An "inordinate fondness for transporters" explained?

Abstract:

:An often-asked question is, Why are there so many different transporters in a cell to take up a particular substrate? At least part of the answer comes from work on the possible competitive advantage of dual-transporter systems. In such systems, low-affinity transporters function when a nutrient is plentiful in the environment, and the abundance of high-affinity transporters is increased when that nutrient becomes scarce. A dual-transporter system enabled a long "preparation phase" to occur during which cells induce gene expression as they become increasingly starved. Surprisingly, the preparation phase is important not for growth under low-nutrient conditions but rather for fluctuating nutrient amounts as commonly occurs in nature. Thus, this creative study provides a previously unconsidered explanation for the abundance of dual-transporter systems in biology.

journal_name

Sci Signal

journal_title

Science signaling

authors

Eide DJ

doi

10.1126/scisignal.2002837

subject

Has Abstract

pub_date

2012-02-07 00:00:00

pages

pe5

issue

210

eissn

1945-0877

issn

1937-9145

pii

scisignal.2002837

journal_volume

5

pub_type

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