phylogenetic

Researchers find missing genes of ancient organism

...uence. Nanoarchaeum equitans, is a member of a new phylogenetic kingdom in the Archaea containing organisms that are primitive, parasitic and extremophile, or notable for living in the most extreme environments. Surprisingly, Söll's team found that, although the genome of Nanoarchaeum lacks several intact tRNA g...

Oldest fossil human protein ever sequenced

...t and living species, and to better understand the phylogenetic relationships. ...

Venom doc tracks down snake bioweapons

...-venomous tissues, Fry was able to reconstruct the phylogenetic history of each snake venom constituent. He determined which protein family each toxin type belonged to, and based the normal expression pattern of that protein family, he predicted from which tissue type each toxin protein had been derived. Despite...

Map of life on Earth could be used on Mars

...r planets. Blank approaches the task by resolving phylogenetic trees. These trees, based upon genetic sequencing data, trace the genetic relationships between what we think of as primitive organisms through trait development. The relationships between early forms of life can illuminate the relationships between ...

Bioinformatics reveals new gene regulation system

...onov started their search using a technique called phylogenetic footprinting to review the upstream DNA sequences ...his, they used a bioinformatics approach they call phylogenetic profiling, compiling a list of genomes that clearly contained the NrdR-box and those that clearly di...

Discovery of an American salamander where it shouldn't be: Korea

...y performed anatomical comparisons and a molecular phylogenetic analysis to determine the relationship between the new salamander and other plethodontids. All these researches are coauthors of the current Nature paper, though Karsen elected not to join them in order to accept their offer to name it after him. T...

Carnegie Mellon University research reveals how cells process large genes

...ned these experimental data with computational and phylogenetic analyses of several fruitfly and other insect spec...rrect expression of large genes. Bioinformatic and phylogenetic analyses conducted by Lopez also indicate that recursive splicing plays a role in at least 124 fruit...

Reversal of role for a viral protein associated with the development of lymphoma

...ned these experimental data with computational and phylogenetic analyses of several fruitfly and other insect spec...rrect expression of large genes. Bioinformatic and phylogenetic analyses conducted by Lopez also indicate that recursive splicing plays a role in at least 124 fruit...

Ancient DNA confirms single origin of Malagasy primates

... conclusion to be drawn from our study is that the phylogenetic placement of subfossil lemurs adds additional support to the hypothesis that non-human primates colonized Madagascar only once," Yoder said. "However, the limited taxonomic success of our study leaves open the possibility that data from additional ta...

DNA traces evolution of extinct sabertooths and the American cheetah-like cat

... closely related to any living felid species. The phylogenetic tree drawn from the new data also shows that the American cheetah-like cat is genetically most closely related to the puma, rather than to the true African cheetah (Acinonyx jubatus). Miracinonyx and the true cheetah Acinonyx show remarkable morpholo...

Scientists narrow the time limits for the human and chimpanzee split

...ns, macaques, and others -- from the branch of the phylogenetic tree that led to humans and apes, which fossil studies have shown is at least 24 million years ago. Using this calibration time, the team estimated that the human-chimp divergence occurred at least 5 million years ago, proportionally about one-fifth...

Genetic and environmental influences on alcohol consumption among rhesus monkeys

...model for many human diseases due in part to their phylogenetic closeness," said Joseph G. Lorenz, research associate at the Coriell Institute for Medical Research and corresponding author for the study. "Also, like humans, they are highly social, which is important for diseases like alcoholism where there are s...

Study outlines genetic differences between potential pandemic influenza strains

... have two." Garten and her colleagues conducted a phylogenetic analysis of over 300 H5N1 virus samples taken from both avian and human sources from 2003 through the summer of 2005. They correlated the genetic makeup of viruses to the physical characteristics of viruses, including surface proteins and receptor s...

Methane-belching bugs inspire a new theory of the origin of life on Earth

...annual meeting earlier this week. "There is strong phylogenetic evidence that acetate kinase is a very ancient enzyme." No such evidence can pinpoint the age of Pta, "but these two enzymes always work together," suggesting that they evolved together. The two enzymes' primeval genetic provenance and the simplicity...

How did cactuses evolve?

...taining well-hydrated tissues." Recent molecular phylogenetic work has confirmed that Pereskia, a genus that con...porated physiological, ecological, anatomical, and phylogenetic data." ...

Biologists call for better choice of model organisms in 'evo-devo'

... the selection criteria deemed most crucial is the phylogenetic position of prospective model organisms, which ref...a guide to plug holes in unexplored regions of the phylogenetic tree, or as a pointer to species with presumed primitive (ancestral) characteristics. Drs Ronald ...

Genomics throws species definition in question for microbes

... Roberts. "Conflicts exist between phenotypic and phylogenetic information, the means for classifying non-cultured microbes are limited under the current paradigm, and microbial species do not always demonstrate the phenotypic or genetic cohesiveness expected of them. For these reasons and others it has become ...

Risk of HIV transmission highest early in infection

...clinics in Canada studied HIV transmission through phylogenetic analysis—essentially, drawing the virus’s family t...s found that 49 percent of early infections formed phylogenetic clusters—very close branches on the family tree. This indicated that a large portion of HIV acquisit...

Study of protein folds offers insight into metabolic evolution

... Their work relies on established techniques of phylogenetic analysis developed in the past decade to plot the ...Jay E. Mittenthal. "We are using the techniques of phylogenetic analysis that systematicists used to build the tree of life, and we are applying it to a biochemical...