Extra-glycosomal localisation of Trypanosoma brucei hexokinase 2.
Extra-glycosomal localisation of Trypanosoma brucei hexokinase 2.
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DOI:
10.1016/j.ijpara.2012.02.008
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发表时间:
2012-04
影响因子:
4
通讯作者:
Morris JC
中科院分区:
文献类型:
--
作者:
Joice AC;Lyda TL;Sayce AC;Verplaetse E;Morris MT;Michels PA;Robinson DR;Morris JC
The majority of the glycolytic enzymes in the African trypanosome are compartmentalized within peroxisome-like organelles, the glycosomes. Polypeptides harboring peroxisomal targeting sequences (PTS type 1 or 2) are targeted to these organelles. This targeting is essential to parasite viability, as compartmentalization of glycolytic enzymes prevents unregulated ATP-dependent phosphorylation of intermediatemetabolites. Here, we report the surprising extra-glycosomal localization of aPTS-2 bearing trypanosomal hexokinase, TbHK2. In bloodstream form parasites, the protein localizes to both glycosomes and to the flagellum. Evidence for this includes fractionation and immunofluorescence studies using antisera generated against the authentic protein as well as detection of epitope-tagged recombinant versions of the protein. In the insect stage parasite, distribution is different, with the polypeptide localized to glycosomes and proximal to the basal bodies. The function of the extra-glycosomal protein remains unclear. While its association with the basal body suggests that it may have a role in locomotion in the insect stage parasite, no detectable defect indirectional motility or velocity of cell movement were observed for TbHK2-deficient cells, suggesting that protein may have a different function in the cell.
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影响因子:
3.7
作者:
Kroth PG;Chiovitti A;Gruber A;Martin-Jezequel V;Mock T;Parker MS;Stanley MS;Kaplan A;Caron L;Weber T;Maheswari U;Armbrust EV;Bowler C
通讯作者:
Bowler C
DOI:
10.1083/jcb.200201036
发表时间:
2002-03-04
期刊:
The Journal of cell biology
影响因子:
--
作者:
Hutchings NR;Donelson JE;Hill KL
通讯作者:
Hill KL
影响因子:
1.5
作者:
Burkard, Gabriela;Fragoso, Cristina M.;Roditi, Isabel
通讯作者:
Roditi, Isabel
影响因子:
3.3
作者:
Mitchell, BF;Pedersen, LB;Mitchell, DR
通讯作者:
Mitchell, DR
影响因子:
1.5
作者:
Biebinger, S;Wirtz, LE;Clayton, C
通讯作者:
Clayton, C