what is the siderophore?
Siderophores are specialized molecules secreted to bind ferric ion (Fe3+) and transport it into the cell.
The iron is released into the cytoplasm and reduced to the more useful ferrous (Fe2+) form.
Siderophores are amongst the strongest soluble Fe3+ binding agents known. These are elaborated by bacteria and fungi growing under low iron stress. These are common products of aerobic and facultative anaerobic bacteria and of fungi.
Note: Neisseria gonorrhoeae employs receptors on its surface that bind human iron complexes and wrest the iron from them.
Lecturer, Pokhara University, Nepal