Drawing on perceived organizational support (POS) theory and employee–organizational relationship theories, this research investigated the association between POS and knowledge sharing as well as the potential moderating effects of perceived job security. Study participants were 255 information technology professionals and their supervisors working in the information technology industry in China. Findings showed that POS was positively related to knowledge sharing, and, as expected, perceived job security moderated the association. More specifically, the positive association between POS and employee knowledge sharing held only for employees who perceived higher job security from their organization. In contrast, POS was not significantly associated with knowledge sharing when employees perceived their job security to be relatively low. This latter result is consistent with contentions from employee–organizational relationships theories that limited investment by employers is likely to lead to lower contributions from employees. The findings are also congruent with arguments from social exchange theory that meaningful reciprocity is built on a history of open‐ended exchanges whose development may be inconsistent with a shorter‐term employment horizon.

Homologous recombination (HR), which mediates the repair of DNA double-strand breaks (DSB), is crucial for maintaining genomic integrity and enhancing survival in response to chemotherapy and radiotherapy in human cancers. However, the mechanisms of HR repair in treatment resistance for the improvement of cancer therapy remains unclear. Here, we report that the zinc finger protein 830 (ZNF830) promotes HR repair and the survival of cancer cells in response to DNA damage. Mechanistically, ZNF830 directly participates in DNA end resection via interacting with CtIP and regulating CtIP recruitment to DNA damage sites. Moreover, the recruitment of ZNF830 at DNA damage sites is dependent on its phosphorylation at serine 362 by ATR. ZNF830 directly and preferentially binds to double-strand DNA with its 3′ or 5′ overhang through the Zinc finger (Znf) domain, facilitating HR repair and maintaining genome stability. Thus, our study identified a novel function of ZNF830 as a HR repair regulator in DNA end resection, conferring the chemoresistance to genotoxic therapy for cancers those that overexpress ZNF830.

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