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  • Superfluidity and superconductivity  (13)
  • Mice  (7)
  • Crystallography, X-Ray  (5)
  • Molecular Sequence Data  (4)
  • 2010-2014  (27)
  • 1
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    Microstructure and ordering of iron vacancies in the superconductor system K_{y} Fe_{x} Se_{2} as seen via transmission electron microscopy (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-04-14
    Description: Author(s): Z. Wang, Y. J. Song, H. L. Shi, Z. W. Wang, Z. Chen, H. F. Tian, G. F. Chen, J. G. Guo, H. X. Yang, and J. Q. Li Structural investigations by means of transmission electron microscopy (TEM) on K_{0.8} Fe_{x} Se_{2} and KFe_{x} Se_{2} , with 1.5 ⩽ x ⩽ 1.8, have revealed a rich variety of microstructure phenomena. Materials with 1.5 ⩽ x ⩽ 1.6 often show a superstructure modulation along the [310] zone-ax... [Phys. Rev. B 83, 140505] Published Wed Apr 13, 2011
    Keywords: Superfluidity and superconductivity
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 2
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    Synthesis and characterization of the layered iron-selenide Na0.8Fe1.6Se2 (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-10-31
    Description: Author(s): Y. J. Long, D. M. Wang, Z. Wang, H. X. Yang, J. B. He, L. X. Zhao, P. P. Wang, M. Q. Xue, J. Q. Li, Z. A. Ren, and G. F. Chen An iron-selenide Na0.8Fe1.6Se2 single crystal has been successfully synthesized using a self-flux method. The electrical resistivity measurement shows that this material exhibits semiconducting behavior in the whole temperature range, with an anomalous increment of resistivity at Ts∼595 K. By varyin... [Phys. Rev. B 90, 144519] Published Thu Oct 30, 2014
    Keywords: Superfluidity and superconductivity
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 3
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    Observation of anomalous temperature dependence of spectrum on small Fermi surfaces in a BiS2-based superconductor (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-08-21
    Description: Author(s): L. K. Zeng, X. B. Wang, J. Ma, P. Richard, S. M. Nie, H. M. Weng, N. L. Wang, Z. Wang, T. Qian, and H. Ding We have performed an angle-resolved photoemission spectroscopy study of the BiS2-based superconductor Nd(O,F)BiS2. Two small electronlike Fermi surfaces around X(π,0) are observed, which enclose 2.4% and 1.1% of the Brillouin zone area, respectively, corresponding to an electron doping of 7% per Bi ... [Phys. Rev. B 90, 054512] Published Wed Aug 20, 2014
    Keywords: Superfluidity and superconductivity
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  • 4
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    Optical conductivity of superconducting Rb_{2}Fe_{4}Se_{5} single crystals (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-03-07
    Description: Author(s): A. Charnukha, J. Deisenhofer, D. Pröpper, M. Schmidt, Z. Wang, Y. Goncharov, A. N. Yaresko, V. Tsurkan, B. Keimer, A. Loidl, and A. V. Boris We report the complex dielectric function of high-quality nearly-stoichiometric Rb 2 Fe 4 Se 5 single crystals with T c =32 K determined by wide-band spectroscopic ellipsometry and time-domain transmission spectroscopy in the spectral range of 1 meV≤ ℏ ω ≤6.5 eV at temperatures of 4 K≤ T ≤300 K . This compound s... [Phys. Rev. B 85, 100504] Published Tue Mar 06, 2012
    Keywords: Superfluidity and superconductivity
    Print ISSN: 1098-0121
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  • 5
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    Electron-hole asymmetry in the superconductivity of doped BaFe_{2} As_{2} seen via the rigid chemical-potential shift in photoemission (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-03-17
    Description: Author(s): M. Neupane, P. Richard, Y.-M. Xu, K. Nakayama, T. Sato, T. Takahashi, A. V. Federov, G. Xu, X. Dai, Z. Fang, Z. Wang, G.-F. Chen, N.-L. Wang, H.-H. Wen, and H. Ding We have performed a systematic photoemission study of the chemical-potential shift as a function of carrier doping in a pnictide system based on BaFe_{2} As_{2} . The experimentally determined chemical-potential shift is consistent with the prediction of a rigid band shift picture by renormalized fi... [Phys. Rev. B 83, 094522] Published Wed Mar 16, 2011
    Keywords: Superfluidity and superconductivity
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  • 6
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    Superconductivity in LiFeO2Fe2Se2 with anti-PbO-type spacer layers (2014)
    American Physical Society (APS)
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    Publication Date: 2014-01-23
    Description: Author(s): X. F. Lu, N. Z. Wang, G. H. Zhang, X. G. Luo, Z. M. Ma, B. Lei, F. Q. Huang, and X. H. Chen We report on a superconductor LiFeO2Fe2Se2 with Tc∼43 K, synthesized via the hydrothermal method. The anti-PbO-type spacer layer of LiFeO2 has been successfully intercalated between the anti-PbO-type FeSe layer, which results in a high-Tc superconductivity in this iron selenide material. In this mat... [Phys. Rev. B 89, 020507] Published Wed Jan 22, 2014
    Keywords: Superfluidity and superconductivity
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  • 7
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    Superconductivity and phase diagram of (Li_{0.8}Fe_{0.2})OHFeSe_{1−x}S_{x} (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-12-24
    Description: Author(s): X. F. Lu, N. Z. Wang, X. G. Luo, G. H. Zhang, X. L. Gong, F. Q. Huang, and X. H. Chen A series of (Li 0.8 Fe 0.2 )OHFeSe 1−x S x (0≤x≤1) samples were successfully synthesized via hydrothermal reaction method and the phase diagram is established. Magnetic susceptibility suggests that an antiferromagnetism arising from (Li 0.8 Fe 0.2 )OH layers coexists with superconductivity, and the antiferroma... [Phys. Rev. B 90, 214520] Published Tue Dec 23, 2014
    Keywords: Superfluidity and superconductivity
    Print ISSN: 1098-0121
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  • 8
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    TRIM24 links a non-canonical histone signature to breast cancer (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-12-18
    Description: Recognition of modified histone species by distinct structural domains within 'reader' proteins plays a critical role in the regulation of gene expression. Readers that simultaneously recognize histones with multiple marks allow transduction of complex chromatin modification patterns into specific biological outcomes. Here we report that chromatin regulator tripartite motif-containing 24 (TRIM24) functions in humans as a reader of dual histone marks by means of tandem plant homeodomain (PHD) and bromodomain (Bromo) regions. The three-dimensional structure of the PHD-Bromo region of TRIM24 revealed a single functional unit for combinatorial recognition of unmodified H3K4 (that is, histone H3 unmodified at lysine 4, H3K4me0) and acetylated H3K23 (histone H3 acetylated at lysine 23, H3K23ac) within the same histone tail. TRIM24 binds chromatin and oestrogen receptor to activate oestrogen-dependent genes associated with cellular proliferation and tumour development. Aberrant expression of TRIM24 negatively correlates with survival of breast cancer patients. The PHD-Bromo of TRIM24 provides a structural rationale for chromatin activation through a non-canonical histone signature, establishing a new route by which chromatin readers may influence cancer pathogenesis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3058826/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3058826/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tsai, Wen-Wei -- Wang, Zhanxin -- Yiu, Teresa T -- Akdemir, Kadir C -- Xia, Weiya -- Winter, Stefan -- Tsai, Cheng-Yu -- Shi, Xiaobing -- Schwarzer, Dirk -- Plunkett, William -- Aronow, Bruce -- Gozani, Or -- Fischle, Wolfgang -- Hung, Mien-Chie -- Patel, Dinshaw J -- Barton, Michelle Craig -- GM079641/GM/NIGMS NIH HHS/ -- GM081627/GM/NIGMS NIH HHS/ -- P01 GM081627/GM/NIGMS NIH HHS/ -- P01 GM081627-010003/GM/NIGMS NIH HHS/ -- P01 GM081627-020003/GM/NIGMS NIH HHS/ -- P30 EB009998/EB/NIBIB NIH HHS/ -- P30DK078392-01/DK/NIDDK NIH HHS/ -- T32 HD07325/HD/NICHD NIH HHS/ -- U54 RR025216/RR/NCRR NIH HHS/ -- UL1 TR000077/TR/NCATS NIH HHS/ -- England -- Nature. 2010 Dec 16;468(7326):927-32. doi: 10.1038/nature09542.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology, Program in Genes and Development, Graduate School of Biomedical Sciences, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21164480" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Breast Neoplasms/*genetics/*metabolism/pathology ; Carrier Proteins/chemistry/genetics/*metabolism ; Cell Line, Tumor ; Chromatin/metabolism ; Chromatin Assembly and Disassembly ; Crystallography, X-Ray ; Estrogen Receptor alpha/metabolism ; Estrogens/metabolism ; *Gene Expression Regulation, Neoplastic/genetics ; HEK293 Cells ; Histones/chemistry/*metabolism ; Humans ; Methylation ; Protein Array Analysis ; Protein Binding ; Protein Structure, Tertiary ; Substrate Specificity ; Survival Rate
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 9
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    PTIP promotes chromatin changes critical for immunoglobulin class switch recombination (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-07-31
    Description: Programmed genetic rearrangements in lymphocytes require transcription at antigen receptor genes to promote accessibility for initiating double-strand break (DSB) formation critical for DNA recombination and repair. Here, we showed that activated B cells deficient in the PTIP component of the MLL3 (mixed-lineage leukemia 3)-MLL4 complex display impaired trimethylation of histone 3 at lysine 4 (H3K4me3) and transcription initiation of downstream switch regions at the immunoglobulin heavy-chain (Igh) locus, leading to defective immunoglobulin class switching. We also showed that PTIP accumulation at DSBs contributes to class switch recombination (CSR) and genome stability independently of Igh switch transcription. These results demonstrate that PTIP promotes specific chromatin changes that control the accessibility of the Igh locus to CSR and suggest a nonredundant role for the MLL3-MLL4 complex in altering antibody effector function.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3008398/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3008398/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Daniel, Jeremy A -- Santos, Margarida Almeida -- Wang, Zhibin -- Zang, Chongzhi -- Schwab, Kristopher R -- Jankovic, Mila -- Filsuf, Darius -- Chen, Hua-Tang -- Gazumyan, Anna -- Yamane, Arito -- Cho, Young-Wook -- Sun, Hong-Wei -- Ge, Kai -- Peng, Weiqun -- Nussenzweig, Michel C -- Casellas, Rafael -- Dressler, Gregory R -- Zhao, Keji -- Nussenzweig, Andre -- Z01 AR041149-03/Intramural NIH HHS/ -- Z01 AR041149-04/Intramural NIH HHS/ -- Z01 DK047055-01/Intramural NIH HHS/ -- Z01 DK047055-02/Intramural NIH HHS/ -- Z01 DK075003-04/Intramural NIH HHS/ -- Z01 DK075003-05/Intramural NIH HHS/ -- Z99 DK999999/Intramural NIH HHS/ -- ZIA AR041149-05/Intramural NIH HHS/ -- ZIA DK075017-03/Intramural NIH HHS/ -- ZIADK047055-03/DK/NIDDK NIH HHS/ -- ZIADK075003-06/DK/NIDDK NIH HHS/ -- ZIADK075017-01/DK/NIDDK NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Aug 20;329(5994):917-23. doi: 10.1126/science.1187942. Epub 2010 Jul 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Experimental Immunology Branch, National Cancer Institute, National Institutes of Health (NIH), Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20671152" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibody Specificity/genetics ; Carrier Proteins/genetics/*physiology ; Cytidine Deaminase/metabolism ; Dna ; Histones/metabolism ; Immunoglobulin Class Switching/genetics/*physiology ; Immunoglobulin Switch Region ; Methylation ; Mice ; Nuclear Proteins/genetics/*physiology ; Promoter Regions, Genetic ; Recombination, Genetic ; Transcriptional Activation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    GSK3-TIP60-ULK1 signaling pathway links growth factor deprivation to autophagy (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-04-28
    Description: In metazoans, cells depend on extracellular growth factors for energy homeostasis. We found that glycogen synthase kinase-3 (GSK3), when deinhibited by default in cells deprived of growth factors, activates acetyltransferase TIP60 through phosphorylating TIP60-Ser(86), which directly acetylates and stimulates the protein kinase ULK1, which is required for autophagy. Cells engineered to express TIP60(S86A) that cannot be phosphorylated by GSK3 could not undergo serum deprivation-induced autophagy. An acetylation-defective mutant of ULK1 failed to rescue autophagy in ULK1(-/-) mouse embryonic fibroblasts. Cells used signaling from GSK3 to TIP60 and ULK1 to regulate autophagy when deprived of serum but not glucose. These findings uncover an activating pathway that integrates protein phosphorylation and acetylation to connect growth factor deprivation to autophagy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lin, Shu-Yong -- Li, Terytty Yang -- Liu, Qing -- Zhang, Cixiong -- Li, Xiaotong -- Chen, Yan -- Zhang, Shi-Meng -- Lian, Guili -- Liu, Qi -- Ruan, Ka -- Wang, Zhen -- Zhang, Chen-Song -- Chien, Kun-Yi -- Wu, Jiawei -- Li, Qinxi -- Han, Jiahuai -- Lin, Sheng-Cai -- New York, N.Y. -- Science. 2012 Apr 27;336(6080):477-81. doi: 10.1126/science.1217032.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Fujian, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22539723" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Autophagy ; Cell Line ; Cell Line, Tumor ; Culture Media ; Culture Media, Serum-Free ; Glucose/metabolism ; Glycogen Synthase Kinase 3/genetics/*metabolism ; HEK293 Cells ; Histone Acetyltransferases/genetics/*metabolism ; Humans ; Intercellular Signaling Peptides and Proteins/metabolism ; Intracellular Signaling Peptides and Proteins/genetics/*metabolism ; Mice ; Phosphorylation ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Rats ; *Signal Transduction ; Trans-Activators/genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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