TY  - JOUR
A1  - Kahl, Günter
T1  - Activation of protein synthesis in aging potato tuber slices
T2  - Zeitschrift für Naturforschung, B
N2  - Whereas ribosome preparations of freshly sliced potato disks do not show appreciable activity in an in-vitro amino acid incorporation system, aging of the tissue leads to a greatly enhanced incorporation activity which reaches its maximum 24 hours after slicing. If ribosomes from freshly excised disks are provided with polyuridylic acid, their activity in the incorporation of phenylalanine is increased about 8 fold.
Moreover, an RNA-fraction can be dissociated by EDTA from ribosomes of aged potato tuber slices, which sediments at 15 —18S, has a base composition different from that of 16S — rRNA, 5S-and 4S —RNA, and is not present on ribosomes of fresh slices. Its appearance is inhibited by actinomycin D and therefore most probably dependent on transcription. This compound, purified from sucrose gradients, enhances in vitro leucine incorporation into peptide material by ribosomes of fresh potato slices.
The possibility is discussed that this fraction-among other factors-is responsible for the enhanced protein synthesis after slicing plant storage organs, and is indicative of a general derepression phenomenon in these tissues.
Y1  - 2014
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/71499
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-714993
SN  - 1865-7117
SN  - 0932-0776
VL  - 26
IS  - 10
SP  - 1064
EP  - 1067
PB  - Verlag der Zeitschrift für Naturforschung
CY  - Tübingen
ER  -