Abstract
Cellular extracts from cells with reduced synthesis of negatively charged phospholipids were found to support in vitro translocation of the precursor of the outer membrane protein PhoE with increased efficiency. Analysis of these extracts revealed that they contain increased levels of SecA. SecA depletion resulted in a loss of the translocation stimulatory activity, which could be restored by re-addition of purified SecA. We conclude that elevated cytosolic levels of SecA counteract the reduction of translocation efficiency due to low levels of negatively charged phospholipids in the inner membrane.
Original language | English |
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Pages (from-to) | 97-100 |
Number of pages | 4 |
Journal | FEBS letters |
Volume | 308 |
Issue number | 1 |
DOIs | |
Publication status | Published - 10 Aug 1992 |
Externally published | Yes |
Keywords
- Bacterial membrane
- PhoE
- Protein translocation: SecA