The common ancestor of species was rod-shaped

November 16, 2018

There are two major shapes of bacteria, i.e., rod-shape and spherical shape. The genus Deinococcus consists of rod-shape and spherical shape species. The authors determined whether the common ancestor of Deinococcus was rod-shape or spherical.

The rod-shaped related proteins (MreB, MreC, MreD, MrdA, RodA, and RodZ)?have been identified. We compared the homologs of those proteins in various Deinococcus species and Thermus thermophilus. The evolutionary relationships among the Deinococcus species used in this study were shown by using comparison of their all ribosomal protein sequences.

D. actinosclerus, D. deserti, D. peraridilitoris, and D. puniceus had all the six rod-shape related genes. Homologs of mreC, mreD, and mrdA formed a conserved gene cluster, which were also conserved in T. thermophilus. Thus, although mrdA and rodA were found to be clustered in Escherichia coli, mrdA homolog was not clustered with rodA homolog in Deinococcus and T. thermophilus. Although mreB, mreC, and mreD were found clustered in E. coli, homologs of mreB, rodA, and rodZ were scattered in the genome of all the Deinococcus species.

Phylogenetic relationships inferred on the basis of rod-shape related genes showed that D. maricopensis and D. peraridilitoris had diverged prior to the separation of other Deinococcus species, which is in agreement with the evolution of Deinococcus species (phylogenetic relationships inferred from the ribosomal protein sequence comparison). The phylogenetic analyses indicated that major gene loss of the rod-shape related genes had occurred four times during the evolution of Deinococcus, which led to the generation of spherical shape species in the genus Deinococcus.

Our findings showed that each of the rod-shaped related genes had been inherited in most of rod-shaped species of Deinococcus during the evolution of Deinococcus species. Thus, the common ancestor of Deinococcus species was rod shaped.
For More information about this article, please visit

Reference: Morita Yusuke, et al. The Common Ancestor of Species was Rod-Shaped. The Open Bioinformatics Journal, 2018, DOI: 10.2174/1875036201811010252

Bentham Science Publishers

Related Evolution Articles from Brightsurf:

Seeing evolution happening before your eyes
Researchers from the European Molecular Biology Laboratory in Heidelberg established an automated pipeline to create mutations in genomic enhancers that let them watch evolution unfold before their eyes.

A timeline on the evolution of reptiles
A statistical analysis of that vast database is helping scientists better understand the evolution of these cold-blooded vertebrates by contradicting a widely held theory that major transitions in evolution always happened in big, quick (geologically speaking) bursts, triggered by major environmental shifts.

Looking at evolution's genealogy from home
Evolution leaves its traces in particular in genomes. A team headed by Dr.

How boundaries become bridges in evolution
The mechanisms that make organisms locally fit and those responsible for change are distinct and occur sequentially in evolution.

Genome evolution goes digital
Dr. Alan Herbert from InsideOutBio describes ground-breaking research in a paper published online by Royal Society Open Science.

Paleontology: Experiments in evolution
A new find from Patagonia sheds light on the evolution of large predatory dinosaurs.

A window into evolution
The C4 cycle supercharges photosynthesis and evolved independently more than 62 times.

Is evolution predictable?
An international team of scientists working with Heliconius butterflies at the Smithsonian Tropical Research Institute (STRI) in Panama was faced with a mystery: how do pairs of unrelated butterflies from Peru to Costa Rica evolve nearly the same wing-color patterns over and over again?

Predicting evolution
A new method of 're-barcoding' DNA allows scientists to track rapid evolution in yeast.

Insect evolution: Insect evolution
Scientists at Ludwig-Maximilians-Universitaet (LMU) in Munich have shown that the incidence of midge and fly larvae in amber is far higher than previously thought.

Read More: Evolution News and Evolution Current Events is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to