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Cysteine-Mediated Gene Expression and Characterization of the CmbR Regulon in Streptococcus pneumoniae

Overview of attention for article published in Frontiers in Microbiology, December 2016
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Title
Cysteine-Mediated Gene Expression and Characterization of the CmbR Regulon in Streptococcus pneumoniae
Published in
Frontiers in Microbiology, December 2016
DOI 10.3389/fmicb.2016.01929
Pubmed ID
Authors

Muhammad Afzal, Irfan Manzoor, Oscar P. Kuipers, Sulman Shafeeq

Abstract

In this study, we investigated the transcriptomic response of Streptococcus pneumoniae D39 to cysteine. Transcriptome comparison of the D39 wild-type grown at a restricted concentration of cysteine (0.03 mM) to one grown at a high concentration of cysteine (50 mM) in chemically-defined medium (CDM) revealed elevated expression of various genes/operons, i.e., spd-0150, metQ, spd-0431, metEF, gshT, spd-0618, fhs, tcyB, metB-csd, metA, spd-1898, yvdE, and cysK, likely to be involved in the transport and utilization of cysteine and/or methionine. Microarray-based data were further confirmed by quantitative RT-PCR. Promoter lacZ-fusion studies and quantitative RT-PCR data showed that the transcriptional regulator CmbR acts as a transcriptional repressor of spd-0150, metEF, gshT, spd-0618, tcyB, metA, and yvdE, putatively involved in cysteine uptake and utilization. The operator site of CmbR in the promoter regions of CmbR-regulated genes is predicted and confirmed by mutating or deleting CmbR operator sites from the promoter regions of these genes.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 17 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 17 100%

Demographic breakdown

Readers by professional status Count As %
Student > Bachelor 3 18%
Researcher 3 18%
Student > Master 3 18%
Professor 1 6%
Student > Ph. D. Student 1 6%
Other 0 0%
Unknown 6 35%
Readers by discipline Count As %
Agricultural and Biological Sciences 5 29%
Biochemistry, Genetics and Molecular Biology 3 18%
Immunology and Microbiology 1 6%
Social Sciences 1 6%
Unknown 7 41%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 20 December 2016.
All research outputs
#18,483,671
of 22,903,988 outputs
Outputs from Frontiers in Microbiology
#19,411
of 24,956 outputs
Outputs of similar age
#304,681
of 416,461 outputs
Outputs of similar age from Frontiers in Microbiology
#316
of 409 outputs
Altmetric has tracked 22,903,988 research outputs across all sources so far. This one is in the 11th percentile – i.e., 11% of other outputs scored the same or lower than it.
So far Altmetric has tracked 24,956 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 6.3. This one is in the 9th percentile – i.e., 9% of its peers scored the same or lower than it.
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We're also able to compare this research output to 409 others from the same source and published within six weeks on either side of this one. This one is in the 14th percentile – i.e., 14% of its contemporaries scored the same or lower than it.