{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nNEDD1 is an evolutionarily conserved WD40‐repeat protein that functions as a critical adaptor within the γ–tubulin ring complex (γTuRC). By directly binding to γ–tubulin via a small, helical C–terminal domain, NEDD1 is essential for targeting the γTuRC to centrosomes and mitotic spindles, thereby ensuring proper microtubule nucleation, spindle assembly, and accurate chromosome segregation during cell division. Such targeting guarantees that even when the γTuRC remains intact, its spatial localization is finely regulated to support the dynamic architecture of the mitotic apparatus."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "4"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nThe function of NEDD1 is tightly controlled by sequential phosphorylation events mediated by several key mitotic kinases. Phosphorylation by Cdk1 creates binding sites that allow Plk1 to further modify NEDD1, while kinases such as Aurora A, Nek9, and PLK4 also contribute to the regulation of its binding affinity and centrosomal recruitment. Specific phospho–residues—including sites within the S557–S574 stretch, as well as Ser377 and Ser405—modulate its interaction with γ–tubulin, thereby orchestrating centrosome maturation, balanced microtubule nucleation from both the centrosomes and chromatin, and even the initiation of daughter centriole biogenesis."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "5", "end_ref": "9"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn addition to its centrosomal roles, NEDD1 is central to microtubule amplification mechanisms within the spindle. By interacting with spindle-associated proteins such as FAM29A, it facilitates a γ–tubulin–dependent microtubule-dependent microtubule polymerization pathway that enhances kinetochore fiber formation and contributes to central spindle assembly. This function is indispensable for both the efficient establishment of a bipolar spindle and the subsequent formation of the central spindle required for sister chromatid separation during mitosis."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "10", "end_ref": "12"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nMoreover, aberrant NEDD1 function has clinical implications. In cancer models, particularly in studies of scirrhous gastric cancer with peritoneal metastasis, RNA interference targeting NEDD1 disrupts centrosomal microtubule nucleation and centriole duplication, leading to spindle defects and improved survival outcomes. This highlights NEDD1 not only as a pivotal regulator of mitotic spindle dynamics but also as a potential therapeutic target in malignancies characterized by abnormal cell division."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "13"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Jens Lüders, Urvashi K Patel, Tim Stearns "}, {"type": "b", "children": [{"type": "t", "text": "GCP-WD is a gamma-tubulin targeting factor required for centrosomal and chromatin-mediated microtubule nucleation."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Nat Cell Biol (2006)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1038/ncb1349"}], "href": "https://doi.org/10.1038/ncb1349"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "16378099"}], "href": "https://pubmed.ncbi.nlm.nih.gov/16378099"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Laurence Haren, Marie-Hélène Remy, Ingrid Bazin, et al. "}, {"type": "b", "children": [{"type": "t", "text": "NEDD1-dependent recruitment of the gamma-tubulin ring complex to the centrosome is necessary for centriole duplication and spindle assembly."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Cell Biol (2006)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1083/jcb.200510028"}], "href": "https://doi.org/10.1083/jcb.200510028"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "16461362"}], "href": "https://pubmed.ncbi.nlm.nih.gov/16461362"}]}, {"type": "r", "ref": 3, "children": [{"type": "t", "text": "Jantina A Manning, Sonia Shalini, Joanna M Risk, et al. 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