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. 1990 May;87(9):3599–3603. doi: 10.1073/pnas.87.9.3599

Autoantibodies from a patient with scleroderma CREST recognized kinetochores of the higher plant Haemanthus.

J Mole-Bajer 1, A S Bajer 1, R P Zinkowski 1, R D Balczon 1, B R Brinkley 1
PMCID: PMC53949  PMID: 2185478

Abstract

Human autoantibodies from a patient with scleroderma CREST (calcinosis, Raynaud phenomenon, esophageal dismotility, sclerodactyly, telangiectasia) were used to immunostain kinetochores on chromosomes in endosperm of the seed of the monocot Haemanthus katherinae Bak. Kinetochores of mitotic chromosomes and prekinetochores of interphase cells were specifically stained using conventional indirect immunofluorescence procedures as well as a nonfading immunogold-silver-enhanced technique and analyzed by fluorescence and video microscopy. In interphase, prekinetochores were either single or double structures depending on the stage of the cell cycle but became quadruple (two distinct stained dots on each chromatid) in mid-to-late prophase. In favorable preparations of prometaphase chromosomes, multiple subunits could be resolved within each sister kinetochore suggesting a compound organization. Western blot analysis demonstrated common epitopes in centromeric peptides of HeLa and Haemanthus cell extracts. Although the molecular mass of individual polypeptides differed in the two species, the presence of shared epitopes indicates striking conservation of centromere/kinetochore components throughout evolution.

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Selected References

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