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Validating missing proteins in human sperm cells by targeted mass-spectrometry- and antibody-based methods

Carapito, Christine
Duek, Paula
Macron, Charlotte
Seffals, Marine
Rondel, Karine
Delalande, François
Lindskog, Cecilia
Fréour, Thomas
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Published in Journal of Proteome Research. 2017, vol. 16, no. 12, p. 4340-4351
Abstract The present study is a contribution to the "neXt50 challenge", a coordinated effort across C-HPP teams to identify the 50 most tractable missing proteins (MPs) on each chromosome. We report the targeted search of 38 theoretically detectable MPs from chromosomes 2 and 14 in Triton X-100 soluble and insoluble sperm fractions from a total of 15 healthy donors. A targeted mass-spectrometry-based strategy consisting of the development of LC-PRM assays (with heavy labeled synthetic peptides) targeting 92 proteotypic peptides of the 38 selected MPs was used. Out of the 38 selected MPs, 12 were identified with two or more peptides and 3 with one peptide after extensive SDS-PAGE fractionation of the two samples and with overall low-intensity signals. The PRM data are available via ProteomeXchange in PASSEL (PASS01013). Further validation by immunohistochemistry on human testes sections and cytochemistry on sperm smears was performed for eight MPs with antibodies available from the Human Protein Atlas. Deep analysis of human sperm still allows the validation of MPs and therefore contributes to the C-HPP worldwide effort. We anticipate that our results will be of interest to the reproductive biology community because an in-depth analysis of these MPs may identify potential new candidates in the context of human idiopathic infertilities.
Keywords AntibodiesChromosomesHumanPair 14/geneticsChromosomesHumanPair 2/geneticsHistocytochemistryHumansImmunohistochemistryMaleOctoxynolProteome/analysisSpermatozoa/chemistryTandem Mass SpectrometryTestis/chemistry
PMID: 28891297
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Research group Calipho (80)
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CARAPITO, Christine et al. Validating missing proteins in human sperm cells by targeted mass-spectrometry- and antibody-based methods. In: Journal of Proteome Research, 2017, vol. 16, n° 12, p. 4340-4351. doi: 10.1021/acs.jproteome.7b00374 https://archive-ouverte.unige.ch/unige:124367

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Deposited on : 2019-10-15

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