Molecular features of the L-type amino acid transporter 2 determine different import and export profiles for thyroid hormones and amino acids
Molecular features of the L-type amino acid transporter 2 determine different import and export profiles for thyroid hormones and amino acids
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L 型氨基酸转运蛋白 2 的分子特征决定了甲状腺激素和氨基酸的不同进出口情况
DOI:
10.1016/j.mce.2017.01.024
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发表时间:
2017
影响因子:
4.1
通讯作者:
Krause G
中科院分区:
文献类型:
--
作者:
Hinz KM;Neef D;Rutz C;Furkert J;Koehrle J;Schuelein R;Krause G
The L-type amino acid transporter 2 (LAT2) imports amino acids (AA) and also certain thyroid hormones (TH), e.g. 3,3′-T2and T3, but not rT3and T4. We utilized LAT2 mutations (Y130A, N133S, F242W) that increase 3,3′-T2import and focus here on import and export capacity for AA, T4, T3, BCH and derivatives thereof to delineate molecular features.Transport studies and analysis of competitive inhibition of import by radiolabelled TH and AA were performed in Xenopus laevis oocytes. Only Y130A, a pocket widening mutation, enabled import for T4and increased it for T3. Mutant F242W showed increased 3,3′-T2import but no import rates for other TH derivatives. No export was detected for any TH by LAT2-wild type (WT). Mutations Y130A and N133S enabled only the export of 3,3′-T2, while N133S also increased AA export. Thus, distinct molecular LAT2-features determine bidirectional AA transport but only an unidirectional 3,3′-T2and T3import.
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影响因子:
4.8
作者:
Rossier, G;Meier, C;Kühn, LC
通讯作者:
Kühn, LC
DOI:
10.1073/pnas.1323779111
发表时间:
2014-02-25
影响因子:
11.1
作者:
Rosell, Albert;Meury, Marcel;Fotiadis, Dimitrios
通讯作者:
Fotiadis, Dimitrios
影响因子:
168.9
作者:
Friesema, ECH;Grueters, A;Visser, T
通讯作者:
Visser, T
DOI:
10.1016/s0021-9258(18)91789-8
发表时间:
1969
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
H. Christensen;M. Handlogten;I. Lam;H. Tager;R. Zand
通讯作者:
R. Zand
影响因子:
4.5
作者:
Verrey, F
通讯作者:
Verrey, F