RT Journal Article SR Electronic T1 Quantitative analysis of nuclear pore complex organization in Schizosaccharomyces pombe JF Life Science Alliance JO Life Sci. Alliance FD Life Science Alliance LLC SP e202201423 DO 10.26508/lsa.202201423 VO 5 IS 7 A1 Joseph M Varberg A1 Jay R Unruh A1 Andrew J Bestul A1 Azqa A Khan A1 Sue L Jaspersen YR 2022 UL https://www.life-science-alliance.org/content/5/7/e202201423.abstract AB The number, distribution, and composition of nuclear pore complexes (NPCs) in the nuclear envelope varies between cell types and changes during cellular differentiation and in disease. To understand how NPC density and organization are controlled, we analyzed the NPC number and distribution in the fission yeast Schizosaccharomyces pombe using structured illumination microscopy. The small size of yeast nuclei, genetic features of fungi, and our robust image analysis pipeline allowed us to study NPCs in intact nuclei under multiple conditions. Our data revealed that NPC density is maintained across a wide range of nuclear sizes. Regions of reduced NPC density are observed over the nucleolus and surrounding the spindle pole body (SPB). Lem2-mediated tethering of the centromeres to the SPB is required to maintain NPC exclusion near SPBs. These findings provide a quantitative understanding of NPC number and distribution in S. pombe and show that interactions between the centromere and the nuclear envelope influences local NPC distribution.