Escape from bacterial iron piracy through rapid evolution of transferrin.

Escape from bacterial iron piracy through rapid evolution of transferrin.
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DOI:
10.1126/science.1259329
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发表时间:
2014-12-12
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Elde NC
Elde NC
中科院分区:
其他
文献类型:
--
作者:
Barber MF;Elde NC

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Iron sequestration provides an innate defense termed nutritional immunity, leading pathogens to scavenge iron from hosts. Although the molecular basis of this battle for iron is established, its potential as a force for evolution at host-pathogen interfaces is unknown. We show that the iron transport protein transferrin is engaged in ancient and ongoing evolutionary conflicts with TbpA, a transferrin surface receptor from bacteria. Single substitutions in transferrin at rapidly evolving sites reverse TbpA binding, providing a mechanism to counteract bacterial iron piracy among great apes. Furthermore, the C2 transferrin polymorphism in humans evades TbpA variants from Haemophilus influenzae, revealing a functional basis for standing genetic variation. These findings identify a central role for nutritional immunity in the persistent evolutionary conflicts between primates and bacterial pathogens.
DOI: 10.1111/j.1365-2958.1988.tb00029.x
发表时间: 1988-03-01
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