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PHEMDD

Phosphate homeostasis and energy metabolism in Dictyostelium discoideum

Total Cost €

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EC-Contrib. €

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Partnership

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Project "PHEMDD" data sheet

The following table provides information about the project.

Coordinator
UNIVERSITY COLLEGE LONDON 

Organization address
address: GOWER STREET
city: LONDON
postcode: WC1E 6BT
website: n.a.

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Project website https://www.ucl.ac.uk/lmcb/users/adolfo-saiardi
 Total cost 195˙454 €
 EC max contribution 195˙454 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2016
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2017
 Duration (year-month-day) from 2017-07-01   to  2019-06-30

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    UNIVERSITY COLLEGE LONDON UK (LONDON) coordinator 195˙454.00

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 Project objective

Adenosine triphosphate (ATP) is the universal biological energy currency. Its cellular concentration is tightly regulated and depends on rates of glycolysis, oxidative phosphorylation, and obviously on phosphate availability. How is phosphate concentration regulated as a function of the cell’s demands? Inositol pyrophosphates, described as metabolic messengers, are excellent candidates to orchestrate phosphate homeostasis and energy metabolism. The research programme proposed here aims to elucidate the relationships between phosphate homeostasis, energy metabolism, and inositol pyrophosphates using the amoeba Dictyostelium discoideum as a model system. This organism has high levels of inositol pyrophosphates and inorganic polyphosphate (polyP) and, surprisingly, a comparatively low level of ATP, suggesting that inositol pyrophosphates may serve as a phosphate reservoir for ATP production. I will use a combination of metabolomics analysis, steady-state and dynamic flux analysis of ATP, polyP, Pi and inositol pyrophosphate levels, and a functional analysis of mitochondria to evaluate the impact of polyP and inositol pyrophosphates on the metabolic/energetic state of this organism. I will investigate the function of polyP, which is induced during development, to understand how and why phosphate homeostasis is so dramatically modified during this process. This will be the first comprehensive analysis of the relationships between phosphate homeostasis and energy metabolism in eukaryotes.

 Publications

year authors and title journal last update
List of publications.
2019 Yann Desfougères, Miranda S. C. Wilson, Debabrata Laha, Gregory J. Miller, Adolfo Saiardi
ITPK1 mediates the lipid-independent synthesis of inositol phosphates controlled by metabolism
published pages: 201911431, ISSN: 0027-8424, DOI: 10.1073/pnas.1911431116
Proceedings of the National Academy of Sciences 2019-12-16

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