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Background and purpose: Transmembrane and coiled-coil domains 1 (TMCO1) is a recently discovered endoplasmic reticulum calcium channel protein that has been found to be associated with the progression of various tumors, however, its role in cervical cancer has not yet been clarified. This study aimed to investigate the effects of TMCO1 on the proliferation and migration of cervical cancer HeLa cells. Methods: By transfecting cervical cancer HeLa cells with plasmids, cells with stable overexpression of TMCO1 and cells with stable knockdown of TMCO1 were obtained. Cell counting kit-8 (CCK-8) assay, clone formation assay and EdU labeling assay were used to detect cell proliferation ability, transwell assay was used to detect cell migration ability, and proteomic analysis was performed on the cells that stably overexpressed TMCO1 and control cells. Results: TThe CCK-8 experiment and clone formation experiment showed that overexpression of TMCO1 in cervical cancer HeLa cells significantly increased their proliferation ability (P