Glycogen synthesis jump-starts photosynthesis through the G6P shunt in cyanobacteria
Ontology highlight
ABSTRACT:
INSTRUMENT(S): LTQ Orbitrap
ORGANISM(S): Synechococcus Elongatus Pcc 7942 (ncbitaxon:1140)
SUBMITTER: 
XIN WANG
PROVIDER: MSV000083575 | MassIVE | Thu Mar 14 15:27:00 GMT 2019
SECONDARY ACCESSION(S): PXD013099
REPOSITORIES: MassIVE
Publications
Glycogen Metabolism Supports Photosynthesis Start through the Oxidative Pentose Phosphate Pathway in Cyanobacteria.
Shinde Shrameeta S Zhang Xiaohui X Singapuri Sonali P SP Kalra Isha I Liu Xianhua X Morgan-Kiss Rachael M RM Wang Xin X
Plant physiology 20191024 1
Cyanobacteria experience drastic changes in their carbon metabolism under daily light/dark cycles. During the day, the Calvin-Benson cycle fixes CO<sub>2</sub> and diverts excess carbon into glycogen storage. At night, glycogen is degraded to support cellular respiration. The dark/light transition represents a universal environmental stress for cyanobacteria and other photosynthetic lifeforms. Recent studies revealed the essential genetic background necessary for the fitness of cyanobacteria dur ...[more]
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Project description:In the unicellular cyanobacterium, Synechococcus elongatus PCC 7942, most of genes are downregulated in the dark, while 10% of genes are upregulated. Here, we employed high-density oligonucleotide arrays to explore comprehensive profiles of genome-wide Synechococcus gene expression in wild type and kaiABC-null strains under continuous dark (DD) conditions. We found that expression profile of a subset of genes on the genome in DD was dramatically affected by kaiABC-nullification, and the magnitude of dark-induction was dependent on time when cells were transferred from light to DD Keywords: timecourse data (0-12 h) under continuous darkness after dark:light cycles from Synechococcus elongatus PCC 7942 wild type and kaiABC-null strains
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