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- W2144848814 abstract "Abstract Identification of differentially proteomic responses to external pHs would pave an access for understanding of survival mechanisms of bacteria living at extreme pH environment. We cultured Alkalimonas amylolytica N10 (N10), a novel alkaliphilic bacterium found in Lake Chahannor, in media with three different pHs and extracted the correspondent membrane and cytoplasm proteins for proteomic analysis through 2‐DE. The differential 2‐DE spots corresponding to the altered pHs were delivered to MALDI TOF/TOF MS for protein identification. Since the genomic data of strain N10 was unavailable, we encountered a problem at low rate of protein identification with 18.1%. We employed, therefore, a combined strategy of de novo sequencing to analyze MS/MS signals generated from MALDI TOF/TOF MS. A significantly improved rate of protein identification was thus achieved at over than 70.0%. Furthermore, we extensively investigated the expression of these pH‐dependent N10 genes using Western blot and real‐time PCR. The conclusions drawn from immunoblot and mRNA measurements were mostly in agreement with the proteomic observations. We conducted the bioinformatic analysis to all the pH‐dependent N10 proteins and found that some membrane proteins participated in iron transport were differentially expressed as external pH elevated and most of differential proteins with increased or bell‐shape mode of pH‐dependence were involved in bioenergetic process and metabolism of carbohydrates, fatty acid, amino acids, and nucleotides. Our data thus provide a functional profile of the pH‐responsive proteins in alkaliphiles, leading to elucidation of alkaliphilic‐adaptive mechanism." @default.
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- W2144848814 date "2009-02-27" @default.
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- W2144848814 title "Exploring membrane and cytoplasm proteomic responses of <b><i>Alkalimonas amylolytica</i></b> N10 to different external pHs with combination strategy of <b><i>de novo</i></b> peptide sequencing" @default.
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- W2144848814 doi "https://doi.org/10.1002/pmic.200800244" @default.
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