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  • 1
    Publication Date: 2012-03-30
    Description: H(+)-translocating pyrophosphatases (H(+)-PPases) are active proton transporters that establish a proton gradient across the endomembrane by means of pyrophosphate (PP(i)) hydrolysis. H(+)-PPases are found primarily as homodimers in the vacuolar membrane of plants and the plasma membrane of several protozoa and prokaryotes. The three-dimensional structure and detailed mechanisms underlying the enzymatic and proton translocation reactions of H(+)-PPases are unclear. Here we report the crystal structure of a Vigna radiata H(+)-PPase (VrH(+)-PPase) in complex with a non-hydrolysable substrate analogue, imidodiphosphate (IDP), at 2.35 A resolution. Each VrH(+)-PPase subunit consists of an integral membrane domain formed by 16 transmembrane helices. IDP is bound in the cytosolic region of each subunit and trapped by numerous charged residues and five Mg(2+) ions. A previously undescribed proton translocation pathway is formed by six core transmembrane helices. Proton pumping can be initialized by PP(i) hydrolysis, and H(+) is then transported into the vacuolar lumen through a pathway consisting of Arg 242, Asp 294, Lys 742 and Glu 301. We propose a working model of the mechanism for the coupling between proton pumping and PP(i) hydrolysis by H(+)-PPases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lin, Shih-Ming -- Tsai, Jia-Yin -- Hsiao, Chwan-Deng -- Huang, Yun-Tzu -- Chiu, Chen-Liang -- Liu, Mu-Hsuan -- Tung, Jung-Yu -- Liu, Tseng-Huang -- Pan, Rong-Long -- Sun, Yuh-Ju -- England -- Nature. 2012 Mar 28;484(7394):399-403. doi: 10.1038/nature10963.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Life Science and Institute of Bioinformatics and Structural Biology, College of Life Science, National Tsing Hua University, Hsinchu 30013, Taiwan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22456709" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Cell Membrane/metabolism ; Crystallography, X-Ray ; Cytosol/metabolism ; Diphosphonates/chemistry/metabolism ; Fabaceae/*enzymology ; Hydrolysis ; Inorganic Pyrophosphatase/*chemistry/*metabolism ; Magnesium/metabolism ; Membrane Proteins/*chemistry/metabolism ; Models, Molecular ; Protein Structure, Tertiary ; Protein Subunits/chemistry/metabolism ; Protons ; Static Electricity ; Vacuoles/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2011-06-14
    Description: Author(s): J. J. Ying, X. F. Wang, X. G. Luo, A. F. Wang, M. Zhang, Y. J. Yan, Z. J. Xiang, R. H. Liu, P. Cheng, G. J. Ye, and X. H. Chen We successfully grew the high-quality single crystals of A x Fe 2 Se 2 ( A = K and Cs) by self-flux method. Sharp superconducting transition was observed for both types of crystals. The crystals show the onset superconducting transition temperatures ( T c ) of 31 and 30 K for K and Cs compounds, respectively... [Phys. Rev. B 83, 212502] Published Mon Jun 13, 2011
    Keywords: Superfluidity and superconductivity
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 3
    Publication Date: 2011-12-21
    Description: Author(s): X. F. Wang, Y. J. Yan, Z. Gui, R. H. Liu, J. J. Ying, X. G. Luo, and X. H. Chen [Phys. Rev. B 84, 214523] Published Tue Dec 20, 2011
    Keywords: Superfluidity and superconductivity
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 4
    Publication Date: 2011-08-24
    Description: Author(s): Z.-H. Liu, P. Richard, K. Nakayama, G.-F. Chen, S. Dong, J.-B. He, D.-M. Wang, T.-L. Xia, K. Umezawa, T. Kawahara, S. Souma, T. Sato, T. Takahashi, T. Qian, Yaobo Huang, Nan Xu, Yingbo Shi, H. Ding, and S.-C. Wang We have performed high-resolution angle-resolved photoemission measurements on superconducting electron-doped NaFe 0.95 Co 0.05 As ( T c ∼18 K ). We observed a holelike Fermi surface around the zone center and two electronlike Fermi surfaces around the M point, which can be connected by the Q =( π , π ) wave vec... [Phys. Rev. B 84, 064519] Published Tue Aug 23, 2011
    Keywords: Superfluidity and superconductivity
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 5
    Publication Date: 2015-03-31
    Description: In response to adenosine 5'-diphosphate, the P2Y1 receptor (P2Y1R) facilitates platelet aggregation, and thus serves as an important antithrombotic drug target. Here we report the crystal structures of the human P2Y1R in complex with a nucleotide antagonist MRS2500 at 2.7 A resolution, and with a non-nucleotide antagonist BPTU at 2.2 A resolution. The structures reveal two distinct ligand-binding sites, providing atomic details of P2Y1R's unique ligand-binding modes. MRS2500 recognizes a binding site within the seven transmembrane bundle of P2Y1R, which is different in shape and location from the nucleotide binding site in the previously determined structure of P2Y12R, representative of another P2YR subfamily. BPTU binds to an allosteric pocket on the external receptor interface with the lipid bilayer, making it the first structurally characterized selective G-protein-coupled receptor (GPCR) ligand located entirely outside of the helical bundle. These high-resolution insights into P2Y1R should enable discovery of new orthosteric and allosteric antithrombotic drugs with reduced adverse effects.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4408927/" 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/PMC4408927/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Dandan -- Gao, Zhan-Guo -- Zhang, Kaihua -- Kiselev, Evgeny -- Crane, Steven -- Wang, Jiang -- Paoletta, Silvia -- Yi, Cuiying -- Ma, Limin -- Zhang, Wenru -- Han, Gye Won -- Liu, Hong -- Cherezov, Vadim -- Katritch, Vsevolod -- Jiang, Hualiang -- Stevens, Raymond C -- Jacobson, Kenneth A -- Zhao, Qiang -- Wu, Beili -- U54 GM094618/GM/NIGMS NIH HHS/ -- U54GM094618/GM/NIGMS NIH HHS/ -- Z01 DK031116-21/Intramural NIH HHS/ -- Z01DK031116-26/DK/NIDDK NIH HHS/ -- ZIA DK031116-26/Intramural NIH HHS/ -- England -- Nature. 2015 Apr 16;520(7547):317-21. doi: 10.1038/nature14287. Epub 2015 Mar 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai 201203, China. ; Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA. ; Bridge Institute, Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA. ; Bridge Institute, Department of Biological Sciences, University of Southern California, Los Angeles, California 90089, USA. ; Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai 201203, China. ; 1] Bridge Institute, Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA [2] Bridge Institute, Department of Biological Sciences, University of Southern California, Los Angeles, California 90089, USA [3] iHuman Institute, ShanghaiTech University, 99 Haike Road, Pudong, Shanghai 201203, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25822790" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Diphosphate/analogs & derivatives/chemistry/metabolism ; Binding Sites ; Crystallography, X-Ray ; Deoxyadenine Nucleotides/*chemistry/*metabolism/pharmacology ; Humans ; Ligands ; Models, Molecular ; Molecular Conformation ; Purinergic P2Y Receptor Antagonists/*chemistry/metabolism/pharmacology ; Receptors, Purinergic P2Y1/*chemistry/*metabolism ; Thionucleotides/chemistry/metabolism ; Uracil/*analogs & derivatives/chemistry/metabolism/pharmacology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 6
    Publication Date: 2003-11-01
    Description: We describe a new molecular class of genetic-pairing system that has a native DNA backbone but has all four base pairs replaced by new, larger pairs. The base pairs include size-expanded analogs of thymine and of adenine, both extended by the width of a benzene ring (2.4 A). The expanded-diameter double helices are more thermodynamically stable than the Watson-Crick helix, likely because of enhanced base stacking. Structural data confirm a right-handed, double-stranded, and base-paired helical form. Because of the larger base size, all the pairs of this helical system are fluorescent, which suggests practical applications in detection of natural DNA and RNA. Our findings establish that there is no apparent structural or thermodynamic prohibition against genetic systems having sizes different from the natural one.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, Haibo -- Gao, Jianmin -- Lynch, Stephen R -- Saito, Y David -- Maynard, Lystranne -- Kool, Eric T -- GM52956/GM/NIGMS NIH HHS/ -- GM63587/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2003 Oct 31;302(5646):868-71.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, Stanford University, Stanford, CA 94305-5080, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14593180" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine/*analogs & derivatives/chemistry ; *Base Pairing ; Base Sequence ; Benzene/chemistry ; Circular Dichroism ; Hydrogen Bonding ; Models, Molecular ; Nuclear Magnetic Resonance, Biomolecular ; *Nucleic Acid Conformation ; Nucleic Acid Denaturation ; Nucleic Acid Hybridization ; Oligodeoxyribonucleotides/*chemistry ; Temperature ; Thermodynamics ; Thymine/*analogs & derivatives/chemistry
    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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  • 7
    Publication Date: 2014-01-10
    Description: The human immunodeficiency virus (HIV)-1 protein Vif has a central role in the neutralization of host innate defences by hijacking cellular proteasomal degradation pathways to subvert the antiviral activity of host restriction factors; however, the underlying mechanism by which Vif achieves this remains unclear. Here we report a crystal structure of the Vif-CBF-beta-CUL5-ELOB-ELOC complex. The structure reveals that Vif, by means of two domains, organizes formation of the pentameric complex by interacting with CBF-beta, CUL5 and ELOC. The larger domain (alpha/beta domain) of Vif binds to the same side of CBF-beta as RUNX1, indicating that Vif and RUNX1 are exclusive for CBF-beta binding. Interactions of the smaller domain (alpha-domain) of Vif with ELOC and CUL5 are cooperative and mimic those of SOCS2 with the latter two proteins. A unique zinc-finger motif of Vif, which is located between the two Vif domains, makes no contacts with the other proteins but stabilizes the conformation of the alpha-domain, which may be important for Vif-CUL5 interaction. Together, our data reveal the structural basis for Vif hijacking of the CBF-beta and CUL5 E3 ligase complex, laying a foundation for rational design of novel anti-HIV drugs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guo, Yingying -- Dong, Liyong -- Qiu, Xiaolin -- Wang, Yishu -- Zhang, Bailing -- Liu, Hongnan -- Yu, You -- Zang, Yi -- Yang, Maojun -- Huang, Zhiwei -- England -- Nature. 2014 Jan 9;505(7482):229-33. doi: 10.1038/nature12884.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] School of Life Science and Technology, Harbin Institute of Technology, Harbin 150080, China [2]. ; School of Life Science and Technology, Harbin Institute of Technology, Harbin 150080, China. ; MOE Key Laboratory of Protein Sciences, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24402281" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Core Binding Factor Alpha 2 Subunit/metabolism ; Core Binding Factor beta Subunit/*chemistry/*metabolism ; Crystallography, X-Ray ; Cullin Proteins/*chemistry/*metabolism ; Humans ; Models, Molecular ; Molecular Sequence Data ; Multiprotein Complexes/chemistry/metabolism ; Protein Binding ; Protein Stability ; Protein Structure, Tertiary ; Suppressor of Cytokine Signaling Proteins ; Transcription Factors/chemistry/metabolism ; vif Gene Products, Human Immunodeficiency Virus/*chemistry/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 2010-08-28
    Description: Construction of a complex virus may involve a hierarchy of assembly elements. Here, we report the structure of the whole human adenovirus virion at 3.6 angstroms resolution by cryo-electron microscopy (cryo-EM), revealing in situ atomic models of three minor capsid proteins (IIIa, VIII, and IX), extensions of the (penton base and hexon) major capsid proteins, and interactions within three protein-protein networks. One network is mediated by protein IIIa at the vertices, within group-of-six (GOS) tiles--a penton base and its five surrounding hexons. Another is mediated by ropes (protein IX) that lash hexons together to form group-of-nine (GON) tiles and bind GONs to GONs. The third, mediated by IIIa and VIII, binds each GOS to five surrounding GONs. Optimization of adenovirus for cancer and gene therapy could target these networks.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3412078/" 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/PMC3412078/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, Hongrong -- Jin, Lei -- Koh, Sok Boon S -- Atanasov, Ivo -- Schein, Stan -- Wu, Lily -- Zhou, Z Hong -- 1S10RR23057/RR/NCRR NIH HHS/ -- AI069015/AI/NIAID NIH HHS/ -- CA101904/CA/NCI NIH HHS/ -- GM071940/GM/NIGMS NIH HHS/ -- R01 AI069015/AI/NIAID NIH HHS/ -- R01 CA101904/CA/NCI NIH HHS/ -- R01 GM071940/GM/NIGMS NIH HHS/ -- S10 RR023057/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2010 Aug 27;329(5995):1038-43. doi: 10.1126/science.1187433.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles (UCLA), Los Angeles, CA 90095-7364, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20798312" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoviruses, Human/*chemistry/genetics/metabolism/*ultrastructure ; Capsid/chemistry/ultrastructure ; Capsid Proteins/*chemistry/metabolism/ultrastructure ; Cryoelectron Microscopy ; Genome, Viral ; Image Processing, Computer-Assisted ; Models, Molecular ; Protein Binding ; Protein Conformation ; Protein Interaction Domains and Motifs ; Protein Multimerization ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Virion/chemistry/ultrastructure
    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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  • 9
    Publication Date: 2017-09-12
    Description: Author(s): K. Tanaka, J. S. Tse, and H. Liu The mechanisms for strong electron-phonon coupling predicted for hydrogen-rich alloys with high superconducting critical temperature ( T c ) are examined within the Migdal-Eliashberg theory. Analysis of the functional derivative of T c with respect to the electron-phonon spectral function shows that at ... [Phys. Rev. B 96, 100502(R)] Published Mon Sep 11, 2017
    Keywords: Superfluidity and superconductivity
    Print ISSN: 1098-0121
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  • 10
    Publication Date: 2016-04-21
    Description: The CRISPR-Cas systems, as exemplified by CRISPR-Cas9, are RNA-guided adaptive immune systems used by bacteria and archaea to defend against viral infection. The CRISPR-Cpf1 system, a new class 2 CRISPR-Cas system, mediates robust DNA interference in human cells. Although functionally conserved, Cpf1 and Cas9 differ in many aspects including their guide RNAs and substrate specificity. Here we report the 2.38 A crystal structure of the CRISPR RNA (crRNA)-bound Lachnospiraceae bacterium ND2006 Cpf1 (LbCpf1). LbCpf1 has a triangle-shaped architecture with a large positively charged channel at the centre. Recognized by the oligonucleotide-binding domain of LbCpf1, the crRNA adopts a highly distorted conformation stabilized by extensive intramolecular interactions and the (Mg(H2O)6)(2+) ion. The oligonucleotide-binding domain also harbours a looped-out helical domain that is important for LbCpf1 substrate binding. Binding of crRNA or crRNA lacking the guide sequence induces marked conformational changes but no oligomerization of LbCpf1. Our study reveals the crRNA recognition mechanism and provides insight into crRNA-guided substrate binding of LbCpf1, establishing a framework for engineering LbCpf1 to improve its efficiency and specificity for genome editing.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dong, De -- Ren, Kuan -- Qiu, Xiaolin -- Zheng, Jianlin -- Guo, Minghui -- Guan, Xiaoyu -- Liu, Hongnan -- Li, Ningning -- Zhang, Bailing -- Yang, Daijun -- Ma, Chuang -- Wang, Shuo -- Wu, Dan -- Ma, Yunfeng -- Fan, Shilong -- Wang, Jiawei -- Gao, Ning -- Huang, Zhiwei -- England -- Nature. 2016 Apr 28;532(7600):522-6. doi: 10.1038/nature17944. Epub 2016 Apr 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Life Science and Technology, Harbin Institute of Technology, Harbin 150080, China. ; Ministry of Education Key Laboratory of Protein Sciences, Center for Structural Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27096363" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Proteins/*chemistry/*metabolism ; CRISPR-Associated Proteins/*chemistry/*metabolism ; CRISPR-Cas Systems ; Clustered Regularly Interspaced Short Palindromic Repeats/*genetics ; Crystallography, X-Ray ; Firmicutes/*enzymology ; Genetic Engineering ; Models, Molecular ; Nucleic Acid Conformation ; Protein Binding ; Protein Structure, Tertiary ; RNA Stability ; RNA, Bacterial/*chemistry/genetics/*metabolism ; RNA, Guide/chemistry/genetics/metabolism ; Substrate Specificity
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    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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