Microbiome Digest, October 29, 2014

The genome of Mycoplasma Mnola, helminths in wild rats, fungi in strawberry roots, and the top 100 most cited papers of all time. Can you guess which one is #1?

Human genital microbiome

An Emerging Mycoplasma Associated with Trichomoniasis, Vaginal Infection and Disease – Jennifer M. Fettweis – PLOS ONE

“In this study, the mycoplasma was found almost exclusively in women infected with the sexually transmitted pathogen Trichomonas vaginalis, but rarely observed in women with no diagnosed disease.”

Human gut microbiome

Bacteriology and Changes in Antibiotic Susceptibility in Adults with Community-Acquired Perforated Appendicitis – Hong Gil Jeon – PLOS ONE

“We retrospectively reviewed records of adult patients diagnosed with perforated appendicitis at an 800-bed teaching hospital between January 2000 and December 2011. “

Animal microbiome

Changes in the intestinal bacterial community during the growth of white shrimp, Litopenaeus vannamei – Zhaobin Huang – Aquaculture Research

“In this study, we documented the changes in the intestinal bacterial community at four stages in Litopenaeus vannamei…, using 454 pyrosequencing techniques. “

Assessment of Helminth Biodiversity in Wild Rats Using 18S rDNA Based Metagenomics – Ryusei Tanaka – PLOS ONE

“In this study, we assessed parasite diversity in wild rats using 18S rDNA-based metagenomics. 18S rDNA PCR products were sequenced using an Illumina MiSeq sequencer and the analysis of the sequences using the QIIME software successfully classified them into several parasite groups.”

Soil microbiome

Linking soil microbial communities to vascular plant abundance along a climate gradient – Luca Bragazza – New Phytologist

“Microbial community structure and function were measured seasonally in four peatlands located along an altitude gradient representing a natural gradient of climate and associated vascular plant abundance.”

* Influence of Soil Type, Cultivar and Verticillium dahliae on the Structure of the Root and Rhizosphere Soil Fungal Microbiome of Strawberry – Srivathsa Nallanchakravarthula – PLOS ONE

“In this study we examined the effects of different soils and cultivars, and the presence of a soil-borne fungal pathogen, Verticillium dahliae, on the fungal microbiome of the rhizosphere soil and roots of strawberry plants, using high-throughput pyrosequencing.”

Metagenomics / Bioinformatics

Evaluation of a Hybrid Approach Using UBLAST and BLASTX for Metagenomic Sequences Annotation of Specific Functional Genes – Ying Yang – PLOS ONE

“A hybrid annotation pipeline proposed previously for taxonomic assignments was evaluated in this study for metagenomic sequences annotation of specific functional genes, such as antibiotic resistance genes, arsenic resistance genes and key genes in nitrogen metabolism. “

Metabolomics

Long-term phenotypic evolution of bacteria – Germán Plata – Nature

“Here we perform a comparative analysis of bacterial growth and gene deletion phenotypes using hundreds of genome-scale metabolic models. “

Phages and viruses

Conditional tolerance of temperate phages via transcription-dependent CRISPR-Cas targeting – Gregory W. Goldberg – Nature

“Here we show that the Staphylococcus epidermidis CRISPR-Cas system can prevent lytic infection but tolerate lysogenization by temperate phages. “

Science, publishing and career

The top 100 papers – Richard Van Noorden – Nature

“To mark the anniversary, Nature asked Thomson Reuters, which now owns the SCI, to list the 100 most highly cited papers of all time.”

Bibliometrics: Is your most cited work your best? – John P. A. Ioannidis – Nature

“John P. A. Ioannidis and colleagues asked the most highly cited biomedical scientists to score their top-ten papers in six ways.”

Recommendations for the Role of Publishers in Access to Data – Jennifer Lin, Carly Strasser – PLOS Biology

“As appeals for public access of research data continue to proliferate, many scholarly publishers—alongside funders, institutions, and libraries—are expanding their role to address this need. “

How to Make More Published Research True – John P. A. Ioannidis – PLOS ONE

“Currently, many published research findings are false or exaggerated, and an estimated 85% of research resources are wasted.”

Prominent Geomicrobiologist Dies – Tracy Vence – The Scientist

“Katrina Edwards, whose research focus was on discovering life beneath the ocean floor, has passed away at age 46.”

Bik’s Picks

The Art of Science: Popsicles Go Viral – The Finch and Pea

“Lick a virus? Probably not a good idea, unless it’s a Dangerous Popsicle, a sweet treat created by artist and designer Wei Li. “

Dozens of genes associated with autism in new research – Science Direct

“Two major genetic studies of autism, involving more than 50 laboratories worldwide, have newly implicated dozens of genes in the disorder. “

Antares Rocket Explosion Destroyed These Kids’ Science Projects – Rheana Murray – ABC News

“Students across the nation watched their science projects go up in flames as the rocket bound for the International Space Station exploded moments after takeoff.”

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General microbiology and science, June 27

Viruses in primate genomes, viruses altering shrimp metabolome, transposable elements and repeats, dengue, other infectious diseases in developing countries and Dr. Bik’s Picks.

Metagenomics / viruses

Screen Shot 2014-06-27 at 9.21.29 PMCute animal alert! A tarsier is a tiny primate with huge eyes.
The First Endogenous Herpesvirus, Identified in the Tarsier Genome, and Novel Sequences from Primate Rhadinoviruses and Lymphocryptoviruses – Amr Aswad, Aris Katzourakis – PLOS Genetics

“We describe the first endogenous herpesvirus from the genome of the Philippine tarsier, belonging to the Roseolovirus genus, and characterize its highly defective genome that is integrated and flanked by unambiguous host DNA. From a draft assembly of the aye-aye genome, we use bioinformatic tools to reveal over 100,000 bp of a novel rhadinovirus that is the first lemur gammaherpesvirus, closely related to Kaposi’s sarcoma-associated virus.”

 Metabolomics

Screen Shot 2014-06-27 at 9.32.37 PMAn Invertebrate Warburg Effect: A Shrimp Virus Achieves Successful Replication by Altering the Host Metabolome via the PI3K-Akt-mTOR Pathway – Mei-An Su – PLOS Pathogens

“We show that the PI3K-Akt-mTOR pathway was of central importance in triggering this WSSV-induced Warburg effect. Although dsRNA silencing of the mTORC1 activator Rheb had only a relatively minor impact on WSSV replication, in vivo chemical inhibition of Akt, mTORC1 and mTORC2 suppressed the WSSV-induced Warburg effect and reduced both WSSV gene expression and viral genome replication.”

Biofilms

Screen Shot 2014-06-27 at 9.33.21 PMFilaments in curved streamlines: rapid formation of Staphylococcus aureus biofilm streamers – Minyoung Kevin Kim – New Journal of Physics

“We discovered that S. aureus rapidly forms flow-induced, filamentous biofilm streamers, and furthermore if surfaces are coated with human blood plasma, streamers appear within minutes and clog the channels more rapidly than if the channels are uncoated. “

Chromosomal organization

Screen Shot 2014-06-27 at 9.34.04 PMDigital Genotyping of Macrosatellites and Multicopy Genes Reveals Novel Biological Functions Associated with Copy Number Variation of Large Tandem Repeats – Manisha Brahmachary – PLOS Genetics

“Here, we demonstrate the utility of Nanostring technology as a targeted approach to perform accurate measurement of tandem repeats even at extremely high copy number, and apply this technology to genotype 165 HapMap samples from three different populations and five species of non-human primates. “

Screen Shot 2014-06-27 at 9.34.37 PMLarge-Scale Genomic Analysis Suggests a Neutral Punctuated Dynamics of Transposable Elements in Bacterial Genomes – Jaime Iranzo – PLOS Computational Biology

“In this work, we take advantage of the large amount of genomic data currently available and study the abundance distributions of 33 IS families in 1811 bacterial chromosomes. This allows us to test simple models of IS dynamics and estimate their key parameters by means of a maximum likelihood approach. “

Microbial Ecology

Screen Shot 2014-06-27 at 9.35.00 PMEx Uno Plures: Clonal Reinforcement Drives Evolution of a Simple Microbial Community – Margie Kinnersley – PLOS Genetics

“We previously showed that a population of E. coli that originated from a single clone and was cultured in the presence of a single limiting resource, evolves into a stable, three-membered community, wherein one clone excretes metabolites that the others utilize as carbon sources. To discern the genetic factors at work in producing this outcome and to illuminate the community’s physiology, we sequenced the genomes of the ancestral and evolved clones.”

Infectious diseases in developing countries

Screen Shot 2014-06-27 at 9.35.43 PMExploring the Relationship between Access to Water, Sanitation and Hygiene and Soil-Transmitted Helminth Infection: A Demonstration of Two Recursive Partitioning Tools – Katherine Gass – PLOS Neglected Tropical Diseases

“Improvements to water, sanitation and hygiene (WASH) likely provide sustained benefit, but few rigorous studies have evaluated the specific WASH components most influential in reducing infection. “

Screen Shot 2014-06-27 at 9.36.14 PMSocial Sciences Research on Infectious Diseases of Poverty: Too Little and Too Late? – José Azoh Barry – PLOS Neglected Tropical Diseases

“Besides the vicious circle these diseases maintain with dire conditions of poverty, an increased microbial resistance to some therapeutic drugs adds to the complexity of health disparities and human suffering among the socially disadvantaged, marginalized, and prejudiced against.”

Dengue

Screen Shot 2014-06-27 at 9.36.37 PMVariability in Dengue Titer Estimates from Plaque Reduction Neutralization Tests Poses a Challenge to Epidemiological Studies and Vaccine Development – Henrik Salje – PLOS Neglected Tropical Diseases

“We used repeated assays on the same two pools of serum using five different viruses (2,319 assays) to characterize the variability in the technique under identical experimental conditions. We also assessed the performance of multiple statistical models to interpolate continuous values of neutralization titer from discrete measurements from serial dilutions.”

Science and career

PLOSTen Simple Rules for Approaching a New Job – Philip E. Bourne – PLOS Computational Biology

“Thinking both as a job applicant and a job interviewer about how I have approached job situations over the years before, during, and after the interview and how those situations have turned out, I can offer the following ten simple rules as you prepare.”

A New Online Computational Biology Curriculum – David B. Searls – PLOS Computational Biology

“A recent proliferation of Massive Open Online Courses (MOOCs) and other web-based educational resources has greatly increased the potential for effective self-study in many fields. This article introduces a catalog of several hundred free video courses of potential interest to those wishing to expand their knowledge of bioinformatics and computational biology. “

Arsenic metabolism

Screen Shot 2014-06-27 at 10.00.06 PMAssociations between Arsenic Species in Exfoliated Urothelial Cells and Prevalence of Diabetes among Residents of Chihuahua, Mexico – Jenna M. Currier – Environ Health Perspect

“We measured concentrations of trivalent and pentavalent iAs, methyl-As (MAs), and dimethyl-As (DMAs) species in EUC from 374 residents of Chihuahua, Mexico, who were exposed to iAs in drinking water.”

Dr. Bik’s Picks

Screen Shot 2014-06-27 at 10.09.01 PMWith pictures and videos: Duration of urination does not change with body size – Patricia J. Yang – PNAS

“In this study, we report a mathematical model that clarifies misconceptions in urology and unifies the results from 41 independent urological and anatomical studies. The theoretical framework presented may be extended to study fluid ejection from animals, a universal phenomenon that has received little attention.”

Screen Shot 2014-06-27 at 10.01.44 PMFrom Gemstones to Arsenic: How the Development of Pigment Colored Art – Allison Meier

“A new exhibition at London’s National Gallery — Making Colour — looks at the development of color in art, from the Middle Ages to 1900. “

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