Model Analysis of the Apparent Saturation Kinetics of Purine Nucleobase Uptake in Cells co-Expressing Transporter and Metabolic Enzyme
Model Analysis of the Apparent Saturation Kinetics of Purine Nucleobase Uptake in Cells co-Expressing Transporter and Metabolic Enzyme
复制标题
共表达转运蛋白和代谢酶的细胞嘌呤核碱基摄取表观饱和动力学的模型分析
DOI:
10.1007/s11095-021-03086-w
复制
发表时间:
2021
影响因子:
3.7
通讯作者:
Shirasaka Yoshiyuki
中科院分区:
文献类型:
--
作者:
Suzuki Satoru;Inoue Katsuhisa;Tamai Ikumi;Shirasaka Yoshiyuki
PurposeThis study aims to understand the effect of salvage enzyme activity on the saturable kinetics of facilitated cellular uptake of purine nucleobase by developing a cellular kinetic model incorporating equilibrative nucleobase transporter 1 (ENBT1) and adenine phosphoribosyltransferase (APRT), with adenine as a model nucleobase.MethodsA cellular kinetic model incorporating the functions of ENBT1 and APRT was developed using Napp software and employed for model-based analysis of the cellular disposition of adenine.ResultsSimulation analysis using the developed cellular kinetic model could account for the experimentally observed time-dependent changes in theKm(app)value of adenine for ENBT1-mediated uptake. At a long experimental time, the model shows that uptake of adenine is rate-limited by APRT, enabling determination of theKmvalue for APRT. At early time, the rate-limiting step for adenine uptake is ENBT1-mediated transport, enabling determination of theKmvalue for ENBT1. Further simulations showed that the effect of experimental time on theKm(app)value for ENBT1-mediated uptake is dependent on the APRT expression level.ConclusionOur findings indicate that both enzyme expression levels and experimental time should be considered when using cellular uptake studies to determine theKmvalues of purine nucleobases for facilitated transporters.
登录
查看更多内容
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--
影响因子:
1.3
作者:
Damaraju, Vijaya L.;Mowles, Delores;Tong, Zeen
通讯作者:
Tong, Zeen
影响因子:
2.1
作者:
Koichi Takahashi;K. Yoshisue;M. Chiba;T. Nakanishi;I. Tamai
通讯作者:
I. Tamai
影响因子:
4.8
作者:
R. Marz;R. Wohlhueter;P. Plagemann
通讯作者:
P. Plagemann
DOI:
10.1074/jbc.m109.032961
发表时间:
2009
期刊:
The Journal of Biological Chemistry
影响因子:
--
作者:
Syunsuke Yamamoto;Katsuhisa Inoue;Tomoaki Murata;Syunsuke Kamigaso;Tomoya Yasujima;Jun;Y. Yoshida;Kin;H. Yuasa
通讯作者:
H. Yuasa