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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Jakob, Mario Hauer, René Steffen Heilmann, Kathleen Dittmar, Julia Klösgen, Ralf Bernd Schlesier, René |
| Description | Author Affiliation: Hauer RS ( Institute of Biology - Plant Physiology, Martin Luther University Halle-Wittenberg, Weinbergweg 10, Germany.) |
| Abstract | The twin-arginine translocation (Tat $^{1}$ ) pathway is unique with respect to its property to translocate proteins in a fully folded conformation across ion-tight membranes. In chloroplasts and Gram-negative bacteria, Tat translocase consists of the integral subunits TatB and TatC, which are assumed to constitute the membrane receptor, and TatA, a bitopic membrane protein being responsible in a yet unknown manner for the membrane translocation step. Antibody inhibition of intrinsic thylakoidal TatA activity and recovery of transport by heterologously expressed, purified TatA allowed to exactly quantify the amount of TatA required to catalyse membrane transport of the model Tat substrate 16/23. We can show that TatA concentrations in the 100 nM range are sufficient to efficiently catalyse membrane transport of the protein, which corresponds well to the amount of TatA identified in thylakoids. Furthermore, TatA shows cooperativity in its catalytic activity suggesting that Tat translocase operates as an allosteric enzyme complex. |
| ISSN | 00063002 |
| Journal | Biochimica et Biophysica Acta (BBA) - Reviews on Cancer |
| Issue Number | 5 |
| Volume Number | 1833 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2013-05-01 |
| Publisher Place | Netherlands |
| Access Restriction | Open |
| Subject Keyword | Arabidopsis Proteins Arabidopsis Arginine Membrane Transport Proteins Protein Transport Chemistry Genetics Metabolism Cell Membrane Cytoplasm Gene Expression Regulation, Plant Metabolic Networks And Pathways Thylakoids Research Support, Non-U.S. Gov't Biochemistry |
| Content Type | Text |
| Resource Type | Article |
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