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  • Articles  (466)
  • Animals  (466)
  • 1990-1994  (466)
  • 1965-1969
  • 1993  (466)
  • Chemistry and Pharmacology  (466)
  • Mathematics
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  • Articles  (466)
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  • 1990-1994  (466)
  • 1965-1969
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  • 1
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    Sea urchin egg receptor for sperm: sequence similarity of binding domain and hsp70 (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-03-05
    Description: Fertilization depends on cell surface recognition proteins that interact and thereby mediate binding and subsequent fusion of the sperm and egg. Overlapping complementary DNA's encoding the egg plasma membrane receptor for sperm from the sea urchin Strongylocentrotus purpuratus were cloned and sequenced. Analysis of the deduced primary structure suggests that the receptor is a transmembrane protein with a short cytoplasmic domain. This domain showed no sequence similarity to known protein sequences. In contrast, the extracellular, sperm binding domain of the receptor did show sequence similarity to the heat shock protein 70 (hsp70) family of proteins. Recombinant protein representing this portion of the receptor bound to the sperm protein, binding, and also inhibited fertilization in a species-specific manner; beads coated with the protein became specifically bound to acrosome-reacted sperm. These data provide a basis for detailed investigations of molecular interactions that occur in gamete recognition and egg activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Foltz, K R -- Partin, J S -- Lennarz, W J -- HD18590/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1993 Mar 5;259(5100):1421-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, University of California, Santa Barbara 93106.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8383878" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cloning, Molecular ; Female ; Fertilization ; Heat-Shock Proteins/*genetics ; Humans ; Male ; Molecular Sequence Data ; Ovum/physiology ; Receptors, Cell Surface/*genetics/metabolism ; Recombinant Proteins/metabolism ; Restriction Mapping ; Sea Urchins ; Sequence Homology, Amino Acid ; Sperm-Ovum Interactions ; Spermatozoa/cytology/physiology
    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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  • 2
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    Role of intracellular calcium in NI-35-evoked collapse of neuronal growth cones (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-01-01
    Description: A myelin-associated protein from the central nervous system, the neurite growth inhibitor NI-35, inhibits regeneration of lesioned neuronal fiber tracts in vivo and growth of neurites in vitro. Growth cones of cultured rat dorsal root ganglion neurons arrested their growth and collapsed when exposed to liposomes containing NI-35. Before morphological changes, the concentration of free intracellular calcium ([Ca2+]i) showed a rapid and large increase in growth cones exposed to liposomes containing NI-35. Neither an increase in [Ca2+]i nor collapse of growth cones was detected in the presence of antibodies to NI-35. Dantrolene, an inhibitor of calcium release from caffeine-sensitive intracellular calcium stores, protected growth cones from collapse evoked by NI-35. Depletion of these caffeine-sensitive intracellular calcium stores prevented the increase in [Ca2+]i evoked by NI-35. The NI-35-evoked cascade of intracellular messengers that mediates collapse of growth cones includes the crucial step of calcium release from intracellular stores.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bandtlow, C E -- Schmidt, M F -- Hassinger, T D -- Schwab, M E -- Kater, S B -- NS24683/NS/NINDS NIH HHS/ -- NS28323/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1993 Jan 1;259(5091):80-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Brain Research Institute, University of Zurich, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8418499" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caffeine/pharmacology ; Calcium/*metabolism ; Cells, Cultured ; Drug Carriers ; Fura-2 ; Ganglia, Spinal/*physiology ; Growth Inhibitors/*pharmacology ; Kinetics ; Liposomes ; Nerve Fibers/drug effects/*physiology/ultrastructure ; Neurons/drug effects/*physiology/ultrastructure ; Rats
    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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  • 3
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    Transcription factor TFIIB sites important for interaction with promoter-bound TFIID (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-07-23
    Description: Transcription initiation factor TFIIB recruits RNA polymerase II to the promoter subsequent to interaction with a preformed TFIID-promoter complex. The domains of TFIIB required for binding to the TFIID-promoter complex and for transcription initiation have been determined. The carboxyl-terminal two-thirds of TFIIB, which contains two direct repeats and two basic residue repeats, is sufficient for interaction with the TFIID-promoter complex. An extra 84-residue amino-terminal region, with no obvious known structural motifs, is required for basal transcription activity. Basic residues within the second basic repeat of TFIIB are necessary for stable interaction with the TFIID-promoter complex, whereas the basic character of the first basic repeat is not. Functional roles of other potential structural motifs are discussed in light of the present study.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamashita, S -- Hisatake, K -- Kokubo, T -- Doi, K -- Roeder, R G -- Horikoshi, M -- Nakatani, Y -- AI27397/AI/NIAID NIH HHS/ -- CA42567/CA/NCI NIH HHS/ -- GM45258/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1993 Jul 23;261(5120):463-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Institute of Neurological Diseases and Stroke, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8332911" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites ; DNA-Binding Proteins/*metabolism ; Drosophila ; Molecular Sequence Data ; Mutation ; *Promoter Regions, Genetic ; Protein Binding ; Transcription Factor TFIIB ; Transcription Factor TFIID ; Transcription Factors/*chemistry/*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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  • 4
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    Sex, violence, and sociobiology (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-10-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barash, D P -- New York, N.Y. -- Science. 1993 Oct 22;262(5133):491.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8211168" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Child ; Child Abuse ; Female ; Humans ; Male ; *Sexual Behavior ; Sexual Behavior, Animal ; Sociology ; *Violence
    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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  • 5
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    Life history variables preserved in dental cementum microstructure (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-08-27
    Description: The age and season of death of mammals, as well as other aspects of their life history, can be estimated from seasonal bands in dental cementum that result from variations in microstructure. Scanning electron micrographs of goats fed controlled diets demonstrate that cementum bands preserve variations in the relative orientation of collagen fibers that reflect changes in the magnitude and frequency of occlusal forces from chewing different quality diets. Changes in the rate of tissue growth are also reflected in cementum bands as variations in the degree of mineralization.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lieberman, D E -- New York, N.Y. -- Science. 1993 Aug 27;261(5125):1162-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anthropology, Harvard University, Cambridge, MA 02138.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8356448" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Collagen/*analysis ; Dental Cementum/chemistry/*ultrastructure ; *Diet ; Goats/*physiology ; Microscopy, Electron, Scanning ; Seasons
    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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  • 6
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    Cue-invariant shape selectivity of macaque inferior temporal neurons (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-05-14
    Description: The perception of shape is independent of the size and position of the shape and also of the visual cue that defines it. The same shape can be recognized whether defined by a difference in luminance, by motion, or by texture. Experiments showed that the shape selectivity of individual cells in the macaque inferior temporal cortex did not vary with the size and position of a shape and also did not vary with the visual cue used to define the shape. This cue invariance was true for static luminance and texture cues as well as for relative motion cues--that is, for cues that are processed in ventral and dorsal visual pathways. The properties of these inferior temporal cells meet the demands of cue-invariant shape coding.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sary, G -- Vogels, R -- Orban, G A -- New York, N.Y. -- Science. 1993 May 14;260(5110):995-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratorium voor Neuro- en Psychofysiologie, Faculteit der Geneeskunde, Katholieke Universiteit Leuven, Belgium.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8493538" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Form Perception ; Light ; Macaca mulatta ; Male ; Movement ; Neurons/*physiology ; Temporal Lobe/*physiology
    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
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    Rate and mechanism of nonhomologous recombination during a single cycle of retroviral replication (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-01-08
    Description: Oncogenes discovered in retroviruses such as Rous sarcoma virus were generated by transduction of cellular proto-oncogenes into the viral genome. Several different kinds of junctions between the viral and proto-oncogene sequences have been found in different viruses. A system of retrovirus vectors and a protocol that mimicked this transduction during a single cycle of retrovirus replication was developed. The transduction involved the formation of a chimeric viral-cellular RNA, strand switching of the reverse transcription growing point from an infectious retrovirus to the chimeric RNA, and often a subsequent deletion during the rest of viral DNA synthesis. A short region of sequence identity was frequently used for the strand switching. The rate of this process was about 0.1 to 1 percent of the rate of homologous retroviral recombination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, J -- Temin, H M -- CA-07175/CA/NCI NIH HHS/ -- CA-22443/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1993 Jan 8;259(5092):234-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉McArdle Laboratory for Cancer Research, University of Wisconsin-Madison 53706.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8421784" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *Cinnamates ; *DNA Replication ; DNA, Viral/chemistry/genetics ; Drug Resistance/genetics ; Genes, Viral ; Genetic Vectors ; Hygromycin B/analogs & derivatives ; Kinetics ; Mice ; Molecular Sequence Data ; Moloney murine leukemia virus/genetics ; Neomycin ; Plasmids ; *Proto-Oncogenes ; RNA, Viral/analysis/genetics ; *Recombination, Genetic ; Repetitive Sequences, Nucleic Acid ; Retroviridae/*genetics/physiology ; Transfection ; *Virus Replication
    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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  • 8
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    Mutations in the glucose-6-phosphatase gene that cause glycogen storage disease type 1a (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-10-22
    Description: Glycogen storage disease (GSD) type 1a is caused by the deficiency of D-glucose-6-phosphatase (G6Pase), the key enzyme in glucose homeostasis. Despite both a high incidence and morbidity, the molecular mechanisms underlying this deficiency have eluded characterization. In the present study, the molecular and biochemical characterization of the human G6Pase complementary DNA, its gene, and the expressed protein, which is indistinguishable from human microsomal G6Pase, are reported. Several mutations in the G6Pase gene of affected individuals that completely inactivate the enzyme have been identified. These results establish the molecular basis of this disease and open the way for future gene therapy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lei, K J -- Shelly, L L -- Pan, C J -- Sidbury, J B -- Chou, J Y -- New York, N.Y. -- Science. 1993 Oct 22;262(5133):580-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Human Genetics Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8211187" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cell Line ; DNA, Complementary/genetics ; Exons ; Glucose-6-Phosphatase/*genetics/metabolism ; Glycogen Storage Disease Type I/enzymology/*genetics ; Glycosylation ; Humans ; Liver/enzymology ; Mice ; Molecular Sequence Data ; *Mutation ; Protein Conformation ; Transfection
    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
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    Tropical poison frogs (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-11-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Myers, C W -- Daly, J W -- New York, N.Y. -- Science. 1993 Nov 19;262(5137):1193.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8235639" target="_blank"〉PubMed〈/a〉
    Keywords: *Amphibian Venoms ; Animals ; *Animals, Poisonous ; *Anura ; Humans ; Indians, South American
    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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    Expression cloning and signaling properties of the rat glucagon receptor (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-03-12
    Description: Glucagon and the glucagon receptor are a primary source of control over blood glucose concentrations and are especially important to studies of diabetes in which the loss of control over blood glucose concentrations clinically defines the disease. A complementary DNA clone for the glucagon receptor was isolated by an expression cloning strategy, and the receptor protein was expressed in several kidney cell lines. The cloned receptor bound glucagon and caused an increase in the intracellular concentration of adenosine 3', 5'-monophosphate (cAMP). The cloned glucagon receptor also transduced a signal that led to an increased concentration of intracellular calcium. The glucagon receptor is similar to the calcitonin and parathyroid hormone receptors. It can transduce signals leading to the accumulation of two different second messengers, cAMP and calcium.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jelinek, L J -- Lok, S -- Rosenberg, G B -- Smith, R A -- Grant, F J -- Biggs, S -- Bensch, P A -- Kuijper, J L -- Sheppard, P O -- Sprecher, C A -- New York, N.Y. -- Science. 1993 Mar 12;259(5101):1614-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉ZymoGenetics Inc., Seattle, WA 98105.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8384375" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Calcium/pharmacology ; Cell Line ; Cloning, Molecular ; Cricetinae ; Cyclic AMP/metabolism ; Glucagon/metabolism/*pharmacology ; Kidney ; Kinetics ; Liver/*metabolism ; Molecular Sequence Data ; Rats ; Receptors, Gastrointestinal Hormone/genetics/metabolism/*physiology ; Receptors, Glucagon ; *Signal Transduction ; Transfection
    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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