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ZATELLITE: a toolkit to visualize and manipulate human centromeres in live cells using synthetic zinc fingers

Saiz, N.; Goldberg, A.; Clark, F. T.; Tong, G.; Kogenaru, M.; Whitney, P. H.; Abdin, O.; Alfieri, F.; Kim, P. M.; Logsdon, G. A.; Holt, L. J.; Boeke, J. D.; Noyes, M. B.; Davoli, T. D.; Lionnet, T.

2026-08-05 cell biology
10.64898/2026.08.04.742839 bioRxiv
Show abstract

Changes in the number of chromosomes or their spatial organization within the nucleus have critical consequences for cell fate. Yet capturing the karyotype or three-dimensional architecture of chromatin in living cells remains limited by the difficulty in labeling endogenous loci non-invasively. The most widely used tools rely on dCas9, a bulky protein whose persistent DNA binding interferes with DNA and RNA metabolism, causes DNA damage, and is hard to multiplex. We developed ZATELLITE, an AI-enabled tool to target endogenous repetitive sequences with fluorescently-tagged synthetic zinc fingers. ZATELLITE probes have key advantages over dCas9: they are smaller, easier to multiplex and, critically, they do not cause DNA damage or chromosomal abnormalities, even after long-term labeling. We generated a collection of ZATELLITE probes to label the centromeres of nearly all human chromosomes, enabling the capture of genome organization and karyotype alterations in real time in living cells. Finally, we show that ZATELLITE can be used for simultaneous labeling and epigenetic editing of centromeres. Thus, ZATELLITE is a non-toxic, versatile tool for genome visualization and manipulation.

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"Similar papers" are the closest papers from that journal in the model's embedding space. They show what the match is built on, but the ranking comes mostly from a classifier over the whole training set, not from these examples alone.