A widened substrate selectivity filter of eukaryotic formate‐nitrite transporters enables high‐level lactate conductance
A widened substrate selectivity filter of eukaryotic formate‐nitrite transporters enables high‐level lactate conductance
复制标题
真核甲酸亚硝酸盐转运蛋白的加宽底物选择性过滤器可实现高水平的乳酸电导
DOI:
10.1111/febs.14117
复制
发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Golldack
中科院分区:
文献类型:
--
作者:
Wiechert;Golldack
Bacterial formate‐nitrite transporters (FNT) regulate the metabolic flow of small weak mono‐acids derived from anaerobic mixed‐acid fermentation, such as formate, and further transport nitrite and hydrosulfide. The eukaryoticPlasmodium falciparumFNT is vital for the malaria parasite by its ability to release the largerl‐lactate substrate as the metabolic end product of anaerobic glycolysis in symport with protons preventing cytosolic acidification. However, the molecular basis for substrate discrimination by FNTs has remained unclear. Here, we identified a size‐selective FNT substrate filter region around an invariant lysine at the bottom of the periplasmic/extracellular vestibule. The selectivity filter is reminiscent of the aromatic/arginine constriction of aquaporin water and solute channels regarding composition, location in the protein, and the size‐selection principle. Bioinformatics support an adaptation of the eukaryotic FNT selectivity filter to accommodate larger physiologically relevant substrates. Mutations that affect the diameter at the filter site predictably modulated substrate selectivity. The shape of the vestibule immediately above the filter region further affects selectivity. This study indicates that eukaryotic FNTs evolved to transport larger mono‐acid substrates, especiallyl‐lactic acid as a product of energy metabolism.
登录
查看更多内容
影响因子:
11.4
作者:
Binghua Wu;Christina Steinbronn;Magnus Alsterfjord;T. Zeuthen;E. Beitz
通讯作者:
E. Beitz
影响因子:
5.6
作者:
Li, Hui;Chen, Hanning;Voth, Gregory A.
通讯作者:
Voth, Gregory A.
DOI:
10.1073/pnas.1210793109
发表时间:
2012-11-06
影响因子:
11.1
作者:
Lu, Wei;Schwarzer, Nikola J.;Einsle, Oliver
通讯作者:
Einsle, Oliver
影响因子:
3.5
作者:
Slavica Pavlovic;J. Schultz;E. Beitz
通讯作者:
E. Beitz
影响因子:
56.9
作者:
Lue, Wei;Du, Juan;Einsle, Oliver
通讯作者:
Einsle, Oliver