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The two domains of centrin have distinct basal body functions in Tetrahymena.

Tyson Vonderfecht | Alexander J Stemm-Wolf | Melissa Hendershott | Thomas H Giddings | Janet B Meehl | Mark Winey
Molecular biology of the cell | 2011

The basal body is a microtubule-organizing center responsible for organizing the cilium, a structure important for cell locomotion and sensing of the surrounding environment. A widely conserved basal body component is the Ca(2+)-binding protein centrin. Analyses of centrin function suggest a role in basal body assembly and stability; however, its molecular mechanisms remain unclear. Here we describe a mutagenic strategy to study the function and essential nature of the various structural features of Cen1 in the ciliate Tetrahymena. We find that the two domains of Cen1 are both essential, and examination of strains containing mutant CEN1 alleles indicates that there are two predominant basal body phenotypes: misorientation of newly assembled basal bodies and stability defects. The results also show that the two domains of Cen1 are able to bind Ca(2+) and that perturbation of Ca(2+) binding affects Cen1 function. In all, the data suggest that the two domains of Cen1 have distinct functions.

Pubmed ID: 21562224

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Associated grants

  • Agency: NIGMS NIH HHS, United States
    Id: GM074746
  • Agency: NIGMS NIH HHS, United States
    Id: T32 GM008759
  • Agency: NIGMS NIH HHS, United States
    Id: T32 GM142607
  • Agency: NIGMS NIH HHS, United States
    Id: R01 GM074746
  • Agency: NIGMS NIH HHS, United States
    Id: T32 GM08759

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MetaMorph Microscopy Automation and Image Analysis Software (tool)

RRID:SCR_002368

Software tool for automated microscope acquisition, device control, and image analysis. Used for integrating dissimilar fluorescent microscope hardware and peripherals into a single custom workstation, while providing all the tools needed to perform analysis of acquired images. Offers user friendly application modules for analysis such as cell signaling, cell counting, and protein expression.

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