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Phosphate-selective porins are a family of outer bacterial membrane proteins. These are anion-specific porins, the binding site of which has a higher affinity for phosphate than chloride ions. Porin O has a higher affinity for polyphosphates, while porin P has a higher affinity for orthophosphate. In Pseudomonas aeruginosa, porin O was found to be expressed only under phosphate-starvation conditions during the stationary growth phase.

References

1. Hancock RE, Egli C, Benz R, Siehnel RJ (January 1992). "Overexpression in Escherichia coli and functional analysis of a novel PPi-selective porin, oprO, from Pseudomonas aeruginosa". J. Bacteriol. 174 (2): 471–6. doi:10.1128/jb.174.2.471-476.1992. PMC 205739. PMID 1370289.
2. Siehnel RJ, Egli C, Hancock RE (August 1992). "Polyphosphate-selective porin OprO of Pseudomonas aeruginosa: expression, purification and sequence". Mol. Microbiol. 6 (16): 2319–26. doi:10.1111/j.1365-2958.1992.tb01407.x. PMID 1406271. S2CID 23190468.

• Outer membrane proteins
• Protein families