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Bacillus safensis FO-36b and Bacillus pumilus SAFR-032: a whole genome comparison of two spacecraft assembly facility isolates

Overview of attention for article published in BMC Microbiology, June 2018
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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • One of the highest-scoring outputs from this source (#2 of 2,147)
  • High Attention Score compared to outputs of the same age (97th percentile)

Mentioned by

15 news outlets
12 tweeters
1 Facebook page
2 Google+ users


3 Dimensions

Readers on

24 Mendeley
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Bacillus safensis FO-36b and Bacillus pumilus SAFR-032: a whole genome comparison of two spacecraft assembly facility isolates
Published in
BMC Microbiology, June 2018
DOI 10.1186/s12866-018-1191-y
Pubmed ID

Madhan R. Tirumalai, Victor G. Stepanov, Andrea Wünsche, Saied Montazari, Racquel O. Gonzalez, Kasturi Venkateswaran, George E. Fox


Bacillus strains producing highly resistant spores have been isolated from cleanrooms and space craft assembly facilities. Organisms that can survive such conditions merit planetary protection concern and if that resistance can be transferred to other organisms, a health concern too. To further efforts to understand these resistances, the complete genome of Bacillus safensis strain FO-36b, which produces spores resistant to peroxide and radiation was determined. The genome was compared to the complete genome of B. pumilus SAFR-032, and the draft genomes of B. safensis JPL-MERTA-8-2 and the type strain B. pumilus ATCC7061T. Additional comparisons were made to 61 draft genomes that have been mostly identified as strains of B. pumilus or B. safensis. The FO-36b gene order is essentially the same as that in SAFR-032 and other B. pumilus strains. The annotated genome has 3850 open reading frames and 40 noncoding RNAs and riboswitches. Of these, 307 are not shared by SAFR-032, and 65 are also not shared by MERTA and ATCC7061T. The FO-36b genome has ten unique open reading frames and two phage-like regions, homologous to the Bacillus bacteriophage SPP1 and Brevibacillus phage Jimmer1. Differing remnants of the Jimmer1 phage are found in essentially all B. safensis / B. pumilus strains. Seven unique genes are part of these phage elements. Whole Genome Phylogenetic Analysis of the B. pumilus, B. safensis and other Firmicutes genomes, separate them into three distinct clusters. Two clusters are subgroups of B. pumilus while one houses all the B. safensis strains. The Genome-genome distance analysis and a phylogenetic analysis of gyrA sequences corroborated these results. It is not immediately obvious that the presence or absence of any specific gene or combination of genes is responsible for the variations in resistance seen. It is quite possible that distinctions in gene regulation can alter the expression levels of key proteins thereby changing the organism's resistance properties without gain or loss of a particular gene. What is clear is that phage elements contribute significantly to genome variability. Multiple genome comparison indicates that many strains named as B. pumilus likely belong to the B. safensis group.

Twitter Demographics

The data shown below were collected from the profiles of 12 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 24 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 24 100%

Demographic breakdown

Readers by professional status Count As %
Researcher 5 21%
Student > Bachelor 5 21%
Student > Ph. D. Student 4 17%
Student > Doctoral Student 3 13%
Student > Master 3 13%
Other 1 4%
Unknown 3 13%
Readers by discipline Count As %
Biochemistry, Genetics and Molecular Biology 8 33%
Agricultural and Biological Sciences 6 25%
Immunology and Microbiology 4 17%
Environmental Science 1 4%
Unknown 5 21%

Attention Score in Context

This research output has an Altmetric Attention Score of 113. 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 18 August 2019.
All research outputs
of 14,322,164 outputs
Outputs from BMC Microbiology
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Outputs of similar age
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Outputs of similar age from BMC Microbiology
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Altmetric has tracked 14,322,164 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 98th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 2,147 research outputs from this source. They receive a mean Attention Score of 3.8. This one has done particularly well, scoring higher than 99% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 276,096 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 97% of its contemporaries.
We're also able to compare this research output to 1 others from the same source and published within six weeks on either side of this one. This one has scored higher than all of them