CENPQ(Centromere Protein Q)是一种与细胞分裂密切相关的蛋白质,属于着丝粒蛋白家族(CENP家族),该家族成员主要参与染色体的正确分离和有丝分裂的调控。CENPQ定位于着丝粒区域,在染色体组装和纺锤体微管附着过程中发挥关键作用,确保遗传物质在细胞分裂时均等分配到子细胞中。CENP家族的共性包括维持着丝粒结构完整性、介导动粒与微管的连接以及监控有丝分裂检查点,防止非整倍体(染色体数目异常)的发生。CENPQ的功能缺失或突变可能导致染色体分离错误,引发基因组不稳定性,进而与癌症(如乳腺癌、结直肠癌)及发育障碍(如小头畸形)相关。若CENPQ表达降低,细胞可能出现染色体错配、非整倍体增加或分裂延迟,最终触发细胞凋亡;而过表达可能干扰正常着丝粒功能,导致异常微管附着或检查点逃逸,促进肿瘤进展。研究还发现CENPQ与其他CENP成员(如CENPA、CENPH)协同作用,共同维持着丝粒复合体的稳定性。目前针对CENPQ的调控机制仍在探索中,但其作为有丝分裂关键分子的特性,使其成为癌症治疗潜在靶点。
CENPQ is a subunit of a CENPH (MIM 605607)-CENPI (MIM 300065)-associated centromeric complex that targets CENPA (MIM 117139) to centromeres and is required for proper kinetochore function and mitotic progression (Okada et al., 2006 [PubMed 16622420]).[supplied by OMIM, Mar 2008]
Subcellular localization of CENPQ (and its protein):
Gene Ontology (GO) terms for CENPQ:
| Interacting Gene | Interaction | Source/Score |
| Name |
|---|
| Cell Cycle |
| Cell Cycle, Mitotic |
| Chromosome Maintenance |
| Deposition of new CENPA-containing nucleosomes at the centromere |
| M Phase |
| Mitotic Anaphase |
| Mitotic Metaphase and Anaphase |
| Mitotic Prometaphase |
| Nucleosome assembly |
| Resolution of Sister Chromatid Cohesion |
| RHO GTPase Effectors |
| RHO GTPases Activate Formins |
| Separation of Sister Chromatids |
| Signal Transduction |
| Signaling by Rho GTPases |
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