Rickettsiaceae, Rickettsia-Like Endosymbionts, and the Origin of Mitochondria

2001 ◽  
Vol 21 (1) ◽  
pp. 1-17 ◽  
Author(s):  
Victor V. Emelyanov
Keyword(s):  
Eukaryotic Cell ◽  
Small Subunit ◽  
Last Common Ancestor ◽  
Fusion Partner ◽  
Trna Synthetases ◽  
The Family ◽  
Endosymbiotic Event ◽  
History Of ◽  
Mitochondrial Origin

Accumulating evolutionary data point to a monophyletic origin of mitochondria from the order Rickettsiales. This large group of obligate intracellular α-Proteobacteria includes the family Rickettsiaceae and several rickettsia-like endosymbionts (RLEs). Detailed phylogenetic analysis of small subunit (SSU) rRNA and chaperonin 60 (Cpn60) sequences testify to polyphyly of the Rickettsiales, and consistently indicate a sisterhood of Rickettsiaceae and mitochondria that excludes RLEs. Thus RLEs are considered as the nearest extant relatives of an extinct last common ancestor of mitochondria and rickettsiae. Phylogenetic inferences prompt the following assumptions. (1) Mitochondrial origin has been predisposed by the long-term endosymbiotic relationship between rickettsia-like bacteria and proto-eukaryotes, in which many endosymbiont genes have been lost while some indispensable genes have been transferred to the host genome. (2) The obligate dependence of rickettsiae upon a eukaryotic host rests on the import of proteins encoded by these transferred genes.The nature of a proto-eukaryotic cell still remains elusive. The divergence of Rickettsiaceae and mitochondria based on Cpn60, and the evolutionary history of two aminoacyl-tRNA synthetases favor the hypothesis that it was a chimera created by fusion of an archaebacterium and a eubacterium not long before an endosymbiotic event. These and other, mostly biochemical data suggest that all the mitochondrion-related organelles, i.e., both aerobically and anaerobically respiring mitochondria and hydrogenosomes, have originated from the same RLE, while hydrogenosomal energy metabolism may have a separate origin resulting from a eubacterial fusion partner.

scholarly journals Most Compositae (Asteraceae) are descendants of a paleohexaploid and all share a paleotetraploid ancestor with the Calyceraceae

2016 ◽  
Author(s):  
Michael S. Barker ◽  
Zheng Li ◽  
Thomas I. Kidder ◽  
Chris R. Reardon ◽  
Zhao Lai ◽  
...  
Keyword(s):  
Gene Family ◽  
Linkage Map ◽  
Evolutionary History ◽  
Genome Duplication ◽  
Nuclear Gene ◽  
Flowering Plants ◽  
The Family ◽  
History Of ◽  
Phylogenomic Analyses

AbstractPremise of the studyLike many other flowering plants, members of the Compositae (Asteraceae) have a polyploid ancestry. Previous analyses found evidence for an ancient duplication or possibly triplication in the early evolutionary history of the family. We sought to better place this paleopolyploidy in the phylogeny and assess its nature.MethodsWe sequenced new transcriptomes for Barnadesia, the lineage sister to all other Compositae, and four representatives of closely related families. Using a recently developed algorithm, MAPS, we analyzed nuclear gene family phylogenies for evidence of paleopolyploidy.Key resultsWe found that the previously recognized Compositae paleopolyploidy is also in the ancestry of the Calyceraceae. Our phylogenomic analyses uncovered evidence for a successive second round of genome duplication among all sampled Compositae except Barnadesia.ConclusionsOur analyses of new samples with new tools provide a revised view of paleopolyploidy in the Compositae. Together with results from a high density Lactuca linkage map, our results suggest that the Compositae and Calyceraceae have a common paleotetraploid ancestor and most Compositae are descendants of a paleohexaploid. Although paleohexaploids have been previously identified, this is the first example where the paleotetraploid and paleohexaploid lineages have survived over tens of millions of years. The complex polyploidy in the ancestry of the Compositae and Calyceraceae represents a unique opportunity to study the long-term evolutionary fates and consequences of different ploidal levels.

scholarly journals Boris Valkh and the development of zoology and museology in the East of Ukraine

2018 ◽  
Keyword(s):  
20Th Century ◽  
Plant Protection ◽  
Type Locality ◽  
Main Attention ◽  
The Family ◽  
History Of ◽  
The One ◽  
Ancient Maps ◽  
Made In

The details of biography and scientific works of Boris Valkh (1876–1942), one of the leading zoologists who worked in eastern Ukraine in the first half of the 20th century, were analysed. Boris Valkh worked at the interface of zoology, plant protection, and epidemiology and he was a leading specialist in controlling the abundance of economically important groups of rodents and insects (plant protection stations) and an epidemiologist (studying zoonoses). At the same time, he was a nature protector, one of the key organizers of nature reserves in the southeast of Ukraine (Kamiani Mohyly, Bilosaraiska Kosa). The main attention in this review is paid to Valkh's research into zoology (ornithology, entomology, and theriology), and his work upon creation of zoological collections, including the one in the Bakhmut Museum of Local Lore, which was organized with his participation. All of these developments made by the scientist are considered along with details of his biography analysed using family archives and by conversations with Valkh’s descendents, including his grandson Boris Valkh, granddaughter Olympiada Gryshchenko, and great-grandson Sergei Valkh. Significant clarifications and important additions to the biography of Boris Valkh have been made, in particular regarding his education (once in Pavlohrad Gymnasium and twice in Kharkiv University), wife and children, as well as his long-term trips to Turkestan and Azerbaijan. The location of "Hory-Mohyly hamlet", from which most of the zoological samples collected by the Valkhs are derived, is clarified and determined as the same place that was marked on ancient maps as "Horemohylove" The history of the species Mus sergii described by Boris Valkh and its type locality were analysed. The information about the history of accumulation and further fate of his and his son Sergey’s zoological collections including mammal specimens from Hory-Mohyly is summarized. Unique original photographs from the family archives have been used, for most of which the dates and places of taking were determined. Pictures of collections and original zoological labels are also presented.

scholarly journals New Religious Movements before Modernity?

2018 ◽  
Vol 21 (4) ◽  
pp. 13-37
Author(s):  
Andreas Pietsch ◽  
Sita Steckel
Keyword(s):  
Interdisciplinary Research ◽  
Religious Diversity ◽  
Religious Movements ◽  
Religious Communities ◽  
New Religious Movements ◽  
Ongoing Debate ◽  
New Religions ◽  
The Family ◽  
History Of

Can the study of new religious movements be extended historically towards a longue durée history of religious innovation? Several sociological theories suggest that fundamental differences between premodern and modern religious configurations preclude this, pointing to a lack of religious diversity and freedom of religion in premodern centuries. Written from a historical perspective, this article questions this view and suggests historical religious movements within Christianity as possible material for a long-term perspective. Using the Franciscans and the Family of Love as examples, it points out possible themes for productive interdisciplinary research. One suggestion is to study the criticisms surrounding premodern new religious movements, which might be used to analyze the historical differentiation of religion. Another avenue is the study of premodern terminologies and concepts for religious communities, which could provide a historical horizon for the ongoing debate about the typology of new religions.

scholarly journals New geochemical data on fossil wood from the Albian of the Dolomites (Southern Alps, Italy)

2012 ◽  
Vol 63 (5) ◽  
pp. 399-405 ◽  
Author(s):  
Alexander Lukeneder ◽  
Achim Bechtel ◽  
Reinhard Gratzer
Keyword(s):  
Lower Cretaceous ◽  
Hydrocarbon Composition ◽  
Southern Alps ◽  
Geochemical Data ◽  
Tectonic History ◽  
The Family ◽  
History Of ◽  
Drift Wood ◽  
Wood Fragment

Abstract Information is provided about organic-matter bearing sediments and fossil drift-wood from the Puez area (Col de Puez, Southern Alps) near Wolkenstein (S. Tyrol, Italy). The locality is located on the Trento Plateau which represents a submarine high during the Lower Cretaceous. Its terpenoid hydrocarbon composition indicates that the wood fragment derived from a conifer belonging to the family Podocarpaceae or Araucariaceae. Intense degradation of OM argues for lengthier drifting. Long-term drifting is also indicated by the infestation of the bivalve Teredo (“shipworm”). The finding of a fossil tree trunk sheds some light on the early Lower Cretaceous tectonic history of the Trento Plateau and the Dolomites.

The Prevalence of Hereditary Antithrombin-III Deficiency in Patients with a History of Venous Thromboembolism

1985 ◽  
Vol 54 (04) ◽  
pp. 744-745 ◽  
Author(s):  
R Vikydal ◽  
C Korninger ◽  
P A Kyrle ◽  
H Niessner ◽  
I Pabinger ◽  
...  
Keyword(s):  
Venous Thrombosis ◽  
Antithrombin Iii ◽  
Positive Family History ◽  
Normal Range ◽  
The Family ◽  
History Of ◽  
Antithrombin Iii Deficiency ◽  
Recurrent Venous Thrombosis ◽  
Antithrombin Iii Activity ◽  
Slight Deficiency

SummaryAntithrombin-III activity was determined in 752 patients with a history of venous thrombosis and/or pulmonary embolism. 54 patients (7.18%) had an antithrombin-III activity below the normal range. Among these were 13 patients (1.73%) with proven hereditary deficiency. 14 patients were judged to have probable hereditary antithrombin-III deficiency, because they had a positive family history, but antithrombin-III deficiency could not be verified in other members of the family. In the 27 remaining patients (most of them with only slight deficiency) hereditary antithrombin-III deficiency was unlikely. The prevalence of hereditary antithrombin-III deficiency was higher in patients with recurrent venous thrombosis.

Atypical Femoral Fracture in McCune-Albright Syndrome

2020 ◽  
Vol 7 (3) ◽  
pp. 147-152
Author(s):  
Salman Ghaffari ◽  
◽  
Mehran Razavipour ◽  
Parastoo Mohammad Amini ◽  
◽  
...  
Keyword(s):  
Femoral Fracture ◽  
Dynamic Compression ◽  
Plate Fixation ◽  
Medullary Canal ◽  
Mccune Albright Syndrome ◽  
Café Au Lait Spots ◽  
History Of ◽  
Albright Syndrome ◽  
Mccune Albright

McCune-Albright Syndrome (MAS) is characterized by endocrinopathies, café-au-lait spots, and fibrous dysplasia. Bisphosphonates are the most prescribed treatment for reducing the pain but their long-term use has been associated with atypical fractures of cortical bones like femur in patients. We present a 23-year-old girl diagnosed with MAS. She had an atypical mid-shaft left femoral fracture that happened during simple walking. She also had a history of long-term use of alendronate. Because of the narrow medullary canal, we used 14 holes hybrid locking plate for the lateral aspect of the thigh to fix the fracture and 5 holes dynamic compression plate (instead of the intramedullary nail) in the anterior surface to double fix it, reducing the probability of device failure. With double plate fixation and discontinuation of alendronate, the complete union was achieved five months after surgery

Can a Narcissist Ever Marry?: James Fisher and The Uninvited Guest

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Brett Kahr
Keyword(s):  
Clinical Material ◽  
Couple Relationships ◽  
Cocktail Party ◽  
False Self ◽  
Winter's Tale ◽  
Pathological Narcissism ◽  
The Family ◽  
History Of ◽  
Marital Partners

Few books in the burgeoning field of couple psychoanalysis have garnered as much admiration as James Fisher's The Uninvited Guest: Emerging from Narcissism towards Marriage. In this memorial essay, the author pays tribute to the late Dr Fisher and to his perennial book which explores the ways in which pathological narcissism, among other factors, inhibit the development of spousal intimacy, often destroying partnerships entirely. The author describes the creative way in which Fisher drew upon great works of literature, most notably William Shakespeare's A Winter's Tale, and T. S. Eliot's The Cocktail Party, as well as long-forgotten clinical material from Fisher's predecessors at the Family Discussion Bureau (forerunner of the Tavistock Centre for Couple Relationships), in order to understand the ways in which marital partners struggle with false self couplings. The author assesses the importance of Fisher's contribution in the context of the history of couple psychoanalysis.

European Integration

2020 ◽  
Author(s):  
Johann P. Arnason
Keyword(s):  
European Integration ◽  
Eastern European ◽  
The European Union ◽  
Historical Processes ◽  
History Of ◽  
External Conditions ◽  
Eastern European Countries ◽  
Totalitarian Regimes ◽  
The Eu

Different understandings of European integration, its background and present problems are represented in this book, but they share an emphasis on historical processes, geopolitical dynamics and regional diversity. The introduction surveys approaches to the question of European continuities and discontinuities, before going on to an overview of chapters. The following three contributions deal with long-term perspectives, including the question of Europe as a civilisational entity, the civilisational crisis of the twentieth century, marked by wars and totalitarian regimes, and a comparison of the European Union with the Habsburg Empire, with particular emphasis on similar crisis symptoms. The next three chapters discuss various aspects and contexts of the present crisis. Reflections on the Brexit controversy throw light on a longer history of intra-Union rivalry, enduring disputes and changing external conditions. An analysis of efforts to strengthen the EU’s legal and constitutional framework, and of resistances to them, highlights the unfinished agenda of integration. A closer look at the much-disputed Islamic presence in Europe suggests that an interdependent radicalization of Islamism and the European extreme right is a major factor in current political developments. Three concluding chapters adopt specific regional perspectives. Central and Eastern European countries, especially Poland, are following a path that leads to conflicts with dominant orientations of the EU, but this also raises questions about Europe’s future. The record of Scandinavian policies in relation to Europe exemplifies more general problems faced by peripheral regions. Finally, growing dissonances and divergences within the EU may strengthen the case for Eurasian perspectives.

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