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  • 11
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    Type VII collagen is required for Ras-driven human epidermal tumorigenesis (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-03-19
    Description: Type VII collagen defects cause recessive dystrophic epidermolysis bullosa (RDEB), a blistering skin disorder often accompanied by epidermal cancers. To study the role of collagen VII in these cancers, we examined Ras-driven tumorigenesis in RDEB keratinocytes. Cells devoid of collagen VII did not form tumors in mice, whereas those retaining a specific collagen VII fragment (the amino-terminal noncollagenous domain NC1) were tumorigenic. Forced NC1 expression restored tumorigenicity to collagen VII-null epidermis in a non-cell-autonomous fashion. Fibronectin-like sequences within NC1 (FNC1) promoted tumor cell invasion in a laminin 5-dependent manner and were required for tumorigenesis. Tumor-stroma interactions mediated by collagen VII thus promote neoplasia, and retention of NC1 sequences in a subset of RDEB patients may contribute to their increased susceptibility to squamous cell carcinoma.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ortiz-Urda, Susana -- Garcia, John -- Green, Cheryl L -- Chen, Lei -- Lin, Qun -- Veitch, Dallas P -- Sakai, Lynn Y -- Lee, Hyangkyu -- Marinkovich, M Peter -- Khavari, Paul A -- AR43799/AR/NIAMS NIH HHS/ -- AR44012/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 2005 Mar 18;307(5716):1773-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉VA Palo Alto Healthcare System, Palo Alto, CA 94304, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15774758" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Animals ; Antibodies/immunology ; Apoptosis ; Carcinoma, Squamous Cell/etiology/*physiopathology ; Cell Adhesion Molecules/immunology/metabolism ; Cell Proliferation ; Cell Transformation, Neoplastic ; Child ; Collagen Type VII/chemistry/*genetics/immunology/*physiology ; Disease Susceptibility ; Epidermolysis Bullosa Dystrophica/complications/*genetics/metabolism/pathology ; Female ; *Genes, ras ; Humans ; I-kappa B Proteins/genetics/metabolism ; Keratinocytes/*metabolism/pathology ; Male ; Mice ; Mice, SCID ; Middle Aged ; Mutation ; Neoplasm Invasiveness ; Protein Structure, Tertiary ; Skin Neoplasms/etiology/pathology/*physiopathology
    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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  • 12
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    Nod2 mutation in Crohn's disease potentiates NF-kappaB activity and IL-1beta processing (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-02-05
    Description: Variants of NOD2, an intracellular sensor of bacteria-derived muramyl dipeptide (MDP), increase susceptibility to Crohn's disease (CD). These variants are thought to be defective in activation of nuclear factor kappaB (NF-kappaB) and antibacterial defenses, but CD clinical specimens display elevated NF-kappaB activity. To illuminate the pathophysiological function of NOD2, we introduced such a variant to the mouse Nod2 locus. Mutant mice exhibited elevated NF-kappaB activation in response to MDP and more efficient processing and secretion of the cytokine interleukin-1beta (IL-1beta). These effects are linked to increased susceptibility to bacterial-induced intestinal inflammation and identify NOD2 as a positive regulator of NF-kappaB activation and IL-1beta secretion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maeda, Shin -- Hsu, Li-Chung -- Liu, Hongjun -- Bankston, Laurie A -- Iimura, Mitsutoshi -- Kagnoff, Martin F -- Eckmann, Lars -- Karin, Michael -- AI43477/AI/NIAID NIH HHS/ -- AI56075/AI/NIAID NIH HHS/ -- DK07202/DK/NIDDK NIH HHS/ -- DK35108/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2005 Feb 4;307(5710):734-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0723, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15692052" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylmuramyl-Alanyl-Isoglutamine/immunology ; Animals ; Anti-Bacterial Agents/pharmacology ; Apoptosis ; Bacteria/immunology ; Cells, Cultured ; Colitis/immunology/pathology ; Colon/*immunology/microbiology ; Crohn Disease/genetics/*immunology ; Cytokines/biosynthesis/genetics ; Dextran Sulfate/pharmacology ; Interleukin-1/*metabolism ; Intestinal Mucosa/immunology ; Intracellular Signaling Peptides and Proteins/*genetics/*physiology ; Lipopolysaccharides/immunology ; Macrophage Activation ; Macrophages/*immunology/metabolism ; Mice ; Mutation ; NF-kappa B/*metabolism ; Nod2 Signaling Adaptor Protein ; Peptidoglycan/immunology ; Signal Transduction
    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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  • 13
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    Variable control of Ets-1 DNA binding by multiple phosphates in an unstructured region (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-07-05
    Description: Cell signaling that culminates in posttranslational modifications directs protein activity. Here we report how multiple Ca2+-dependent phosphorylation sites within the transcription activator Ets-1 act additively to produce graded DNA binding affinity. Nuclear magnetic resonance spectroscopic analyses show that phosphorylation shifts Ets-1 from a dynamic conformation poised to bind DNA to a well-folded inhibited state. These phosphates lie in an unstructured flexible region that functions as the allosteric effector of autoinhibition. Variable phosphorylation thus serves as a "rheostat" for cell signaling to fine-tune transcription at the level of DNA binding.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pufall, Miles A -- Lee, Gregory M -- Nelson, Mary L -- Kang, Hyun-Seo -- Velyvis, Algirdas -- Kay, Lewis E -- McIntosh, Lawrence P -- Graves, Barbara J -- GM08537/GM/NIGMS NIH HHS/ -- P01-CA24014/CA/NCI NIH HHS/ -- R01 GM38663/GM/NIGMS NIH HHS/ -- T32-CA93247/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2005 Jul 1;309(5731):142-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Huntsman Cancer Institute, Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112-5550, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15994560" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Amino Acid Sequence ; Amino Acid Substitution ; Animals ; Calcium-Calmodulin-Dependent Protein Kinase Type 2 ; Calcium-Calmodulin-Dependent Protein Kinases/metabolism ; DNA/*metabolism ; Hydrophobic and Hydrophilic Interactions ; Mice ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Nuclear Magnetic Resonance, Biomolecular ; Phosphorylation ; Protein Binding ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Proto-Oncogene Protein c-ets-1 ; Proto-Oncogene Proteins/*chemistry/genetics/*metabolism ; Proto-Oncogene Proteins c-ets ; Signal Transduction ; Transcription Factors/*chemistry/genetics/*metabolism
    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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  • 14
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    Genetic code supports targeted insertion of two amino acids by one codon (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-01-10
    Description: Strict one-to-one correspondence between codons and amino acids is thought to be an essential feature of the genetic code. However, we report that one codon can code for two different amino acids with the choice of the inserted amino acid determined by a specific 3' untranslated region structure and location of the dual-function codon within the messenger RNA (mRNA). We found that the codon UGA specifies insertion of selenocysteine and cysteine in the ciliate Euplotes crassus, that the dual use of this codon can occur even within the same gene, and that the structural arrangements of Euplotes mRNA preserve location-dependent dual function of UGA when expressed in mammalian cells. Thus, the genetic code supports the use of one codon to code for multiple amino acids.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3088105/" 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/PMC3088105/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Turanov, Anton A -- Lobanov, Alexey V -- Fomenko, Dmitri E -- Morrison, Hilary G -- Sogin, Mitchell L -- Klobutcher, Lawrence A -- Hatfield, Dolph L -- Gladyshev, Vadim N -- AI058054/AI/NIAID NIH HHS/ -- GM061603/GM/NIGMS NIH HHS/ -- GM065204/GM/NIGMS NIH HHS/ -- R01 GM061603/GM/NIGMS NIH HHS/ -- R01 GM061603-04S2/GM/NIGMS NIH HHS/ -- ZIA BC010767-03/Intramural NIH HHS/ -- New York, N.Y. -- Science. 2009 Jan 9;323(5911):259-61. doi: 10.1126/science.1164748.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Redox Biology Center, University of Nebraska, Lincoln, NE 68588, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19131629" target="_blank"〉PubMed〈/a〉
    Keywords: 3' Untranslated Regions ; Amino Acid Sequence ; Animals ; Base Sequence ; Cell Line ; Codon/*genetics ; Codon, Terminator/*genetics ; Cysteine/*genetics/metabolism ; Euplotes/chemistry/*genetics ; *Genetic Code ; Humans ; Molecular Sequence Data ; Mutation ; Protozoan Proteins/biosynthesis/chemistry/genetics ; RNA, Protozoan/genetics/metabolism ; RNA, Transfer, Amino Acid-Specific/chemistry/genetics ; RNA, Transfer, Cys/chemistry/genetics ; Recombinant Fusion Proteins/metabolism ; Selenocysteine/*genetics/metabolism ; Selenoproteins/biosynthesis/chemistry/*genetics
    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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  • 15
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    Model Development and Testing for THEMIS Controlled Mars Mosaics (2005)
    In:  CASI
    Details
    Publication Date: 2019-08-17
    Description: As part of our work [1] to develop techniques and procedures to create regional and eventually global THEMIS mosaics of Mars, we are developing algorithms and software to photogrammetrically control THEMIS IR line scanner camera images. We have found from comparison of a limited number of images to MOLA digital image models (DIMs) [2] that the a priori geometry information (i.e. SPICE [3]) for THEMIS images generally allows their relative positions to be specified at the several pixel level (e.g. approx.5 to 13 pixels). However a need for controlled solutions to improve this geometry to the sub-pixel level still exists. Only with such solutions can seamless mosaics be obtained and likely distortion from spacecraft motion during image collection removed at such levels. Past experience has shown clearly that such mosaics are in heavy demand by users for operational and scientific use, and that they are needed over large areas or globally (as opposed to being available only on a limited basis via labor intensive custom mapping projects). Uses include spacecraft navigation, landing site planning and mapping, registration of multiple data types and image sets, registration of multispectral images, registration of images with topographic information, recovery of thermal properties, change detection searches, etc.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Lunar and Planetary Science XXXVI, Part 1; LPI-Contrib-1234-Pt-1
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  • 16
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    Characterization and Petrologic Interpretation of Olivine-Rich Basalts at Gusev Crater, Mars (2006)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: Rocks on the floor of Gusev crater are basalts of uniform composition and mineralogy. Olivine, the only mineral to have been identified or inferred from data by all instruments on the Spirit rover, is especially abundant in these rocks. These picritic basalts are similar in many respects to certain Martian meteorites (olivine-phyric shergottites). The olivine megacrysts in both have intermediate compositions, with modal abundances ranging up to 20-30%. Associated minerals in both include low-calcium and high-calcium pyroxenes, plagioclase of intermediate composition, iron-titanium-chromium oxides, and phosphate. These rocks also share minor element trends, reflected in their nickel-magnesium and chromium-magnesium ratios. Gusev basalts and shergottites appear to have formed from primitive magmas produced by melting an undepleted mantle at depth and erupted without significant fractionation. However, apparent differences between Gusev rocks and shergottites in their ages, plagioclase abundances, and volatile contents preclude direct correlation. Orbital determinations of global olivine distribution and compositions by thermal emission spectroscopy suggest that olivine-rich rocks may be widespread. Because weathering under acidic conditions preferentially attacks olivine and disguises such rocks beneath alteration rinds, picritic basalts formed from primitive magmas may even be a common component of the Martian crust formed during ancient and recent times.
    Keywords: Lunar and Planetary Science and Exploration
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    NASA TECHNICAL REPORTS
  • 17
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    Petrography of Lunar Meteorite MET 01210, A New Basaltic Regolith Breccia (2005)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: Lunar meteorite MET 01210 (hereafter referred to as MET) is a 22.8 g breccia collected during the 2001 field season in the Meteorite Hills, Antarctica. Although initially classified as an anorthositic breccia, MET is a regolith breccia composed predominantly of very-low-Ti (VLT) basaltic material. Four other brecciated lunar meteorites (NWA 773, QUE 94281, EET 87/96, Yamato 79/98) with a significant VLT basaltic component have been identified. We present here the petrography and bulk major element composition of MET and compare it to previously studied basaltic lunar meteorite breccias.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Lunar and Planetary Science XXXVI, Part 22; LPI-Contrib-1234-Pt-22
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  • 18
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    Ethane Ices in the Outer Solar System: Spectroscopy and Chemistry (2009)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: We report recent experiments on ethane ices made at temperatures applicable to the outer Solar System. New near- and mid-infrared data for crystalline and amorphous ethane, including new spectra for a seldom-studied solid phase that exists at 35-55 K, are presented along with radiation-chemical experiments showing the formation of more-complex hydrocarbons
    Keywords: Lunar and Planetary Science and Exploration
    Type: Icarus (ISSN 0019-1035); 203; 2; 677-680
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  • 19
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    Microsat and Lunar-Based Imaging of Radio Bursts (2005)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: No present or approved spacecraft mission has the capability to provide high angular resolution imaging of solar or magnetospheric radio bursts or of the celestial sphere at frequencies below the ionospheric cutoff. Here, we describe a MIDEX-class mission to perform such imaging in the frequency range approx. 30 kHz to 15 MHz. This mission, the Solar Imaging Radio Array (SIRA), is solar and exploration-oriented, with emphasis on improved understanding and application of radio bursts associated with solar energetic particle (SEP) events and on tracking shocks and other components of coronal mass ejections (CMEs). SIRA will require 12 to 16 micro-satellites to establish a sufficient number of baselines with separations on the order of kilometers. The constellation consists of microsats located quasi-randomly on a spherical shell, initially of approx. 10 km diameter. The baseline microsat is 3-axis stabilized with body-mounted solar arrays and an articulated, earth pointing high gain antenna. The constellation will likely be placed at L1, which is the preferred location for full-time solar observations. We also discuss briefly follow-on missions that would be lunar-based with of order 10,000 dipole antennas.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Planetary Radion Emissions 6th; Apr 20, 2005 - Apr 22, 2005; Graz; Austria
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  • 20
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    Crystal structure of the anti-viral APOBEC3G catalytic domain and functional implications (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-10-14
    Description: The APOBEC family members are involved in diverse biological functions. APOBEC3G restricts the replication of human immunodeficiency virus (HIV), hepatitis B virus and retroelements by cytidine deamination on single-stranded DNA or by RNA binding. Here we report the high-resolution crystal structure of the carboxy-terminal deaminase domain of APOBEC3G (APOBEC3G-CD2) purified from Escherichia coli. The APOBEC3G-CD2 structure has a five-stranded beta-sheet core that is common to all known deaminase structures and closely resembles the structure of another APOBEC protein, APOBEC2 (ref. 5). A comparison of APOBEC3G-CD2 with other deaminase structures shows a structural conservation of the active-site loops that are directly involved in substrate binding. In the X-ray structure, these APOBEC3G active-site loops form a continuous 'substrate groove' around the active centre. The orientation of this putative substrate groove differs markedly (by 90 degrees) from the groove predicted by the NMR structure. We have introduced mutations around the groove, and have identified residues involved in substrate specificity, single-stranded DNA binding and deaminase activity. These results provide a basis for understanding the underlying mechanisms of substrate specificity for the APOBEC family.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2714533/" 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/PMC2714533/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, Lauren G -- Prochnow, Courtney -- Chang, Y Paul -- Bransteitter, Ronda -- Chelico, Linda -- Sen, Udayaditya -- Stevens, Raymond C -- Goodman, Myron F -- Chen, Xiaojiang S -- R01 AI055926/AI/NIAID NIH HHS/ -- R01 AI055926-05/AI/NIAID NIH HHS/ -- England -- Nature. 2008 Nov 6;456(7218):121-4. doi: 10.1038/nature07357. Epub 2008 Oct 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular and Computational Biology, University of Southern California, Los Angeles, California 90089, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18849968" target="_blank"〉PubMed〈/a〉
    Keywords: Antiviral Agents ; *Catalytic Domain ; Crystallography, X-Ray ; Cytidine Deaminase/*chemistry/genetics/isolation & purification/*metabolism ; DNA, Single-Stranded/metabolism ; Escherichia coli ; Humans ; Models, Molecular ; Muscle Proteins/chemistry ; Mutant Proteins/chemistry/genetics/metabolism ; Mutation ; Nuclear Magnetic Resonance, Biomolecular ; Protein Structure, Secondary ; Structural Homology, Protein ; Structure-Activity Relationship ; Substrate Specificity
    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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