Work

C. elegans nucleolar RG repeats are sufficient for nucleolar accumulation but insufficient for sub-nucleolar compartmentalization

Year: 2024

Type: preprint

Abstract: ABSTRACT Intrinsically disordered arginine-glycine (RG) repeat domains are enriched in multilayered biomolecular condensates such as the nucleolus. C. elegans nucleolar RG repeats are dispensable for nucleolar accumulation and instead contribute to the organization of sub-nucleolar compartments. The sufficiency of RG repeats to facilitate sub-nucleolar compartmentalization is unclear. In this study, we drive expression of full-length RG repeats in the C. elegans germline to test their ability to localize to nucleoli and organize into nucleolar sub-compartments in vivo . We find that repeats accumulate within germ cell nucleoli but do not enrich in the correct sub-compartment. Our results suggest RG repeats may indirectly influence nucleolar organization by creating an environment favorable for sub-nucleolar compartmentalization of proteins primarily based on their function within the nucleolus.

Source: bioRxiv (Cold Spring Harbor Laboratory)

DOI: 10.1101/2024.12.19.629445

Authors: Emily L. Spaulding, Dustin L. Updike

Institution: Mount Desert Island Biological Laboratory

Language: English

Topic: Nuclear Structure and Function

Subfield: Molecular Biology

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

Open Access status: green

Funder: National Institute of General Medical Sciences

Award: The Maine Biomedical Research Network (INBRE)