Bacterial machineries for the assembly of membrane-embedded β-barrel proteins | Zendy

David Ranava | Zendy; Anne CaumontSarcos | Zendy; Cécile Albenne | Zendy; Raffaele Ieva | Zendy

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Bacterial machineries for the assembly of membrane-embedded β-barrel proteins

Author(s) -

David Ranava,

Anne CaumontSarcos,

Cécile Albenne,

Raffaele Ieva

Publication year - 2018

Publication title -

fems microbiology letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.899

H-Index - 151

eISSN - 1574-6968

pISSN - 0378-1097

DOI - 10.1093/femsle/fny087

Subject(s) - bacterial outer membrane , biogenesis , barrel (horology) , secretion , biology , microbiology and biotechnology , organelle , bacteria , virulence factor , virulence , computational biology , biochemistry , gene , escherichia coli , genetics , materials science , composite material

The outer membrane (OM) of Gram-negative bacteria is an essential organelle that protects cells from external aggressions and mediates the secretion of virulence factors. Efficient assembly of integral OM β-barrel proteins (OMPs) is crucial for the correct functioning of the OM. Biogenesis of OMPs occurs in a stepwise manner that is finalized by the β-barrel assembly machinery (BAM complex). Some OMPs further require the translocation and assembly module (TAM) for efficient and correct integration into the OM. Both the BAM complex and the TAM contain a protein of the Omp85 superfamily and distinct interacting factors. Their mechanism of action, however, remains largely elusive. We summarize and discuss recent structural and biochemical analyses that are helping to elucidate the molecular pathways of OMP assembly.

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