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Purine metabolism in mesophyll protoplasts of tobacco (Nicotiana tabacum) leaves.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Barankiewicz, Jerzy Paszkowski, Jerzy |
| Copyright Year | 1980 |
| Abstract | The overall metabolism of purines was studied in tobacco (Nicotiana tabacum) mesophyll protoplasts. Metabolic pathways were studied by measuring the conversion of radioactive adenine, adenosine, hypoxanthine and guanine into purine ribonucleotides, ribonucleosides, bases and nucleic acid constituents. Adenine was extensively deaminated to hypoxanthine, whereupon it was also converted into AMP and incorporated into nucleic acids. Adenosine was mainly hydrolysed to adenine. Inosinate formed from hypoxanthine was converted into AMP and GMP, which were then catabolized to adenine and guanosine respectively. Guanine was mainly deaminated to xanthine and also incorporated into nucleic acids via GTP. Increased RNA synthesis in the protoplasts resulted in enhanced incorporation of adenine and guanine, but not of hypoxanthine and adenosine, into the nucleic acid fraction. The overall pattern of purine-nucleotide metabolic pathways in protoplasts of tobacco leaf mesophyll is proposed. |
| File Format | PDF HTM / HTML |
| DOI | 10.1042/bj1860343 |
| PubMed reference number | 6154458 |
| Journal | Medline |
| Volume Number | 186 |
| Issue Number | 1 |
| Alternate Webpage(s) | http://www.biochemj.org/content/ppbiochemj/186/1/343.full.pdf |
| Alternate Webpage(s) | https://doi.org/10.1042/bj1860343 |
| Journal | The Biochemical journal |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
