Interplay between Porphyromonas gingivalis hemophore-like protein HmuY and Kgp/RgpA gingipains plays a superior role in heme supply - yet unpublished supplementary data regarding Fig. 4C and Fig. 6D.

<p>The upload contains raw data files for the article "Interplay between <em>Porphyromonas gingivalis</em> hemophore-like protein HmuY and Kgp/RgpA gingipains plays a superior role in heme supply" which shows the production of the HmuY protein in various <em>P. gingivalis</em> mutant strains. These data are not present in the supplementary data of publication.</p> <p><strong>Article abstract</strong></p> <p>To acquire heme as a source of iron and protoporphyrin IX,&nbsp;<em>Porphyromonas gingivalis</em>&nbsp;uses gingipains, Hmu, and Hus systems. The aim of this study was to assess the correlation between the production and function of the most important virulence factors of&nbsp;<em>P. gingivalis</em>&nbsp;involved in heme supply, namely, hemophore-like proteins (HmuY and HusA) and gingipains. Respective mutant strains were used, and the expression of genes at the transcript and protein levels, as well as the importance of these genes&rsquo; products for virulence potential, was examined. We found that HmuY and Kgp/RgpA gingipains are among the main&nbsp;<em>P. gingivalis</em>&nbsp;virulence factors synergistically engaged in heme supply. Their expression is related mainly when&nbsp;<em>P. gingivalis</em>&nbsp;grows in conditions rich in iron and heme sources, resembling those found in severe periodontitis. We confirmed that HmuY production is strictly dependent on the availability of heme and iron in the external environment, whereas we did not observe such dependence in the production of HusA. Moreover, we found that the HmuY protein can easily sequester heme from the HusA protein. The only correlation in the production of HmuY and HusA hemophore-like proteins could occur in&nbsp;<em>P. gingivalis</em>&nbsp;grown in conditions rich in iron and heme sources, mimicking an environment typical for severe periodontitis. Based on our observations, we suggest that HmuY is the major heme-binding protein produced by&nbsp;<em>P. gingivalis</em>, especially in iron- and heme-depleted conditions, typical for healthy periodontium and the initial stages of infection. The HusA protein could play a supporting role in&nbsp;<em>P. gingivalis</em> heme uptake.&nbsp;</p> <p>The Word document (Data description.docx) contains a description of files.</p>