Mineral Nutrition: Inducible and Repressible Nutrient Transport Systems

1991 ◽  
pp. 61-83 ◽  
Author(s):  
David T. Clarkson ◽  
Ulrich Lüttge
Keyword(s):  
Mineral Nutrition ◽  
Nutrient Transport ◽  
Transport Systems

scholarly journals Selective Nutrient Transport in Bacteria: Multicomponent Transporter Systems Reign Supreme

2021 ◽  
Vol 8 ◽  
Author(s):  
James S. Davies ◽  
Michael J. Currie ◽  
Joshua D. Wright ◽  
Michael C. Newton-Vesty ◽  
Rachel A. North ◽  
...  
Keyword(s):  
Nutrient Transport ◽  
Transport Systems ◽  
Multicomponent Transport ◽  
High Affinity ◽  
Wide Range ◽  
Membrane Bound ◽  
Transporter Systems ◽  
Substrate Binding Protein ◽  
Review Current

Multicomponent transporters are used by bacteria to transport a wide range of nutrients. These systems use a substrate-binding protein to bind the nutrient with high affinity and then deliver it to a membrane-bound transporter for uptake. Nutrient uptake pathways are linked to the colonisation potential and pathogenicity of bacteria in humans and may be candidates for antimicrobial targeting. Here we review current research into bacterial multicomponent transport systems, with an emphasis on the interaction at the membrane, as well as new perspectives on the role of lipids and higher oligomers in these complex systems.

Development of nutrient transport systems in chick jejunum

1984 ◽  
Vol 246 (2) ◽  
pp. G101-G107 ◽  
Author(s):  
A. T. Shehata ◽  
J. Lerner ◽  
D. S. Miller
Keyword(s):  
Brush Border ◽  
Brush Border Membrane ◽  
Nutrient Transport ◽  
Membrane Vesicles ◽  
Developmental Time ◽  
Weight Basis ◽  
Transport Systems ◽  
Beta Alanine ◽  
Sodium Gradient ◽  
Wet Weight

Glutamate, beta-alanine, choline, and myoinositol transport was characterized in jejunal slices and brush-border membrane vesicles from 2- and 21-day chicks. Carrier-mediated, i.e., competitor-inhibitable, transport in slices (wet weight basis) and vesicles (protein basis) declined with age for the two amino acids but increased with age for myo-inositol; transport of choline did not change. These findings, along with previous data for the hexose system, cannot be explained solely by nonspecific changes in brush-border membrane architecture or permeability or by changes in the electrochemical sodium gradient that drives cotransport. They indicate that each specific brush-border membrane transport mechanism follows separate developmental time tables.

Sign in / Sign up

Export Citation Format

Share Document