Mass-spectrometrical analysis of proteins encoded on chromosome 21 in human fetal brain |
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Authors: | J-H Shin K Krapfenbauer G Lubec |
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Institution: | (1) Department of Pediatrics, Medical University of Vienna, Vienna, Austria;(2) Genomics and Proteomics Department, CNS Preclinical Research, F. Hoffmann-La Roche, Basel, Switzerland |
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Abstract: | Summary. Overexpression of chromosome 21 genes is directly or indirectly responsible for the Down syndrome phenotype. In order to analyse
chromosome 21 gene products (Chr21Ps), we extracted proteins from fetal human brain cortex and applied an ultracentrifugal
and chromatographic prefractionation principle followed by two-dimensional gel electrophoresis (2-DE) and mass-spectrometrical
analysis using high-throughput automated MALDI-TOF/TOF. Nine Chr21Ps were identified: pyridoxal kinase; superoxide dismutase
Cu/Zn] 1; carbonyl reductase 1; ES1 protein homolog, mitochondrial Precursor]; cystathionine-beta-synthetase; T-complex
protein 1, theta subunit; cystatin B; 6-phosphofructokinase; glycinamide ribonucleotide synthetase. Mass-spectrometric characterisation
of Chr21Ps following separation in 2-DE gels is a useful tool for the analysis of these structures in brain, independent of
antibody availability and specificity. |
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Keywords: | : Human fetal brain – Human chromosome 21 – Ion-exchange chromatography – Two-dimensional gel electrophoresis – MALDI-TOF/TOF |
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