Comment on "load-induced modulation of signal transduction networks": reconciling ultrasensitivity with bifunctionality?

Abstract:

:Jiang et al. (Research Article, 11 October 2011, DOI: 10.1126/scisignal.2002152) used a combined experimental and computational modeling approach to study the dynamic response behavior of covalent modification cycles in the presence of downstream targets ("loads"). Despite remarkable agreement between experiments and model predictions, there exists an apparent discrepancy in their approach because the utilized theoretical model does not reflect the bifunctional nature of the enzyme system used in experiments. Furthermore, a simple extension of the model to the case of bifunctional enzymes yields predictions that are partially at variance with the experimental results. It seems that an appropriate mechanistic model would have to reconcile two apparent contradictory concepts: ultrasensitivity and bifunctionality.

journal_name

Sci Signal

journal_title

Science signaling

authors

Straube R

doi

10.1126/scisignal.2002699

subject

Has Abstract

pub_date

2012-01-03 00:00:00

pages

lc1; author reply lc2

issue

205

eissn

1945-0877

issn

1937-9145

pii

5/205/lc1

journal_volume

5

pub_type

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