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  • Lignin biodegradation  (2)
  • 15N balance  (1)
  • Antibodies, Antinuclear/blood  (1)
  • 1
    Publikationsdatum: 2010-06-18
    Beschreibung: Sialic acid acetylesterase (SIAE) is an enzyme that negatively regulates B lymphocyte antigen receptor signalling and is required for the maintenance of immunological tolerance in mice. Heterozygous loss-of-function germline rare variants and a homozygous defective polymorphic variant of SIAE were identified in 24/923 subjects of European origin with relatively common autoimmune disorders and in 2/648 controls of European origin. All heterozygous loss-of-function SIAE mutations tested were capable of functioning in a dominant negative manner. A homozygous secretion-defective polymorphic variant of SIAE was catalytically active, lacked the ability to function in a dominant negative manner, and was seen in eight autoimmune subjects but in no control subjects. The odds ratio for inheriting defective SIAE alleles was 8.6 in all autoimmune subjects, 8.3 in subjects with rheumatoid arthritis, and 7.9 in subjects with type I diabetes. Functionally defective SIAE rare and polymorphic variants represent a strong genetic link to susceptibility in relatively common human autoimmune disorders.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2900412/" 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/PMC2900412/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Surolia, Ira -- Pirnie, Stephan P -- Chellappa, Vasant -- Taylor, Kendra N -- Cariappa, Annaiah -- Moya, Jesse -- Liu, Haoyuan -- Bell, Daphne W -- Driscoll, David R -- Diederichs, Sven -- Haider, Khaleda -- Netravali, Ilka -- Le, Sheila -- Elia, Roberto -- Dow, Ethan -- Lee, Annette -- Freudenberg, Jan -- De Jager, Philip L -- Chretien, Yves -- Varki, Ajit -- MacDonald, Marcy E -- Gillis, Tammy -- Behrens, Timothy W -- Bloch, Donald -- Collier, Deborah -- Korzenik, Joshua -- Podolsky, Daniel K -- Hafler, David -- Murali, Mandakolathur -- Sands, Bruce -- Stone, John H -- Gregersen, Peter K -- Pillai, Shiv -- AI 064930/AI/NIAID NIH HHS/ -- AI 068759/AI/NIAID NIH HHS/ -- AI 076505/AI/NIAID NIH HHS/ -- AR 022263/AR/NIAMS NIH HHS/ -- AR 044422/AR/NIAMS NIH HHS/ -- AR 058481/AR/NIAMS NIH HHS/ -- NS 32765/NS/NINDS NIH HHS/ -- P30 DK043351/DK/NIDDK NIH HHS/ -- R01 AI064930/AI/NIAID NIH HHS/ -- R01 AI064930-04/AI/NIAID NIH HHS/ -- R01 AI068759/AI/NIAID NIH HHS/ -- R01 AI068759-05/AI/NIAID NIH HHS/ -- R01 AI076505/AI/NIAID NIH HHS/ -- R01 AI076505-02/AI/NIAID NIH HHS/ -- R01 AR044422/AR/NIAMS NIH HHS/ -- R01 AR044422-13/AR/NIAMS NIH HHS/ -- RC1 AR058481/AR/NIAMS NIH HHS/ -- RC1 AR058481-01/AR/NIAMS NIH HHS/ -- England -- Nature. 2010 Jul 8;466(7303):243-7. doi: 10.1038/nature09115. Epub 2010 Jun 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cancer Center, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20555325" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acetylation ; Acetylesterase/*genetics/metabolism/secretion ; Alleles ; Animals ; Antibodies, Antinuclear/blood ; Arthritis, Rheumatoid/enzymology/genetics ; Autoimmune Diseases/*enzymology/*genetics ; Autoimmunity/*genetics ; B-Lymphocytes/metabolism ; Biocatalysis ; Carboxylic Ester Hydrolases/*genetics/metabolism/secretion ; Case-Control Studies ; Cell Line ; Diabetes Mellitus, Type 1/enzymology/genetics ; Europe/ethnology ; Exons/genetics ; Genetic Predisposition to Disease/*genetics ; Germ-Line Mutation/*genetics ; Humans ; Mice ; N-Acetylneuraminic Acid/*metabolism ; Odds Ratio ; Polymorphism, Single Nucleotide/genetics ; Sample Size ; Sequence Analysis, DNA
    Print ISSN: 0028-0836
    Digitale ISSN: 1476-4687
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    ISSN: 1432-0789
    Schlagwort(e): Phytotron study ; Corn plants ; Denitrification ; 15N balance ; N2 flux by 15N method ; N2O flux by gas chromatography
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Geologie und Paläontologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Containers filled with soil mixed with potassium nitrate highly enriched in 15N were planted with corn (Zea mays L.) and kept in a phytotron under controlled conditions for 79 days. Soil water content was normally maintained at exactly 60% water-holding capacity (−33 kPa), but it was increased several times to 85% (−5 kPa) for short periods to favour denitrification. The soil headspace was sealed from the phytotron atmosphere and aerated by a continuous stream of air. Nitrous oxide emission was measured by estimating the N2O concentration differences in the air entering and leaving the containers. Emission of N2 was estimated by mass spectroscopy from changes in the N2 composition in the temporarily enclosed soil headspace. Both methods were carefully checked for accuracy by different tests. At specific times during the experiment the distribution of 15N between plants and soil was determined and a 15N balance established. Emission of N gases peaked at times of increased water content and reached maxima of 149 and 142 μg N pot−1 day−1 for N2O and N2, respectively. While N losses of 5% ± 2% were indicated by the 15N balance, only 1.1% ± 0.3% loss from 2.7 g applied N was estimated from the N2O and N2 measurements after 79 days. Possible reasons for these differences are discussed.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Archives of microbiology 119 (1978), S. 103-106 
    ISSN: 1432-072X
    Schlagwort(e): Lignin biodegradation ; Bacteria ; Nocardia spp. ; Pseudomonas spp.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Several Nocardia and Pseudomonas spp., as well as some unidentified bacteria, isolated from lake water containing high loads of waste lignin, were tested for their capacity to release 14CO2 from specifically 14C-labelled dehydropolymer of coniferyl alcohol (DHP) or corn stalk lignins. The bacteria were selected according to their ability to degrade phenolic compounds. However, only some of them could release significant amounts of 14CO2 from the labelled lignin. The tested Nocardia spp. were more active than the Pseudomonas spp. and the unidentified bacteria. The most active strains belonged to N. autotrophica. These strains released CO2 significantly from the methoxyl group and transformed the other carbons from the phenylpropane skeleton of lignin also into CO2. Other less demethylating strains also released little CO2 from the other carbons of the lignin molecule. From corn stalk materials which were specifically labelled in the lignin part only small amounts of labelled CO2 were released.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Archives of microbiology 114 (1977), S. 149-153 
    ISSN: 1432-072X
    Schlagwort(e): Lignin biodegradation ; Soil bacterium ; Nocardia sp. ; Phenol degradation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A Gram-positive bacterium which was isolated from a Finnish soil and identified as a Nocardia sp., was able to decompose lignin and to assimilate lignin degradation products as a carbon source. It could release 14CO2 from 14C-labelled methoxyl groups, side chains or ring carbons of coniferyl alcohol dehydropolymers (DHP) and from specifically 14C-labelled lignin of plant material. Furthermore, it could release 14CO2 from phenolcarboxylic and cinnamic acids and alcohols labelled in the OCH3, COOH groups, side chain or aromatic ring carbons.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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