Displaying posts tagged with

“metagenomics”

Lake Arrowhead Microbial Genomics Conference

Quick post: at the Lake Arrowhead Microbial Genomics Conference. I’m a bad microblogger, but thankfully Jonathan Eisen and Ruchira Datta are doing a great job of covering this conference live. There is a friendfeed room. The Twitter hashtag is #LAMG10.  The science, people, food and location are all great. My student, David Ream, is presenting [...]

Obesity: the role of the immune system

Obesity is one symptom of several, which together constitute what is now termed metabolic syndrome. Morbid obesity is also associated with a host of other symptoms including high blood sugar, high blood lipids, insulin resistance  and liver disorders. The root causes of which are traced back to excessive food consumption, reduced physical activity and in [...]

I never metagenomics I didn’t like

“Let another man praise thee, and not thine own mouth; a stranger, and not thine own lips.” — Proverbs 27:2 “What-ever” –  Me In PLoS Computational Biology this week, a trio of researchers provides a review of the challenges that metagenomics might ― and already do ― pose for bioinformaticians. The authors refer to metagenomic [...]

A sh*tload of data

There are more microbial cells in our body than our own. Those microbes are not just passive hitchhikers or conversely, malicious agents of disease. They affect our well-being and health in a much broader spectrum than simply “bad” or “passive”. Among other things our gut microbes play an important role in digestion, have been linked [...]

Photosynthesis, phages and structures: there’s treasure everywhere!

Here’s a really cool work, published this September in Nature.. Why did I choose this work?  Well, it’s a major discovery, and it’s all done using bioinformatics, and fairly simple bioinformatics at that. The power of metagenomics and bioinfromatics: in a mass of data you just have to know what you are looking for, and [...]

The medium-rare biosphere

All the roots hang down Swing from town to town They are marching around Down under your boots All the trucks unload Beyond the gopher holes There’s a world going on Underground — Tom Waits, “Underground” Our picture of the microbial biosphere is heavily skewed towards what we can see, culture, and are interested in. [...]

The Craigslist of Antibiotic Resistance

(Before we get going: this the the 100th post on Byte Size Biology. Happy Birthday to me!) Resistance to antibiotics is a huge clinical problem. In the US, more people die of  methicillin-resistant Staphylococcus aureus (MRSA) infections (nearly 19,000 in 2006) than of AIDS (14,627).  We know that antibiotic resistance is carried on mobile genetic [...]

Absolut standards: report from the M3-2009 meeting, part 2: signature genes and big science

Some more presentations from the metagenomics, metadata, and metaanalysis (M3) meeting, Stockholm June 27, 2009 Pathway Signature Genes Lucas A. Brouwers, Martijn A. Huynen and Bas E. Dutilh CMBI / NCMLS, Radboud University Nijmegen Medical Centre, The Netherlands If we take a sample of soil, how can we know whether it is adequate for growing [...]

Skin Flick 2: Statistic Boogaloo

Reports on the first metagenomic survey of skin bacteria (see my previous post) did not go unnoticed by the popular media. Reports appear in US News & world Report, LA Times, Times of India, National Geographic, and Scientific American. All these articles have one thing in common: they are wrong. Yes, even Scientific American. All [...]

Skin flick

Interesting report in Science today about the human skin metagenome. The skin is a fairly large organ, and it is home to an estimated 1012 bacteria. It is the first barrier our body poses against pathogens, toxins, and sarcastic comments.  An adult’s skin area is about 2m2, virtually all of it exposed to the outside [...]

Challenges with Data Quality, Sharing, and Versioning in Next-Generation Sequencing

An fine talk by David Dooling highlighting  some of the false impressions about second generation sequencing. A partial list: Why sequencing quality trump base pair output Why genomes are really probabilities rather than strings Why centralized repositories break down when it comes to second generation sequencing data. Collaborative Software development and versioning has been moving [...]

Metagenomes as a diagnostic tool?

Can we learn about an environment by looking at the bacteria living in it? Can we sequence a metagenome, and then say: ”according to the active genes in this water sample it appears to be too rich in metal ions / sewage products / other pollutants” ? In the foreseeable future could we sequence a [...]

Every Man an Island, Pt. 2

(Continued from  part 1) Why we are islands In the previous post we have seen how  our bacterial population affects  our weight  and that by changing our dietary habits we can change the species composition in our guts. Also, we saw how a metagenomic analysis can lead to verifiable hypotheses: using a metagenomic analysis, Gordon’s [...]