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Gene Review

lpp20  -  lipoprotein

Helicobacter pylori J99

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Disease relevance of lpp20

  • Growth of E. coli cells expressing the cloned H. pylori lpp20 gene in the presence of [3H]palmitic acid resulted in radiolabelled Lpp20 while treatment of the E. coli cells with globomycin caused accumulation of unprocessed Lpp20, consistent with Lpp20 being a lipoprotein [1].
  • We also investigated the prevalence of antibodies against H. pylori-associated lipoprotein 20 (lpp20) in patients with and without chronic urticaria [2].

High impact information on lpp20

  • Seven promoters for genes encoding alpha-carbonic anhydrase, omp11, fecD, lpp20, hypA, and two with unknown function (pHP1397-1396 and pHP0654-0675) were clustered in gene group A, which may respond to changes in the periplasmic pH at a constant cytoplasmic pH and showed phosphorylation-dependent binding in EMSA with HP0166-D52N-His(6) [3].
  • The lpp20 gene encoding this protein was cloned in Escherichia coli by using the vector lambda EMBL3, and plasmid subclones expressed the full-length protein from the native H. pylori promoter. lpp20 was mapped to the same 358-kb NruI fragment as flaB [1].
  • The level of anti-lpp20 antibodies was determined by Western blot using various H. pylori antigens (from 19 to 120 kDa) [2].

Analytical, diagnostic and therapeutic context of lpp20

  • The prevalence of the anti-lpp20 antibodies was significantly higher in subgroup 1 compared to the control group (93.9 vs 21.2%, P < 0.0001 for IgG, and 46.1 vs 6.3%, P < 0.0029 for IgA) [2].


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