Title : Properties of the spermidine/spermine N1-acetyltransferase mutant L156F that decreases cellular sensitivity to the polyamine analogue N1, N11-bis(ethyl)norspermine.

Pub. Date : 2003 Apr 18

PMID : 12578836






10 Functional Relationships(s)
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1 Properties of a mutant form of spermidine/spermine N(1)-acetyltransferase, L156F (L156F-SSAT), that is present in Chinese hamster ovary cells selected for resistance to the polyamine analogue N(1,) N(11)-bis(ethyl)norspermine (BE 3-3-3) were investigated. Polyamines diamine acetyltransferase 1 Cricetulus griseus
2 Properties of a mutant form of spermidine/spermine N(1)-acetyltransferase, L156F (L156F-SSAT), that is present in Chinese hamster ovary cells selected for resistance to the polyamine analogue N(1,) N(11)-bis(ethyl)norspermine (BE 3-3-3) were investigated. N(1),N(11)-diethylnorspermine diamine acetyltransferase 1 Cricetulus griseus
3 Increased K(m) values, decreased V(max) values, and decreased k(cat) values with both polyamine substrates, spermidine and spermine, indicated that L156F-SSAT is an inferior and less efficient acetyltransferase than wild-type SSAT. Polyamines diamine acetyltransferase 1 Cricetulus griseus
4 Increased K(m) values, decreased V(max) values, and decreased k(cat) values with both polyamine substrates, spermidine and spermine, indicated that L156F-SSAT is an inferior and less efficient acetyltransferase than wild-type SSAT. Polyamines diamine acetyltransferase 1 Cricetulus griseus
5 Increased K(m) values, decreased V(max) values, and decreased k(cat) values with both polyamine substrates, spermidine and spermine, indicated that L156F-SSAT is an inferior and less efficient acetyltransferase than wild-type SSAT. Spermidine diamine acetyltransferase 1 Cricetulus griseus
6 Increased K(m) values, decreased V(max) values, and decreased k(cat) values with both polyamine substrates, spermidine and spermine, indicated that L156F-SSAT is an inferior and less efficient acetyltransferase than wild-type SSAT. Spermidine diamine acetyltransferase 1 Cricetulus griseus
7 Increased K(m) values, decreased V(max) values, and decreased k(cat) values with both polyamine substrates, spermidine and spermine, indicated that L156F-SSAT is an inferior and less efficient acetyltransferase than wild-type SSAT. Spermine diamine acetyltransferase 1 Cricetulus griseus
8 Increased K(m) values, decreased V(max) values, and decreased k(cat) values with both polyamine substrates, spermidine and spermine, indicated that L156F-SSAT is an inferior and less efficient acetyltransferase than wild-type SSAT. Spermine diamine acetyltransferase 1 Cricetulus griseus
9 Only a 4-fold induction of L156F-SSAT activity resulted from the exposure of cells to the polyamine analogue, whereas wild-type SSAT was induced approximately 300-fold. Polyamines diamine acetyltransferase 1 Cricetulus griseus
10 Only a 4-fold induction of L156F-SSAT activity resulted from the exposure of cells to the polyamine analogue, whereas wild-type SSAT was induced approximately 300-fold. Polyamines diamine acetyltransferase 1 Cricetulus griseus