrane transport, it is unlikely that fluidity makes a major contribution to the abnormal kinetics of band 3, because 2 laboratories have independently found no difference in erythrocyte membrane fluidity between patients with AD and controls.[41,42] Chauhan et al[43] found that synthetic A[Beta] stimulates casein kinase I in erythrocytes, leading to increased phosphorylation of membrane proteins.
A third mechanism of resistance is the alteration by gram-negative bacteria of their outer membrane transport channels that serve as the bacterium's own transport system, and which also allow the antibiotic to enter the organism.
Physiological topics covered include muscle, cardiac and circulatory, respiratory, gastrointestinal, renal, membrane transport and bioelectric activity, endocrinology, and brain function.
Superfluous ventricular contraction spikes and prolonged plateaus suggest that disturbed membrane transport leads to the failure of neurotransmitter release and (or) myocardial excitation in the neuromuscular system of the heart.

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