Proteomic profiling of the influence of iron availability on Cryptococcus gattii

J Proteome Res. 2012 Jan 1;11(1):189-205. doi: 10.1021/pr2005296. Epub 2011 Oct 26.

Abstract

Iron is essential and ubiquitous in living organisms. The competition for this micronutrient between the host and its pathogens has been related to disease establishment. Cryptococcus gattii is an encapsulated yeast that causes cryptococcosis mainly in immunocompetent individuals. In this study, we analyzed the proteomic profile of the C. gattii R265 Vancouver Island isolate under iron-depleted and -repleted conditions by multidimensional protein identification technology (MudPIT) and by 2D-GE. Proteins and key mechanisms affected by alteration of iron levels such as capsule production, cAMP-signaling pathway, response to stress, and metabolic pathways related to mitochondrial function were identified. Our results also show both proteomic methodologies employed to be complementary.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biosynthetic Pathways
  • Cryptococcus gattii / genetics
  • Cryptococcus gattii / growth & development
  • Cryptococcus gattii / metabolism*
  • Electrophoresis, Gel, Two-Dimensional
  • Fungal Proteins / classification
  • Fungal Proteins / genetics
  • Fungal Proteins / metabolism*
  • Gene Expression
  • Gene Expression Regulation, Fungal
  • Iron / metabolism
  • Iron / physiology*
  • Molecular Sequence Annotation
  • Proteome / classification
  • Proteome / genetics
  • Proteome / metabolism*
  • Proteomics

Substances

  • Fungal Proteins
  • Proteome
  • Iron