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https://www.readbyqxmd.com/read/26621829/the-linc-complex-component-sun4-plays-a-crucial-role-in-sperm-head-formation-and-fertility
#1
Elisabeth Pasch, Jana Link, Carolin Beck, Stefanie Scheuerle, Manfred Alsheimer
LINC complexes are evolutionarily conserved nuclear envelope bridges, physically connecting the nucleus to the peripheral cytoskeleton. They are pivotal for dynamic cellular and developmental processes, like nuclear migration, anchoring and positioning, meiotic chromosome movements and maintenance of cell polarity and nuclear shape. Active nuclear reshaping is a hallmark of mammalian sperm development and, by transducing cytoskeletal forces to the nuclear envelope, LINC complexes could be vital for sperm head formation as well...
November 30, 2015: Biology Open
https://www.readbyqxmd.com/read/26417726/sun4-is-essential-for-nuclear-remodeling-during-mammalian-spermiogenesis
#2
Alessandra Calvi, Arnette Shi Wei Wong, Graham Wright, Esther Sook Miin Wong, Tsui Han Loo, Colin L Stewart, Brian Burke
One of the more dramatic examples of cellular reorganization occurs during spermiogenesis in which a roughly spherical spermatid is transformed into a mature sperm cell. A highlight of this process involves nuclear remodeling whereby the round spermatid nucleus is sculpted into an elongated and polar structure. This transformation in nuclear architecture features chromatin condensation, changes in the composition and organization of the nuclear lamina and redistribution and elimination of nuclear pore complexes...
November 15, 2015: Developmental Biology
https://www.readbyqxmd.com/read/25775403/sept12-spag4-laminb1-complexes-are-required-for-maintaining-the-integrity-of-the-nuclear-envelope-in-postmeiotic-male-germ-cells
#3
Chung-Hsin Yeh, Pao-Lin Kuo, Ya-Yun Wang, Ying-Yu Wu, Mei-Feng Chen, Ding-Yen Lin, Tsung-Hsuan Lai, Han-Sun Chiang, Ying-Hung Lin
Male infertility affects approximately 50% of all infertile couples. The male-related causes of intracytoplasmic sperm injection failure include the absence of sperm, immotile or immature sperm, and sperm with structural defects such as those caused by premature chromosomal condensation and DNA damage. Our previous studies based on a knockout mice model indicated that SEPT12 proteins are critical for the terminal morphological formation of sperm. SEPT12 mutations in men result in teratozospermia and oligozospermia...
2015: PloS One
https://www.readbyqxmd.com/read/17060531/transcriptional-profiles-of-the-response-to-ketoconazole-and-amphotericin-b-in-trichophyton-rubrum
#4
Lu Yu, Wenliang Zhang, Lingling Wang, Jian Yang, Tao Liu, Junping Peng, Wenchuan Leng, Lihong Chen, Ruoyu Li, Qi Jin
Trichophyton rubrum is a pathogenic filamentous fungus of increasing medical concern. Two antifungal agents, ketoconazole (KTC) and amphotericin B (AMB), have specific activity against dermatophytes. To identify the mechanisms of action of KTC and AMB against T. rubrum, a cDNA microarray was constructed from the expressed sequence tags of the cDNA library from different developmental stages, and transcriptional profiles of the responses to KTC and AMB were determined. T. rubrum was exposed to subinhibitory concentrations of KTC and AMB for 12 h, and microarray analysis was used to examine gene transcription...
January 2007: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/16911514/yeast-genes-involved-in-response-to-lactic-acid-and-acetic-acid-acidic-conditions-caused-by-the-organic-acids-in-saccharomyces-cerevisiae-cultures-induce-expression-of-intracellular-metal-metabolism-genes-regulated-by-aft1p
#5
Miho Kawahata, Kazuo Masaki, Tsutomu Fujii, Haruyuki Iefuji
Using two types of genome-wide analysis to investigate yeast genes involved in response to lactic acid and acetic acid, we found that the acidic condition affects metal metabolism. The first type is an expression analysis using DNA microarrays to investigate 'acid shock response' as the first step to adapt to an acidic condition, and 'acid adaptation' by maintaining integrity in the acidic condition. The other is a functional screening using the nonessential genes deletion collection of Saccharomyces cerevisiae...
September 2006: FEMS Yeast Research
https://www.readbyqxmd.com/read/10870102/the-sun-family-yeast-sun4-scw3-is-involved-in-cell-septation
#6
M Mouassite, N Camougrand, E Schwob, G Demaison, M Laclau, M Guérin
SUN4 is the fourth member of the SUN gene family from S. cerevisiae, whose products display high homology in their 258 amino acid C-terminal domain. SIM1, UTH1, NCA3 (the founding members) are involved in different cellular processes (DNA replication, ageing, mitochondrial biogenesis) and it is shown herein that SUN4 plays a role in the cell septation process. sun4 delta cells are larger than wild-type and begin a new cell cycle before they have separated from their mother cell. This phenotype is more pronounced in sun4Delta cells also deleted for UTH1...
July 2000: Yeast
https://www.readbyqxmd.com/read/10683261/the-sun-family-uth1-an-ageing-gene-is-also-involved-in-the-regulation-of-mitochondria-biogenesis-in-saccharomyces-cerevisiae
#7
N M Camougrand, M Mouassite, G M Velours, M G Guérin
Since it was shown in previous work that NCA3 (one of the four genes of the SUN family) is involved in mitochondrial protein synthesis regulation, the effect of the other members of this gene family was tested. UTH1 (but not SUN4 or SIM1) was also shown to interfere with mitochondria biogenesis. In Deltauth1 cells, cytochromes aa(3), c, and b were lowered by 25 and 15%, respectively. In the double-null mutant Deltauth1Deltanca3, only cytochrome aa(3) was lowered by 50% relative to the wild type. However, the ratio of cellular respiration to cytochrome oxidase was greatly enhanced in the double-null mutant...
March 1, 2000: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/10612745/the-sun-family-of-saccharomyces-cerevisiae-the-double-knock-out-of-uth1-and-sim1-promotes-defects-in-nucleus-migration-and-increased-drug-sensitivity
#8
M Mouassite, M G Guérin, N M Camougrand
UTH1 and SIM1 are two of four 'SUN' genes (SIM1, UTH1, NCA3 and SUN4/SCW3) whose products are involved in different cellular processes such as DNA replication, lifespan, mitochondrial biogenesis or cell septation. UTH1 or SIM1 inactivation did not affect cell growth, shape or nuclear migration, whereas the double null mutant presented phenotypes of numerous binucleate cells and benomyl sensitivity, suggesting that microtubule function could be altered; the uth1Deltasim1Delta strain also presented defects which could be related to the Ras/cAMP pathway: pet phenotype, heat shock sensitivity, inability to store glycogen, sensitivity to starvation and failure of spores to germinate...
January 1, 2000: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/8402212/geneview-multi-language-human-gene-mapping-library-with-a-graphical-user-interface
#9
H Dohi, M Ishizuka, S Minoshima, N Shimizu
GeneView is a newly developed human gene mapping library system that works on an X-Window platform. This system is designed for researchers who routinely utilize gene mapping data in the laboratory but are unfamiliar with computer technology. GeneView offers various features, including friendly user interface, fast operation and visualization facility. Genetic loci are displayed graphically with an idiogram. This system can be operated in multiple languages. A current version supports Japanese and English, and can be easily expanded to include other languages...
August 1993: Computer Applications in the Biosciences: CABIOS
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