A5084075002- Protist diversity and phylogeny
- Microbial Community Ecology and Physiology
- Genomics and Phylogenetic Studies
- Gamma-ray bursts and supernovae
- Methane Hydrates and Related Phenomena
- Pulsars and Gravitational Waves Research
- Enzyme-mediated dye degradation
- Wastewater Treatment and Nitrogen Removal
- Insect symbiosis and bacterial influences
- Chromium effects and bioremediation
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Astrophysical Phenomena and Observations
- Wildlife Ecology and Conservation
- Parasite Biology and Host Interactions
- Environmental DNA in Biodiversity Studies
- Tannin, Tannase and Anticancer Activities
- Astrophysics and Cosmic Phenomena
- Water Treatment and Disinfection
- Microbial bioremediation and biosurfactants
- Particle Accelerators and Free-Electron Lasers
- Planarian Biology and Electrostimulation
- Fire effects on ecosystems
- Astronomical Observations and Instrumentation
- Particle accelerators and beam dynamics
University of Pisa
2016-2025
Weatherford College
2023
University of Trento
2010
Technical University of Munich
2000-2007
Istituto Sperimentale per la Zoologia Agraria
2006
Austrian Academy of Sciences
2005
Igenbio (United States)
2002
University of Washington
2002
Icahn School of Medicine at Mount Sinai
1983
Current sampling of genomic sequence data from eukaryotes is relatively poor, biased, and inadequate to address important questions about their biology, evolution, ecology; this Community Page describes a resource 700 transcriptomes marine microbial help understand role in the world's oceans.
The prevailing view of the nuclear genetic code is that it largely frozen and unambiguous. Flexibility in has been demonstrated ciliates reassign standard stop codons to amino acids, resulting seven variant codes, including three previously undescribed ones reported here. Surprisingly, two these species, we find efficient translation all 64 as acids recognition either one or codons. How, therefore, does machinery interpret a "stop" codon? We provide evidence, based on ribosomal profiling...
Microtubules play crucial roles in cytokinesis, transport, and motility, are therefore superb targets for anti-cancer drugs. All tubulins evolved from a common ancestor they share with the distantly related bacterial cell division protein FtsZ, but while eukaryotic into highly conserved microtubule-forming heterodimers, FtsZ presumably continued to function as single homopolymeric protofilaments it does today. have not previously been found bacteria, we lack insight their evolution...
ABSTRACT “ Candidatus Midichloria mitochondrii” is an intramitochondrial bacterium of the order Rickettsiales associated with sheep tick Ixodes ricinus . Bacteria phylogenetically related to Ca (midichloria and like organisms [MALOs]) have been shown be a wide range hosts, from amoebae variety animals, including humans. Despite numerous studies focused on specific members MALO group, no comprehensive phylogenetic statistical analyses so far performed group as whole. Here, we present...
ABSTRACT In the past 10 years, number of endosymbionts described within bacterial order Rickettsiales has constantly grown. Since 2006, 18 novel genera inhabiting protists, such as ciliates and amoebae, have been described. this work, we characterize two from Paramecium collected near Bloomington, IN. Both endosymbiotic species inhabit cytoplasm same host. The Gram-negative bacterium “ Candidatus Bealeia paramacronuclearis” occurs in clumps is frequently associated with host macronucleus....
Tubulins, the protein constituents of microtubule cytoskeleton, are present in all known eukaryotes but have never been found Bacteria or Archaea. Here we report presence two tubulin-like genes [bacterial tubulin a ( btuba ) and bacterial b btubb )] bacteria genus Prosthecobacter (Division Verrucomicrobia). In this study, investigated organization expression these conducted comparative analysis eukaryotic sequences, focusing on their phylogeny 3D structures. The arranged as adjacent loci...
ABSTRACT In the past, studies on relationships of bacterial phyla Planctomycetes , Chlamydiae Lentisphaerae and Verrucomicrobia using different phylogenetic markers have been controversial. Investigations based 16S rRNA sequence analyses suggested a relationship four phyla, showing branching order / . Phylogenetic 23S genes in this study also support monophyletic grouping their order—this is significant for understanding cell division, since major division protein FtsZ absent from members...
Journal Article Anatomical mapping of epidermal Langerhans cell densities in adults Get access B. BERMAN, BERMAN Department Dermatology, Mount Sinai School Medicine, New York, York 10029, U. S. A. Dr Brian Berman, Dermatology Service, V. Medical Center, 150 Muir Road, Martinez, CA 94553, Search for other works by this author on: Oxford Academic Google Scholar L. CHEN, CHEN D. FRANCE, FRANCE W. I. DOTZ, DOTZ G. PETRONI British Volume 109, Issue 5, 1 November 1983, Pages 553–558,...
Background The bacterial taxon Polynucleobacter necessarius subspecies asymbioticus represents a group of planktonic freshwater bacteria with cosmopolitan and ubiquitous distribution in standing habitats. These comprise <1% to 70% (on average about 20%) total bacterioplankton cells various ubiquity this was recently explained by intra-taxon ecological diversification, i.e. specialization lineages specific environmental conditions; however, details on adaptations are not known. Here we...
"Neglected Rickettsiaceae" (i.e. those harboured by non-hematophagous eukaryotic hosts) display greater phylogenetic variability and more widespread dispersal than pathogenic ones; yet, the knowledge about their actual host range shift mechanism is scarce. The present work reports characterization following full-cycle rRNA approach (SSU sequence, specific in situ hybridization, ultrastructure) of a novel rickettsial bacterium, herewith proposed as 'Candidatus Megaira polyxenophila' gen....
Demands for renewable and sustainable biopolymers have rapidly increased in the last decades along with environmental issues. In this context, bacterial cellulose, as biodegradable biopolymer has received considerable attention. Particularly, acetic acid bacteria of Komagataeibacter xylinus species can produce cellulose from several carbon sources. To fully exploit metabolic potential producing bacteria, an understanding ability different sources characterization genes involved synthesis is...
The order Rickettsiales (Alphaproteobacteria) encompasses multiple diverse lineages of host-associated bacteria, including pathogens, reproductive manipulators, and mutualists. Here, in to understand how intracellularity host association originated this order, whether they are ancestral or convergently evolved characteristics, we built a large phylogenetically-balanced dataset that includes de novo sequenced genomes selection published genomic metagenomic assemblies. We perform detailed...
Epixenosomes, ectosymbionts on hypotrich ciliates (genus Euplotidium ) defend their host against the ciliate predator Litonotus lamella. Although here only itoi and arenarium from tide pools along a rocky shore near Leghorn (Ligurian sea) were studied in detail, these epibionts are certainly present specimens of E. other species similar north coastal habitats. The complex life history epixenosomes has two main stages. In stage I, cells with typical prokaryotic structure divide by binary...
Tubulins are still considered as typical proteins of Eukaryotes . However, more recently they have been found in the unusual bacteria Prosthecobacter ( btubAB ). In this study, genomic organization btub -genes and their environment were characterized by using newly developed Two-Step Gene Walking method. all investigated Prosthecobacters, organized a bacterial operon. Strikingly, -operons comprise third gene with similarities to kinesin light chain sequences. The environments always...
The order Rickettsiales (Alphaproteobacteria) is a well-known group containing obligate endocellular prokaryotes. encompasses three families (Rickettsiaceae, Anaplasmataceae, and Holosporaceae) fourth, family-level cluster, which includes only one candidate species, "Candidatus Midichloria mitochondrii," as well several unnamed bacterial symbionts. broad host range exhibited by the members of Midichloria" clade suggests their eventual relevance for better understanding evolution symbiosis...
Significance We have investigated multiple aspects of the Euplotes - Polynucleobacter system, which provides a unique opportunity for study an obligate symbiont with closely related free-living organism that itself possesses peculiarly reduced genome and metabolism. confirmed robustness generality patterns in evolution bacterial symbionts’ genome, adding at same time new elements hypotheses concerning reduction both symbiotic bacteria. argue this system will provide exceptionally useful...
Bacteria of the family Rickettsiaceae have always been largely studied not only for their importance in medical field, but also as model systems evolutionary biology. In fact, they share a recent common ancestor with mitochondria. The most species, belonging to genera Rickettsia and Orientia, are hosted by terrestrial arthropods include many human pathogens. Nevertheless, findings show that large part biodiversity actually resides outside group well-known pathogenic bacteria. Collecting data...
Abstract Members of the order Rickettsiales are often found in association with ciliated protists. An interesting case is bacterial endosymbiont “ Candidatus Megaira”, which phylogenetically closely related to pathogen Rickettsia . Megaira” was first described as an intracellular bacterium several ciliate species. Since then it has been diverse evolutionary distantly-related hosts, among them other unicellular eukaryotes, and also algae, metazoa, such cnidarians. We provide characterization...
Taxonomy is the science of defining and naming groups biological organisms based on shared characteristics and, more recently, evolutionary relationships. With birth novel genomics/bioinformatics techniques increasing interest in microbiome studies, a further advance taxonomic discipline appears not only possible but highly desirable. The present work proposes new approach to modern taxonomy, consisting inclusion descriptors organism characterization: (1) presence associated microorganisms...