Outer membrane proteome of Prevotella intermedia 17: identification of thioredoxin and iron-repressible hemin uptake loci.
Outer membrane proteome of Prevotella intermedia 17: identification of thioredoxin and iron-repressible hemin uptake loci.
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中间普雷沃氏菌 17 的外膜蛋白质组:硫氧还蛋白和铁抑制血红素摄取位点的鉴定。
DOI:
10.1002/pmic.200600441
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发表时间:
2007
期刊:
影响因子:
3.4
通讯作者:
Lewis,JaninaP
中科院分区:
文献类型:
--
作者:
Yu,Fan;Anaya,Cecilia;Lewis,JaninaP
Although hemin is an indispensable nutrient for the oral pathogenPrevotella intermedia, not much is known regarding the molecular mechanisms of hemin acquisition. The availability of the genomic sequence of the bacterium allowed us to apply proteomic approaches to identify proteins that may be mediating the hemin acquisition process. As hemin acquisition mechanisms have been shown to be induced in iron‐depleted conditions, we applied proteomic approaches to detect those proteins whose expressions were affected by iron. We analyzed 40 protein spots and identified 19 such proteins. Interestingly, two proteins drastically upregulated in iron‐depleted conditions, PIN0009 and PINA0611, are homologs of hemin uptake receptors in other bacteria. PIN0009 is predicted to be an outer membrane lipoprotein. It is encoded by a gene that is the first of a seven‐gene genomic locus encoding proteins of a novel hemin acquisition system. The second protein, PINA0611, is a homolog of numerous TonB‐dependent outer membrane receptors including outer membrane iron uptake receptors of various Gram‐negative bacteria. There was also another protein, regulated by iron, that was previously demonstrated to bind hemoglobin inP. intermedia. Finally, we identified a thioredoxin‐like protein that has a novel outer membrane location.
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10.1016/s0021-9258(18)47852-0
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1987
期刊:
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影响因子:
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1969
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1972
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1977
期刊:
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影响因子:
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