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Christian Gieffers Frank Korioth Peter Heimann Christian Ungermann Jürgen Frey 《Experimental cell research》1997,232(2):395
Mitofilin, also known as heart muscle protein, is a recently identified mitochondrial protein. We have isolated two human cDNAs that encode different isoforms of mitofilin. Using reverse PCR, we provide evidence that both isoforms are derived by alternative splicing and encode two proteins of 88 and 90 kDa that are detected in immunoblot analyses with mitofilin-specific antibodies. Immunofluorescence microscopy, fractionating of human osteosarcoma cells, and protease protection experiments with isolated mitochondria and mitoplasts indicate that mitofilin is an integral membrane protein of the inner mitochondrial membrane.35S-labeled mitofilin is transported into isolated yeast mitochondria in a reaction that depends on the membrane potential across the inner mitochondrial membrane (ΔΨ). During mitochondrialin vitroimport, mitofilin is proteolytically processed to the mature protein that is also detected in cellular fractions, indicating that the amino-terminal leader sequence is removed. Sequence analysis and our results suggest that mitofilin is anchored in the inner mitochondrial membrane with an amino-terminal transmembrane domain, while the majority of the protein is extruding into the intermembrane space. 相似文献
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Nihal Kenawy Helen Kalirai Joseph J. Sacco Sarah L. Lake Steffen Heegaard Ann‐Cathrine Larsen Paul T. Finger Tatyana Milman Kimberly Chin Carlo Mosci Francesco Lanza Alexandre Moulin Caroline A. Schmitt Jean Pierre Caujolle Clia Maschi Marina Marinkovic Azzam F. Taktak Heinrich Heimann Bertil E. Damato Sarah E. Coupland 《Pigment cell & melanoma research》2019,32(4):564-575
Relatively little is known about the genetic aberrations of conjunctival melanomas (CoM) and their correlation with clinical and histomorphological features as well as prognosis. The aim of this large collaborative multicenter study was to determine potential key biomarkers for metastatic risk and any druggable targets for high metastatic risk CoM. Using Affymetrix single nucleotide polymorphism genotyping arrays on 59 CoM, we detected frequent amplifications on chromosome (chr) 6p and deletions on 7q, and characterized mutation‐specific copy number alterations. Deletions on chr 10q11.21‐26.2, a region harboring the tumor suppressor genes, PDCD4, SUFU, NEURL1, PTEN, RASSF4, DMBT1, and C10orf90 and C10orf99, significantly correlated with metastasis (Fisher's exact, p ≤ 0.04), lymphatic invasion (Fisher's exact, p ≤ 0.02), increasing tumor thickness (Mann–Whitney, p ≤ 0.02), and BRAF mutation (Fisher's exact, p ≤ 0.05). This enhanced insight into CoM biology is a step toward identifying patients at risk of metastasis and potential therapeutic targets for systemic disease. 相似文献
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Reconciling Carbon-cycle Concepts, Terminology, and Methods 总被引:5,自引:1,他引:4
F. S. Chapin III G. M. Woodwell J. T. Randerson E. B. Rastetter G. M. Lovett D. D. Baldocchi D. A. Clark M. E. Harmon D. S. Schimel R. Valentini C. Wirth J. D. Aber J. J. Cole M. L. Goulden J. W. Harden M. Heimann R. W. Howarth P. A. Matson A. D. McGuire J. M. Melillo H. A. Mooney J. C. Neff R. A. Houghton M. L. Pace M. G. Ryan S. W. Running O. E. Sala W. H. Schlesinger E.-D. Schulze 《Ecosystems》2006,9(7):1041-1050
Recent projections of climatic change have focused a great deal of scientific and public attention on patterns of carbon (C)
cycling as well as its controls, particularly the factors that determine whether an ecosystem is a net source or sink of atmospheric
carbon dioxide (CO2). Net ecosystem production (NEP), a central concept in C-cycling research, has been used by scientists to represent two different
concepts. We propose that NEP be restricted to just one of its two original definitions—the imbalance between gross primary
production (GPP) and ecosystem respiration (ER). We further propose that a new term—net ecosystem carbon balance (NECB)—be
applied to the net rate of C accumulation in (or loss from [negative sign]) ecosystems. Net ecosystem carbon balance differs
from NEP when C fluxes other than C fixation and respiration occur, or when inorganic C enters or leaves in dissolved form.
These fluxes include the leaching loss or lateral transfer of C from the ecosystem; the emission of volatile organic C, methane,
and carbon monoxide; and the release of soot and CO2 from fire. Carbon fluxes in addition to NEP are particularly important determinants of NECB over long time scales. However,
even over short time scales, they are important in ecosystems such as streams, estuaries, wetlands, and cities. Recent technological
advances have led to a diversity of approaches to the measurement of C fluxes at different temporal and spatial scales. These
approaches frequently capture different components of NEP or NECB and can therefore be compared across scales only by carefully
specifying the fluxes included in the measurements. By explicitly identifying the fluxes that comprise NECB and other components
of the C cycle, such as net ecosystem exchange (NEE) and net biome production (NBP), we can provide a less ambiguous framework
for understanding and communicating recent changes in the global C cycle. 相似文献
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RP Tucker K Drabikowski JF Hess J Ferralli R Chiquet-Ehrismann JC Adams 《BMC evolutionary biology》2006,6(1):60-17
Background
Tenascins are a family of glycoproteins found primarily in the extracellular matrix of embryos where they help to regulate cell proliferation, adhesion and migration. In order to learn more about their origins and relationships to each other, as well as to clarify the nomenclature used to describe them, the tenascin genes of the urochordate Ciona intestinalis, the pufferfish Tetraodon nigroviridis and Takifugu rubripes and the frog Xenopus tropicalis were identified and their gene organization and predicted protein products compared with the previously characterized tenascins of amniotes. 相似文献10.
Ants are powerful model systems for the study of cooperation and sociality. In this review, we discuss how recent advances in ant genomics have contributed to our understanding of the evolution and organization of insect societies at the molecular level. 相似文献