NDLI: Investigation of the Gracilaria gracilis (Gracilariales, Rhodophyta) proteome response to nitrogen limitation.

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Investigation of the Gracilaria gracilis (Gracilariales, Rhodophyta) proteome response to nitrogen limitation.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Naidoo, Rene K. Rafudeen, Muhammad S. Coyne, Vernon E.
Description	Country affiliation: South Africa Author Affiliation: Naidoo RK ( Molecular and Cell Biology Department, University of Cape Town, Rondebosch, Cape Town, 7700, South Africa.); Rafudeen MS ( Molecular and Cell Biology Department, University of Cape Town, Rondebosch, Cape Town, 7700, South Africa.); Coyne VE ( Molecular and Cell Biology Department, University of Cape Town, Rondebosch, Cape Town, 7700, South Africa.)
Abstract	Inorganic nitrogen has been identified as the major growth-limiting nutritional factor affecting Gracilaria gracilis populations in South Africa. Although the physiological mechanisms implemented by G. gracilis for adaption to low nitrogen environments have been investigated, little is known about the molecular mechanisms of these adaptions. This study provides the first investigation of G. gracilis proteome changes in response to nitrogen limitation and subsequent recovery. A differential proteomics approach employing two-dimensional gel electrophoresis and liquid chromatography-tandem mass spectrometry was used to investigate G. gracilis proteome changes in response to nitrogen limitation and recovery. The putative identity of 22 proteins that changed significantly (P < 0.05) in abundance in response to nitrogen limitation and recovery was determined. The identified proteins function in a range of biological processes including glycolysis, photosynthesis, ATP synthesis, galactose metabolism, protein-refolding and biosynthesis, nitrogen metabolism and cytoskeleton remodeling. The identity of fructose 1,6 biphosphate (FBP) aldolase was confirmed by western blot analysis and the decreased abundance of FBP aldolase observed with two-dimensional gel electrophoresis was validated by enzyme assays and western blots. The identification of key proteins and pathways involved in the G. gracilis nitrogen stress response provide a better understanding of G. gracilis proteome responses to varying degrees of nitrogen limitation and is the first step in the identification of biomarkers for monitoring the nitrogen status of cultivated G. gracilis populations.
File Format	HTM / HTML
ISSN	00223646
Issue Number	3
Journal	Journal of Phycology
Volume Number	52
e-ISSN	15298817
Language	English
Publisher	Wiley
Publisher Date	2016-06-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Botany
Content Type	Text
Resource Type	Article
Subject	Plant Science Aquatic Science

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