alexa Passage of heme-iron across the envelope of Staphylococcus aureus.
Medicine

Medicine

Internal Medicine: Open Access

Author(s): Mazmanian SK, Skaar EP, Gaspar AH, Humayun M, Gornicki P,

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Abstract The cell wall envelope of Gram-positive pathogens functions as a scaffold for the attachment of virulence factors and as a sieve that prevents diffusion of molecules. Here the isd genes (iron-regulated surface determinant) of Staphylococcus aureus were found to encode factors responsible for hemoglobin binding and passage of heme-iron to the cytoplasm, where it acts as an essential nutrient. Heme-iron passage required two sortases that tether Isd proteins to unique locations within the cell wall. Thus, Isd appears to act as an import apparatus that uses cell wall-anchored proteins to relay heme-iron across the bacterial envelope. This article was published in Science and referenced in Internal Medicine: Open Access

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