A functional role of Rv1738 in Mycobacterium tuberculosis persistence suggested by racemic protein crystallography Academic Article uri icon

Overview

MeSH Major

  • Bacterial Proteins
  • Mycobacterium tuberculosis

abstract

  • Protein 3D structure can be a powerful predictor of function, but it often faces a critical roadblock at the crystallization step. Rv1738, a protein from Mycobacterium tuberculosis that is strongly implicated in the onset of nonreplicating persistence, and thereby latent tuberculosis, resisted extensive attempts at crystallization. Chemical synthesis of the L- and D-enantiomeric forms of Rv1738 enabled facile crystallization of the D/L-racemic mixture. The structure was solved by an ab initio approach that took advantage of the quantized phases characteristic of diffraction by centrosymmetric crystals. The structure, containing L- and D-dimers in a centrosymmetric space group, revealed unexpected homology with bacterial hibernation-promoting factors that bind to ribosomes and suppress translation. This suggests that the functional role of Rv1738 is to contribute to the shutdown of ribosomal protein synthesis during the onset of nonreplicating persistence of M. tuberculosis.

publication date

  • April 7, 2015

Research

keywords

  • Academic Article

Identity

Language

  • eng

PubMed Central ID

  • PMC4394262

Digital Object Identifier (DOI)

  • 10.1073/pnas.1422387112

PubMed ID

  • 25831534

Additional Document Info

start page

  • 4310

end page

  • 5

volume

  • 112

number

  • 14