Ribosome biogenesis, beyond being a critical requirement for growth in all eukaryotic cells, has a broad impact on the etiology of numerous human disorders. Human genetic diseases caused by mutations in structural components of the ribosome or in factors required to make ribosomes in the cell nucleolus are called ribosomopathies. These largely congenital disorders present with a variety of morbidities: bone marrow failure, liver cirrhosis, pancreatic insufficiency, craniofacial dysmorphology and skin abnormalities. The pathogenesis of cancer, too, is linked to changes in nucleolar morphology and function. Because decreased nucleolar function can abrogate tumorigenicity, rRNA transcription and ribosome biogenesis have recently emerged as attractive new targets for anticancer therapies. Despite the clear impact of abnormalities in ribosome biogenesis on human disease, human ribosome biogenesis and the mechanisms behind the diverse ribosomopathies are just beginning to be investigated and elucidated. Our long-term goal is to understand how the architecture and function of the cell nucleolus relates to rare human genetic diseases and drives cancer. The objective of this application is to undertake a focused, in-depth approach to investigate the molecular basis of a putative ribosomopathy, North American Indian Childhood Cirrhosis (NAIC), and in doing so further probe how ribosomes are made in human cells. NAIC is a recessive congenital disease present in a First Nations Canadian population that maps to a R565W mutation in hUTP4/Cirhin, a protein first described in my laboratory in yeast. We propose: 1) To test the hypothesis that the mutation causative in NAIC leads to defective ribosome biogenesis in human cells; 2) To probe the mechanism by which defects in ribosome biogenesis caused by depletion or mutation of hUTP4/Cirhin lead to disease and 3) To test whether depletion or mutation of UTP4/Cirhin results in defects in organ development in vivo in the model organism, Xenopus tropicalis. These three Specific Aims are designed to pursue fundamental questions that will reveal how ribosomes are made in human cells and in an animal model through the lens of a human disease.

Public Health Relevance

This proposal is designed to answer important questions about the function and organization of protein and RNA-protein complexes that are required to make ribosomes, the cellular factories that synthesize proteins in all human cells. In particular, we will study proteins that have been implicated in the pathogenesis of a recessive human genetic disease, North American Indian Childhood Cirrhosis. A more thorough understanding of these processes will help us design better therapies.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM115710-03
Application #
9281554
Study Section
Molecular Genetics B Study Section (MGB)
Program Officer
Bender, Michael T
Project Start
2015-09-01
Project End
2019-05-31
Budget Start
2017-06-01
Budget End
2018-05-31
Support Year
3
Fiscal Year
2017
Total Cost
$357,758
Indirect Cost
$141,758
Name
Yale University
Department
Biochemistry
Type
Schools of Medicine
DUNS #
043207562
City
New Haven
State
CT
Country
United States
Zip Code
06520
Vincent, Nicholas G; Charette, J Michael; Baserga, Susan J (2018) The SSU processome interactome in Saccharomyces cerevisiae reveals novel protein subcomplexes. RNA 24:77-89
Frankowski, Kevin J; Wang, Chen; Patnaik, Samarjit et al. (2018) Metarrestin, a perinucleolar compartment inhibitor, effectively suppresses metastasis. Sci Transl Med 10:
Farley-Barnes, Katherine I; McCann, Kathleen L; Ogawa, Lisa M et al. (2018) Diverse Regulators of Human Ribosome Biogenesis Discovered by Changes in Nucleolar Number. Cell Rep 22:1923-1934
Sondalle, Samuel B; Baserga, Susan J (2017) Ribosomes Need Straight A's to Sleep. Cell 169:565-567
Ogawa, L M; Baserga, S J (2017) Crosstalk between the nucleolus and the DNA damage response. Mol Biosyst 13:443-455
Tao, T; Sondalle, S B; Shi, H et al. (2017) The pre-rRNA processing factor DEF is rate limiting for the pathogenesis of MYCN-driven neuroblastoma. Oncogene 36:3852-3867
Boyden, Lynn M; Vincent, Nicholas G; Zhou, Jing et al. (2017) Mutations in KDSR Cause Recessive Progressive Symmetric Erythrokeratoderma. Am J Hum Genet 100:978-984
Paolini, Nahuel A; Attwood, Martin; Sondalle, Samuel B et al. (2017) A Ribosomopathy Reveals Decoding Defective Ribosomes Driving Human Dysmorphism. Am J Hum Genet 100:506-522
Yip, W S Vincent; Shigematsu, Hideki; Taylor, David W et al. (2016) Box C/D sRNA stem ends act as stabilizing anchors for box C/D di-sRNPs. Nucleic Acids Res 44:8976-8989
Farley, Katherine I; Baserga, Susan J (2016) Probing the mechanisms underlying human diseases in making ribosomes. Biochem Soc Trans 44:1035-44

Showing the most recent 10 out of 13 publications