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- W2802929125 abstract "SUMMARY TEX101 is a testis-specific protein expressed exclusively in male germ cells and is a validated biomarker of male infertility. Studies in mice suggest that TEX101 is a cell-surface chaperone which regulates, through protein-protein interactions, the maturation of proteins involved in spermatozoa transit and oocyte binding. Male TEX101-null mice are sterile. Here, we identified by co-immunoprecipitation-mass spectrometry the interactome of human TEX101 in testicular tissues and spermatozoa. The testis-specific cell-surface dipeptidase 3 (DPEP3) emerged as the top hit. We further validated the TEX101-DPEP3 complex by using hybrid immunoassays. Combinations of antibodies recognizing different epitopes of TEX101 and DPEP3 facilitated development of a simple immunoassay to screen for disruptors of TEX101-DPEP3 complex. As a proof-of-a-concept, we demonstrated that anti-TEX101 antibody T4 disrupted the native TEX101-DPEP3 complex. Disrupting antibodies may be used to study the human TEX101-DPEP3 complex, and to develop modulators for male fertility. Non-standard abbreviations TEX101 Testis-expressed sequence 101 protein DPEP3 Dipeptidase 3 AC-MS Affinity capture-mass spectrometry co-IP-MS Coimmunoprecipitation-mass spectrometry GPI Glycosylphosphatidylinositol LFQ Label-free quantification mAb Monoclonal antibody NHS N-hydroxysuccinimide PRM Parallel reaction monitoring PTM Posttranslational modification SP Seminal plasma SRM Selected reaction monitoring FDR false detection rate" @default.
- W2802929125 created "2018-05-17" @default.
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- W2802929125 date "2018-05-07" @default.
- W2802929125 modified "2023-09-24" @default.
- W2802929125 title "Discovery of a human testis-specific protein complex TEX101-DPEP3 and selection of its disrupting antibodies" @default.
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- W2802929125 doi "https://doi.org/10.1101/315713" @default.
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