Recombinant Chlamydia trachomatis omcA protein (His tag)

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

OmcA also known as outer membrane cytochrome A functions as an extracellular electron transfer protein important for the reduction of extracellular metal oxides. This protein with a molecular mass of around 85 kDa is expressed in certain bacterial species such as Shewanella oneidensis. It plays an important role in the microbial electron transport chain facilitating the direct reduction of minerals outside the microbial cell. OmcA is part of a larger family of multi-heme c-type cytochromes which allows for efficient electron transfer.

Biological function summary

OmcA plays a role in the process of microbial respiration particularly in environments where oxygen is limited or absent. OmcA operates as part of a complex mechanism involving other cytochromes including MtrC and MtrA to transfer electrons across the bacterial outer membrane. It interacts with insoluble electron acceptors such as iron and manganese oxides contributing to the microbial reduction of these minerals. This action allows certain bacteria to survive in diverse ecological niches by using alternative terminal electron acceptors.

Pathways

OmcA functions within important electron transport pathways in anaerobic respiration. Its interaction with the Mtr pathway facilitates electrons' transfer from the cell interior to external solid-phase electron acceptors. This pathway is essential for energy conservation in S. oneidensis and involves other proteins such as MtrB which supports the structural integrity needed for electron transfer. The electron transfer capability of OmcA allows bacteria to engage in biogeochemical cycling of metals and plays a part in environmental processes like bioremediation.

OmcA does not directly relate to human diseases but has implications in environmental health. It plays a role in the bioremediation of heavy metals and radioactive materials providing potential benefits for cleaning contaminated environments. OmcA through its interaction with MtrC and MtrA allows bacteria to reduce toxic metal ions converting them to less soluble and hazardous forms. Understanding OmcA and its associated pathways can aid in developing strategies for microbial remediation technologies.