Genetic Manipulation of the Metabolism of Polyamines in Poplar Cells. The Regulation of Putrescine Catabolism
We investigated the catabolism of putrescine (Put) in a non-transgenic (NT) and a transgenic cell line of poplar (Populus nigra × maximowiczii) expressing a mouse (Mus musculus) ornithine (Orn) decarboxylase (odc) cDNA. The transgenic cells produce 3- to 4-fold higher amounts of Put than the NT cell...
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| Veröffentlicht in: | Plant physiology (Bethesda) 2002-04, Vol.128 (4), p.1455-1469 |
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| creator | Pratiksha Bhatnagar Rakesh Minocha Minocha, Subhash C. |
| description | We investigated the catabolism of putrescine (Put) in a non-transgenic (NT) and a transgenic cell line of poplar (Populus nigra × maximowiczii) expressing a mouse (Mus musculus) ornithine (Orn) decarboxylase (odc) cDNA. The transgenic cells produce 3- to 4-fold higher amounts of Put than the NT cells. The rate of loss of Put from the cells and the initial half-life of cellular Put were determined by feeding the cells with [U-14C]Orn and [1,4-14C]Put as precursors and following the loss of [14C]Put in the cells at various times after transfer to label-free medium. The amount of Put converted into spermidine as well as the loss of Put per gram fresh weight were significantly higher in the transgenic cells than the NT cells. The initial half-life of exogenously supplied [14C]Put was not significantly different in the two cell lines. The activity of diamine oxidase, the major enzyme involved in Put catabolism, was comparable in the two cell lines even though the Put content of the transgenic cells was severalfold higher than the NT cells. It is concluded that in poplar cells: (a) exogenously supplied Orn enters the cells and is rapidly converted into Put, (b) the rate of Put catabolism is proportional to the rate of its biosynthesis, and (c) the increased Put degradation occurs without significant changes in the activity of diamine oxidase. |
| doi_str_mv | 10.1104/pp.010792 |
| format | Article |
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The Regulation of Putrescine Catabolism</title><source>Jstor Complete Legacy</source><source>MEDLINE</source><source>Oxford Journals Online</source><source>EZB-FREE-00999 freely available EZB journals</source><creator>Pratiksha Bhatnagar ; Rakesh Minocha ; Minocha, Subhash C.</creator><creatorcontrib>Pratiksha Bhatnagar ; Rakesh Minocha ; Minocha, Subhash C.</creatorcontrib><description>We investigated the catabolism of putrescine (Put) in a non-transgenic (NT) and a transgenic cell line of poplar (Populus nigra × maximowiczii) expressing a mouse (Mus musculus) ornithine (Orn) decarboxylase (odc) cDNA. The transgenic cells produce 3- to 4-fold higher amounts of Put than the NT cells. The rate of loss of Put from the cells and the initial half-life of cellular Put were determined by feeding the cells with [U-14C]Orn and [1,4-14C]Put as precursors and following the loss of [14C]Put in the cells at various times after transfer to label-free medium. The amount of Put converted into spermidine as well as the loss of Put per gram fresh weight were significantly higher in the transgenic cells than the NT cells. The initial half-life of exogenously supplied [14C]Put was not significantly different in the two cell lines. The activity of diamine oxidase, the major enzyme involved in Put catabolism, was comparable in the two cell lines even though the Put content of the transgenic cells was severalfold higher than the NT cells. It is concluded that in poplar cells: (a) exogenously supplied Orn enters the cells and is rapidly converted into Put, (b) the rate of Put catabolism is proportional to the rate of its biosynthesis, and (c) the increased Put degradation occurs without significant changes in the activity of diamine oxidase.</description><identifier>ISSN: 0032-0889</identifier><identifier>EISSN: 1532-2548</identifier><identifier>DOI: 10.1104/pp.010792</identifier><identifier>PMID: 11950994</identifier><identifier>CODEN: PPHYA5</identifier><language>eng</language><publisher>Rockville, MD: American Society of Plant Biologists</publisher><subject>1-Pyrroline-5-Carboxylate Dehydrogenase ; Agronomy. Soil science and plant productions ; Amine Oxidase (Copper-Containing) - metabolism ; Animals ; Biochemical Processes and Macromolecular Structures ; Biological and medical sciences ; Biosynthesis ; Carbon Radioisotopes ; Catabolism ; Cell Line ; Cell lines ; Cellular metabolism ; Economic plant physiology ; Enzymes ; Fundamental and applied biological sciences. Psychology ; Glutamate Decarboxylase - metabolism ; Metabolism ; Mice ; Nitrogen metabolism ; Nitrogen metabolism and other ones (excepting carbon metabolism) ; Nutrition. Photosynthesis. Respiration. Metabolism ; Ornithine - metabolism ; Ornithine Decarboxylase - genetics ; Ornithine Decarboxylase - metabolism ; Oxidoreductases Acting on CH-NH Group Donors - metabolism ; Plant physiology and development ; Plants ; Plants, Genetically Modified ; Polyamines ; Polyamines - metabolism ; Putrescine - metabolism ; Radioactive decay ; Salicaceae - cytology ; Salicaceae - genetics ; Salicaceae - metabolism ; Spermidine - metabolism ; Stem cells ; Transgenic animals</subject><ispartof>Plant physiology (Bethesda), 2002-04, Vol.128 (4), p.1455-1469</ispartof><rights>Copyright 2002 American Society of Plant Biologists</rights><rights>2002 INIST-CNRS</rights><rights>Copyright American Society of Plant Physiologists Apr 2002</rights><rights>Copyright © 2002, American Society of Plant Physiologists 2002</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c582t-a59377295065fae7c9011c0e80953bf849a77a3716f1d930f9b9f66752c600a13</citedby><cites>FETCH-LOGICAL-c582t-a59377295065fae7c9011c0e80953bf849a77a3716f1d930f9b9f66752c600a13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/4280424$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/4280424$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>230,314,776,780,799,881,27901,27902,57992,58225</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=13633711$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/11950994$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Pratiksha Bhatnagar</creatorcontrib><creatorcontrib>Rakesh Minocha</creatorcontrib><creatorcontrib>Minocha, Subhash C.</creatorcontrib><title>Genetic Manipulation of the Metabolism of Polyamines in Poplar Cells. The Regulation of Putrescine Catabolism</title><title>Plant physiology (Bethesda)</title><addtitle>Plant Physiol</addtitle><description>We investigated the catabolism of putrescine (Put) in a non-transgenic (NT) and a transgenic cell line of poplar (Populus nigra × maximowiczii) expressing a mouse (Mus musculus) ornithine (Orn) decarboxylase (odc) cDNA. The transgenic cells produce 3- to 4-fold higher amounts of Put than the NT cells. The rate of loss of Put from the cells and the initial half-life of cellular Put were determined by feeding the cells with [U-14C]Orn and [1,4-14C]Put as precursors and following the loss of [14C]Put in the cells at various times after transfer to label-free medium. The amount of Put converted into spermidine as well as the loss of Put per gram fresh weight were significantly higher in the transgenic cells than the NT cells. The initial half-life of exogenously supplied [14C]Put was not significantly different in the two cell lines. The activity of diamine oxidase, the major enzyme involved in Put catabolism, was comparable in the two cell lines even though the Put content of the transgenic cells was severalfold higher than the NT cells. It is concluded that in poplar cells: (a) exogenously supplied Orn enters the cells and is rapidly converted into Put, (b) the rate of Put catabolism is proportional to the rate of its biosynthesis, and (c) the increased Put degradation occurs without significant changes in the activity of diamine oxidase.</description><subject>1-Pyrroline-5-Carboxylate Dehydrogenase</subject><subject>Agronomy. Soil science and plant productions</subject><subject>Amine Oxidase (Copper-Containing) - metabolism</subject><subject>Animals</subject><subject>Biochemical Processes and Macromolecular Structures</subject><subject>Biological and medical sciences</subject><subject>Biosynthesis</subject><subject>Carbon Radioisotopes</subject><subject>Catabolism</subject><subject>Cell Line</subject><subject>Cell lines</subject><subject>Cellular metabolism</subject><subject>Economic plant physiology</subject><subject>Enzymes</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Glutamate Decarboxylase - metabolism</subject><subject>Metabolism</subject><subject>Mice</subject><subject>Nitrogen metabolism</subject><subject>Nitrogen metabolism and other ones (excepting carbon metabolism)</subject><subject>Nutrition. Photosynthesis. Respiration. Metabolism</subject><subject>Ornithine - metabolism</subject><subject>Ornithine Decarboxylase - genetics</subject><subject>Ornithine Decarboxylase - metabolism</subject><subject>Oxidoreductases Acting on CH-NH Group Donors - metabolism</subject><subject>Plant physiology and development</subject><subject>Plants</subject><subject>Plants, Genetically Modified</subject><subject>Polyamines</subject><subject>Polyamines - metabolism</subject><subject>Putrescine - metabolism</subject><subject>Radioactive decay</subject><subject>Salicaceae - cytology</subject><subject>Salicaceae - genetics</subject><subject>Salicaceae - metabolism</subject><subject>Spermidine - metabolism</subject><subject>Stem cells</subject><subject>Transgenic animals</subject><issn>0032-0889</issn><issn>1532-2548</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>8G5</sourceid><sourceid>BENPR</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNqFkc9rFDEUx4Modq0evIsMgoKHXd9LJpPk4EEWrUKLReo5ZNNMm2UmmSYZof-9WXZtqxdP-fE-38d73y8hLxFWiNB-mKYVIAhFH5EFckaXlLfyMVkA1DtIqY7Is5y3AIAM26fkCFFxUKpdkPHEBVe8bc5M8NM8mOJjaGLflGvXnLliNnHwedz9nMfh1ow-uNz4UF_TYFKzdsOQV81FpX-4qwf687kkl23Fm7X50-Y5edKbIbsXh_OY_Pzy-WL9dXn6_eTb-tPp0nJJy9JwxYSgdcaO98YJqwDRgpOgONv0slVGCMMEdj1eKga92qi-6wSntgMwyI7Jx33fad6M7tK6UJIZ9JT8aNKtjsbrvyvBX-ur-Esjb6lgVf_uoE_xZna56NFnW1c1wcU5a4FcCSXpf0GUTDLa8Qq--QfcxjmFaoKmKDvGEWSF3u8hm2LOyfV3EyPoXdJ6mvQ-6cq-frjiPXmItgJvD4DJ1gx9MsH6fM-xjlUHd1692nPbXGK6q7dUQktb9hsOurnE</recordid><startdate>20020401</startdate><enddate>20020401</enddate><creator>Pratiksha Bhatnagar</creator><creator>Rakesh Minocha</creator><creator>Minocha, Subhash C.</creator><general>American Society of Plant Biologists</general><general>American Society of Plant Physiologists</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>4T-</scope><scope>7X2</scope><scope>7X7</scope><scope>7XB</scope><scope>88A</scope><scope>88E</scope><scope>88I</scope><scope>8AF</scope><scope>8AO</scope><scope>8FE</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>LK8</scope><scope>M0K</scope><scope>M0S</scope><scope>M1P</scope><scope>M2O</scope><scope>M2P</scope><scope>M7P</scope><scope>MBDVC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>Q9U</scope><scope>S0X</scope><scope>8FD</scope><scope>FR3</scope><scope>P64</scope><scope>RC3</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>20020401</creationdate><title>Genetic Manipulation of the Metabolism of Polyamines in Poplar Cells. 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The Regulation of Putrescine Catabolism</atitle><jtitle>Plant physiology (Bethesda)</jtitle><addtitle>Plant Physiol</addtitle><date>2002-04-01</date><risdate>2002</risdate><volume>128</volume><issue>4</issue><spage>1455</spage><epage>1469</epage><pages>1455-1469</pages><issn>0032-0889</issn><eissn>1532-2548</eissn><coden>PPHYA5</coden><abstract>We investigated the catabolism of putrescine (Put) in a non-transgenic (NT) and a transgenic cell line of poplar (Populus nigra × maximowiczii) expressing a mouse (Mus musculus) ornithine (Orn) decarboxylase (odc) cDNA. The transgenic cells produce 3- to 4-fold higher amounts of Put than the NT cells. The rate of loss of Put from the cells and the initial half-life of cellular Put were determined by feeding the cells with [U-14C]Orn and [1,4-14C]Put as precursors and following the loss of [14C]Put in the cells at various times after transfer to label-free medium. The amount of Put converted into spermidine as well as the loss of Put per gram fresh weight were significantly higher in the transgenic cells than the NT cells. The initial half-life of exogenously supplied [14C]Put was not significantly different in the two cell lines. The activity of diamine oxidase, the major enzyme involved in Put catabolism, was comparable in the two cell lines even though the Put content of the transgenic cells was severalfold higher than the NT cells. It is concluded that in poplar cells: (a) exogenously supplied Orn enters the cells and is rapidly converted into Put, (b) the rate of Put catabolism is proportional to the rate of its biosynthesis, and (c) the increased Put degradation occurs without significant changes in the activity of diamine oxidase.</abstract><cop>Rockville, MD</cop><pub>American Society of Plant Biologists</pub><pmid>11950994</pmid><doi>10.1104/pp.010792</doi><tpages>15</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Plant physiology (Bethesda), 2002-04, Vol.128 (4), p.1455-1469 |
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| subjects | 1-Pyrroline-5-Carboxylate Dehydrogenase Agronomy. Soil science and plant productions Amine Oxidase (Copper-Containing) - metabolism Animals Biochemical Processes and Macromolecular Structures Biological and medical sciences Biosynthesis Carbon Radioisotopes Catabolism Cell Line Cell lines Cellular metabolism Economic plant physiology Enzymes Fundamental and applied biological sciences. Psychology Glutamate Decarboxylase - metabolism Metabolism Mice Nitrogen metabolism Nitrogen metabolism and other ones (excepting carbon metabolism) Nutrition. Photosynthesis. Respiration. Metabolism Ornithine - metabolism Ornithine Decarboxylase - genetics Ornithine Decarboxylase - metabolism Oxidoreductases Acting on CH-NH Group Donors - metabolism Plant physiology and development Plants Plants, Genetically Modified Polyamines Polyamines - metabolism Putrescine - metabolism Radioactive decay Salicaceae - cytology Salicaceae - genetics Salicaceae - metabolism Spermidine - metabolism Stem cells Transgenic animals |
| title | Genetic Manipulation of the Metabolism of Polyamines in Poplar Cells. The Regulation of Putrescine Catabolism |
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