BOL: Related items

04- Informatics Approach to Cancer - Interview with Dr. Joel Saltz

Mon, 07 Oct 2013 14:35:43 -0500

For additional information visit http://www.cancerquest.org/joel-saltz-interview. Dr. Joel Saltz is a Professor in the Departments of Pathology, Biostatistics and Bioinformatics, and Mathematics and Computer Science at Emory University. Dr. Saltz's research on bioinformatics spans several disciplines. One project involves applying computer analysis to medical imaging to yield better results for patients. As an example, a computer program may able to help doctors detect small cancers in a CT scan or mammogram. In this interview segment, Dr. Saltz discusses the informatics approach to cancer. To learn more about cancer and watch additional interviews, please visit the CancerQuest website at http://www.cancerquest.org.

Oldest Hominin DNA Sequenced

Surajeet — Fri, 27 Dec 2013 19:58:31 -0600

Matthias Meyer and his team from the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, have developed new techniques for retrieving and sequencing highly degraded ancient DNA. They then joined forces with Juan-Luis Arsuaga and applied the new techniques to a cave bear from the Sima de los Huesos site. After this success, the researchers sampled two grams of bone powder from a hominin thigh bone from the cave. They extracted its DNA and sequenced the genome of the mitochondria or mtDNA, a small part of the genome that is passed down along the maternal line and occurs in many copies per cell. The researchers then compared this ancient mitochondrial DNA with Neandertals, Denisovans, present-day humans, and apes.

From the missing mutations in the old DNA sequences the researchers calculated that the Sima hominin lived about 400,000 years ago. They also found that it shared a common ancestor with the Denisovans, an extinct archaic group from Asia related to the Neandertals, about 700,000 years ago. "The fact that the mtDNA of the Sima de los Huesos hominin shares a common ancestor with Denisovan rather than Neandertal mtDNAs is unexpected since its skeletal remains carry Neandertal-derived features," says Matthias Meyer. Considering their age and Neandertal-like features, the Sima hominins were likely related to the population ancestral to both Neandertals and Denisovans. Another possibility is that gene flow from yet another group of hominins brought the Denisova-like mtDNA into the Sima hominins or their ancestors.

Reference

http://www.sciencedaily.com/releases/2013/12/131204132018.htm

Method in Comparative genomics !!

Jit — Wed, 09 Nov 2016 16:29:24 -0600

We present methods for the automatic determination of genome correspondence. The algorithms enabled the automatic identification of orthologs for more than 90% of genes and intergenic regions across the four species despite the large number of duplicated genes in the yeast genome. The remaining ambiguities in the gene correspondence revealed recent gene family expansions in regions of rapid genomic change.

We present methods for the identification of protein-coding genes based on their patterns of nucleotide conservation across related species. We observed the pressure to conserve the reading frame of functional proteins and developed a test for gene identification with high sensitivity and specificity. We used this test to revisit the genome of S. cerevisiae, reducing the overall gene count by 500 genes (10% of previously annotated genes) and refining the gene structure of hundreds of genes. We present novel methods for the systematic de novo identification of regulatory motifs. The methods do not rely on previous knowledge of gene function and in that way differ from the current literature on computational motif discovery. Based on the genome-wide conservation patterns of known motifs, we developed three conservation criteria that we used to discover novel motifs. We used an enumeration approach to select strongly conserved motif cores, which we extended and collapsed into a small number of candidate regulatory motifs. These include most previously known regulatory motifs as well as several noteworthy novel motifs. The majority of discovered motifs are enriched in functionally related genes, allowing us to infer a candidate function for novel motifs.

Our results demonstrate the power of comparative genomics to further our understanding of any species. Our methods are validated by the extensive experimental knowledge in yeast, and will be invaluable in the study of complex genomes like that of human.

Address of the bookmark: http://web.mit.edu/manoli/www/publications/Kellis_JCB_04.pdf

The Sheppard Lab

Fri, 09 Aug 2024 02:48:34 -0500

Ineos Oxford Institute of Antimicrobial Research – Department of Biology – University of Oxford

Our research centres on the use of genetics/genomics and phenotypic studies to address complex questions in the ecology, epidemiology and evolution of microbes. Our most recent interest focuses upon comparative genome analysis to describe the core and flexible genome of pathogenic bacteria (Campylobacter, Acinetobacter, Escherichia coli, Helicobacter, Staphylococcus and Streptococcus suis) and how this is related to population genetic structuring, the maintenance of species, and the evolution of host/niche adaptation and virulence.

More at https://sheppardlab.com/research/

CBS Comparative Microbial Genomics group - BioTools download page

Neel — Wed, 22 Aug 2018 21:59:41 -0500

he CMG-biotools system presents a stand-alone interface for comparative microbial genomics. The package is a customized operating system, based on Xubuntu 10.10, available through the open source Ubuntu project. The system can be installed on a virtual computer, allowing the user to run the system alongside any other operating system. Source codes for all programs are provided under GNU license, which makes it possible to transfer the programs to other systems if so desired. We here demonstrate the package by comparing and analyzing the diversity within the class Negativicutes, represented by 31 genomes including 10 genera. The analyses include 16S rRNA phylogeny, basic DNA and codon statistics, proteome comparisons using BLAST and graphical analyses of DNA structures.

Paper: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0060120

Address of the bookmark: http://www.cbs.dtu.dk/biotools/CMGtools/

Postdoc in Genomics of Pipefishes and Seahorses at NSF-funded postdoctoral project in Adam Jones' Lab

Thu, 07 Jan 2021 21:22:24 -0600

An NSF-funded postdoctoral position is available in Adam Jones' Lab
at the University of Idaho to study the evolution and development of
the male's brood pouch in syngnathid fishes (seahorses, pipefishes
and seadragons). The project is being conducted in collaboration
with Dr. William Cresko's group at the University of Oregon. The
postdoc will be involved in studies of comparative genomics across
the family Syngnathidae, investigations of brood pouch morphology, and
characterization of the brood pouch microbiome. The position will be
funded for two years, with the possibility of a third year. The postdoc
will be based at the University of Idaho and will interact extensively
with the Cresko Lab at the University of Oregon.

The University of Idaho is in Moscow, a small college town located in
Northern Idaho on the Washington border. Moscow is widely considered to
be a great place to live, and it's known for a pleasant downtown, active
farmer's market, and nearby recreational opportunities. All of Moscow
is within biking or walking distance of the University of Idaho. For
more information about Moscow, see https://visitmoscowid.com/.

The University of Idaho has very strong faculty in evolution and
genomics in multiple departments and interdisciplinary programs. Of
particular note are the Bioinformatics and Computational Biology
Program (BCB: https://www.uidaho.edu/sci/bcb/people/faculty) and
the Institute for Bioinformatics and Evolutionary Studies (IBEST:
https://www.ibest.uidaho.edu/index.php). In addition, the University of
Idaho is only eight miles from Washington State University in Pullman, and
faculty from the two institutions interact and collaborate extensively.

Minimum qualifications include: a Ph.D. in biological sciences,
bioinformatics, or a related discipline; experience conducting research
in genomics or evolutionary biology, as evidenced by publications
in peer-reviewed journals; and evidence of strong written and oral
communication skills. Experience analyzing next-generation sequence
data and familiarity with the genomics of marine fishes are desirable
but not required.

Apply at: https://uidaho.peopleadmin.com/postings/30003

Review of applications will begin January 15, 2021. The start date
is flexible.

The University of Idaho is an equal opportunity/Affirmative Action/equal
access employer.

Informal inquiries are encouraged and can be directed to Adam Jones
(adamjones@uidaho.edu).

"adamjones@uidaho.edu"

Comparative Genomics Workshops !

Rahul Nayak — Tue, 25 Jan 2022 20:39:58 -0600

This meeting's objective was to obtain a big picture look at the current state of the field of comparative genomics with a focus on commonalities across genomic investigations into humans, model organisms (both traditional and non-traditional), agricultural species, wildlife species and microbes.

https://www.genome.gov/event-calendar/perspectives-in-comparative-genomics-and-evolution

Address of the bookmark: https://www.genome.gov/event-calendar/perspectives-in-comparative-genomics-and-evolution

phyloXML: XML for evolutionary biology and comparative genomics

Jit — Wed, 29 Nov 2017 10:04:48 -0600

phyloXML (example) is an XML language designed to describe phylogenetic trees (or networks) and associated data. PhyloXML provides elements for commonly used features, such as taxonomic information, gene names and identifiers, branch lengths, support values, and gene duplication and speciation events. Using these standardized elements allows interoperability between various applications and databases. Furthermore, both due to extensible nature of XML itself and the provision of elements by phyloXML, extensibility as well as domain specific applications are ensured. The structure of phyloXML is described by XML Schema Definition (XSD) language.

Address of the bookmark: http://www.phyloxml.org/

phyloXML: XML for evolutionary biology and comparative genomics

Jit — Sun, 08 Dec 2019 09:41:18 -0600

http://www.phyloxml.org/archaeopteryx-js/adh.html

Address of the bookmark: http://www.phyloxml.org/

Sibelia: A comparative genomics tool

BioStar — Sat, 22 Aug 2020 02:49:00 -0500

Sibelia: A comparative genomics tool: It assists biologists in analysing the genomic variations that correlate with pathogens, or the genomic changes that help microorganisms adapt in different environments. Sibelia will also be helpful for the evolutionary and genome rearrangement studies for multiple strains of microorganisms.

Sibelia is useful in finding: (1) shared regions, (2) regions that present in one group of genomes but not in others, (3) rearrangements that transform one genome to other genomes.

More at http://bioinf.spbau.ru/sibelia

Sibelia docs http://gensoft.pasteur.fr/docs/Sibelia/3.0.7/SIBELIA.md

Address of the bookmark: https://github.com/bioinf/Sibelia