article published yes Martin W HETZER author 86c0d31b-b4eb-11ec-ac5a-eae7b2e135ed0000-0002-2111-992X Hemmo H. Meyer author Tobias C. Walther author Daniel Bilbao-Cortes author Graham Warren author Iain W. Mattaj author Although nuclear envelope (NE) assembly is known to require the GTPase Ran, the membrane fusion machinery involved is uncharacterized. NE assembly involves formation of a reticular network on chromatin, fusion of this network into a closed NE and subsequent expansion. Here we show that p97, an AAA-ATPase previously implicated in fusion of Golgi and transitional endoplasmic reticulum (ER) membranes together with the adaptor p47, has two discrete functions in NE assembly. Formation of a closed NE requires the p97–Ufd1–Npl4 complex, not previously implicated in membrane fusion. Subsequent NE growth involves a p97–p47 complex. This study provides the first insights into the molecular mechanisms and specificity of fusion events involved in NE formation. Springer Nature2001 eng Cell Biology 1465-7392 1476-4679 1178157010.1038/ncb1201-1086 3121086-1091 yes Hetzer M, Meyer HH, Walther TC, Bilbao-Cortes D, Warren G, Mattaj IW. Distinct AAA-ATPase p97 complexes function in discrete steps of nuclear assembly. <i>Nature Cell Biology</i>. 2001;3(12):1086-1091. doi:<a href="https://doi.org/10.1038/ncb1201-1086">10.1038/ncb1201-1086</a> M. Hetzer, H.H. Meyer, T.C. Walther, D. Bilbao-Cortes, G. Warren, I.W. Mattaj, Nature Cell Biology 3 (2001) 1086–1091. M. Hetzer, H. H. Meyer, T. C. Walther, D. Bilbao-Cortes, G. Warren, and I. W. Mattaj, “Distinct AAA-ATPase p97 complexes function in discrete steps of nuclear assembly,” <i>Nature Cell Biology</i>, vol. 3, no. 12. Springer Nature, pp. 1086–1091, 2001. Hetzer, Martin, et al. “Distinct AAA-ATPase P97 Complexes Function in Discrete Steps of Nuclear Assembly.” <i>Nature Cell Biology</i>, vol. 3, no. 12, Springer Nature, 2001, pp. 1086–91, doi:<a href="https://doi.org/10.1038/ncb1201-1086">10.1038/ncb1201-1086</a>. Hetzer, Martin, Hemmo H. Meyer, Tobias C. Walther, Daniel Bilbao-Cortes, Graham Warren, and Iain W. Mattaj. “Distinct AAA-ATPase P97 Complexes Function in Discrete Steps of Nuclear Assembly.” <i>Nature Cell Biology</i>. Springer Nature, 2001. <a href="https://doi.org/10.1038/ncb1201-1086">https://doi.org/10.1038/ncb1201-1086</a>. Hetzer, M., Meyer, H. H., Walther, T. C., Bilbao-Cortes, D., Warren, G., &#38; Mattaj, I. W. (2001). Distinct AAA-ATPase p97 complexes function in discrete steps of nuclear assembly. <i>Nature Cell Biology</i>. Springer Nature. <a href="https://doi.org/10.1038/ncb1201-1086">https://doi.org/10.1038/ncb1201-1086</a> Hetzer M, Meyer HH, Walther TC, Bilbao-Cortes D, Warren G, Mattaj IW. 2001. Distinct AAA-ATPase p97 complexes function in discrete steps of nuclear assembly. Nature Cell Biology. 3(12), 1086–1091. 111252022-04-07T07:57:42Z2022-07-18T08:58:07Z