Plasmodium falciparum secretory pathway: characterization of PfStx1, a plasma membrane Qa-SNARE

Mol Biochem Parasitol. 2009 Apr;164(2):153-6. doi: 10.1016/j.molbiopara.2008.11.011. Epub 2008 Dec 6.

Abstract

SNAREs (soluble N-ethylmaleimide-sensitive factor attachment protein receptors) play a central role in regulating and facilitating vesicular traffic in eukaryotic cells. While SNAREs have been well characterized in other eukaryotes, little is known about their role in the unique protein trafficking pathways in Plasmodium falciparum. We have identified seven Qa-SNAREs in the P. falciparum genome and confirmed the gene structure of all seven, which in one case differs from the predicted structure in the database. Based on comprehensive sequence alignments we made predictions for the intracellular locations of all seven P. falciparum Qa-SNAREs, and confirmed the predicted location for one Qa-SNARE, PfStx1, which is most closely related to other eukaryotic plasma membrane Qa-SNAREs such as syntaxin 1. This is the first identified trafficking component localized proximal to the P. falciparum plasma membrane.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Cell Membrane / chemistry
  • DNA, Protozoan / chemistry
  • DNA, Protozoan / genetics
  • Molecular Sequence Data
  • Plasmodium falciparum / genetics
  • Plasmodium falciparum / metabolism
  • Protozoan Proteins / genetics*
  • Protozoan Proteins / metabolism
  • Qa-SNARE Proteins / genetics*
  • Qa-SNARE Proteins / metabolism
  • Secretory Pathway / genetics*
  • Sequence Alignment
  • Sequence Analysis, DNA

Substances

  • DNA, Protozoan
  • Protozoan Proteins
  • Qa-SNARE Proteins

Associated data

  • GENBANK/EF142857