-Methylmethionine Plays a Major Role in Phloem Sulfur Transport and Is Synthesized by a Novel Type of Methyltransferase
نویسندگان
چکیده
Fabienne Bourgis, a Sanja Roje, a Michael L. Nuccio, a Donald B. Fisher, b Mitchell C. Tarczynski, c Changjiang Li, c Cornelia Herschbach, d Heinz Rennenberg, d Maria Joao Pimenta, e Tun-Li Shen, f Douglas A. Gage, f and Andrew D. Hanson a,1 a Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611-0690 b Botany Department, Washington State University, Pullman, Washington 99164-4238 c Pioneer Hi-Bred International, 7300 N.W. 62nd Avenue, Johnston, Iowa 50131-1004 d Institut für Forstbotanik und Baumphysiologie, Albert-Ludwigs-Universität, D-79085 Freiburg, Germany e Frontier Research Program, Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan f Biochemistry Department, Michigan State University, East Lansing, Michigan 48824-1319
منابع مشابه
S-methylmethionine plays a major role in phloem sulfur transport and is synthesized by a novel type of methyltransferase.
All flowering plants produce S-methylmethionine (SMM) from Met and have a separate mechanism to convert SMM back to Met. The functions of SMM and the reasons for its interconversion with Met are not known. In this study, by using the aphid stylet collection method together with mass spectral and radiolabeling analyses, we established that l-SMM is a major constituent of the phloem sap moving to...
متن کاملIncreased phloem transport of S-methylmethionine positively affects sulfur and nitrogen metabolism and seed development in pea plants.
Seeds of grain legumes are important energy and food sources for humans and animals. However, the yield and quality of legume seeds are limited by the amount of sulfur (S) partitioned to the seeds. The amino acid S-methylmethionine (SMM), a methionine derivative, has been proposed to be an important long-distance transport form of reduced S, and we analyzed whether SMM phloem loading and source...
متن کاملComparative metabolite profiling of foxglove aphids (Aulacorthum solani Kaltenbach) on leaves of resistant and susceptible soybean strains.
Aphid infestations can cause severe decreases in soybean (Glycine max [L.] Merr.) yield. Since planting aphid-resistant soybean strains is a promising approach for pest control, understanding the resistance mechanisms employed by aphids is of considerable importance. We compared aphid resistance in seven soybean strains and found that strain Tohoku149 was the most resistant to the foxglove aphi...
متن کاملInsertional inactivation of the methionine s-methyltransferase gene eliminates the s-methylmethionine cycle and increases the methylation ratio.
Methionine (Met) S-methyltransferase (MMT) catalyzes the synthesis of S-methyl-Met (SMM) from Met and S-adenosyl-Met (Ado-Met). SMM can be reconverted to Met by donating a methyl group to homocysteine (homo-Cys), and concurrent operation of this reaction and that mediated by MMT sets up the SMM cycle. SMM has been hypothesized to be essential as a methyl donor or as a transport form of sulfur, ...
متن کاملA family of S-methylmethionine-dependent thiol/selenol methyltransferases. Role in selenium tolerance and evolutionary relation.
Several plant species can tolerate high concentrations of selenium in the environment, and they accumulate organoselenium compounds. One of these compounds is Se-methylselenocysteine, synthesized by a number of species from the genus Astragalus (Fabaceae), like A. bisulcatus. An enzyme has been previously isolated from this organism that catalyzes methyl transfer from S-adenosylmethionine to se...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1999