These little junctions, that is, nuclear pore – mitochondrial associations, have been fascinating to me.  I have noticed and photographed (whether ideally fixed, or in focus, or in this species or that cell type, just as many as i can) to try someday to figure out what tasks they are carrying out. The obvious of course, providing energy, maybe for nucleo-cytoplasmic transport, but maybe too for nuclear rotation, as we all know happens from observing those old time lapse videos of tissue culture cells with mitochondria dancing close to the nucleus and the nucleus spinning  — ha ha – new question, to nuclei on the northern hemisphere rotate the same way as nuclei cultured in the southern hemisphere?) and also for nuclear shaping, but importantly, do they have something to do with chromosome territories? That is, something more than just an indirect influence like shape or transporting molecules.  Might they participate in the transport of ions through the outer pore areas as well as the core.  Might they influence assembly and repositioning of nuclear pores, making and or breaking them.

This particular nuclear pore-mitochondrial association is not the best micrograph in the world by a long shot, but it is from a heterozygous animal conditional ko of  Gclc in the liver (wc/ii) so has some increase in oxidative stress.

The original micrograph is on the left taken at 9500x, neg 17535 block 73458 anm# 505 wt hepatocyte.  filaments (wiggly lines) going up toward the mitochondria (top shaded grey) are prominent , the nuclear basket is not prominent, and something looks to be a pattern underneath the pore (black oval) that would likely be some tangential portion of the nuclear membrane (not hazarding a guess as to whether outer or inner.