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Fang J, Tian W, Quintanilla MA, Beach JR, Lerit DA. The PCM scaffold enables RNA localization to centrosomes. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.13.575509. [PMID: 38469150 PMCID: PMC10926663 DOI: 10.1101/2024.01.13.575509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
As microtubule-organizing centers, centrosomes direct assembly of the bipolar mitotic spindle required for chromosome segregation and genome stability. Centrosome activity requires the dynamic assembly of pericentriolar material (PCM), the composition and organization of which changes throughout the cell cycle. Recent studies highlight the conserved localization of several mRNAs encoded from centrosome-associated genes enriched at centrosomes, including Pericentrin-like protein (Plp) mRNA. However, relatively little is known about how RNAs localize to centrosomes and influence centrosome function. Here, we examine mechanisms underlying the subcellular localization of Plp mRNA. We find that Plp mRNA localization is puromycin-sensitive, and the Plp coding sequence is both necessary and sufficient for RNA localization, consistent with a co-translational transport mechanism. We identify regions within the Plp coding sequence that regulate Plp mRNA localization. Finally, we show that protein-protein interactions critical for elaboration of the PCM scaffold permit RNA localization to centrosomes. Taken together, these findings inform the mechanistic basis of Plp mRNA localization and lend insight into the oscillatory enrichment of RNA at centrosomes.
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Affiliation(s)
- Junnan Fang
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322
- Equal contributions
| | - Weiyi Tian
- Equal contributions
- Emory College of Arts and Sciences, Emory University, Atlanta, GA 30322
| | - Melissa A. Quintanilla
- Department of Cell and Molecular Physiology, Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60153
| | - Jordan R. Beach
- Department of Cell and Molecular Physiology, Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60153
| | - Dorothy A. Lerit
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322
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Abdel-Salam GMH, Sayed ISM, Afifi HH, Abdel-Ghafar SF, Abouzaid MR, Ismail SI, Aglan MS, Issa MY, El-Bassyouni HT, El-Kamah G, Effat LK, Eid M, Zaki MS, Temtamy SA, Abdel-Hamid MS. Microcephalic osteodysplastic primordial dwarfism type II: Additional nine patients with implications on phenotype and genotype correlation. Am J Med Genet A 2020; 182:1407-1420. [PMID: 32267100 DOI: 10.1002/ajmg.a.61585] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 02/20/2020] [Accepted: 03/09/2020] [Indexed: 11/10/2022]
Abstract
PCNT encodes a large coiled- protein localizing to pericentriolar material and is associated with microcephalic osteodysplastic primordial dwarfism type II syndrome (MOPD II). We report our experience of nine new patients from seven unrelated consanguineous Egyptian families with the distinctive clinical features of MOPD II in whom a customized NGS panel showed homozygous truncating variants of PCNT. The NGS panel results were validated thereafter using Sanger sequencing revealing three previously reported and three novel PCNT pathogenic variants. The core phenotype appeared homogeneous to what had been reported before although patients differed in the severity showing inter and intra familial variability. The orodental pattern showed atrophic alveolar ridge (five patients), rootless tooth (four patients), tooth agenesis (three patients), and malformed tooth (three patients). In addition, mesiodens was a novel finding found in one patient. The novel c.9394-1G>T variant was found in two sibs who had tooth agenesis. CNS anomalies with possible vascular sequelae were documented in two male patients (22.2%). Simplified gyral pattern with poor development of the frontal horns of lateral ventricles was seen in four patients and mild thinning of the corpus callosum in two patients. Unilateral coronal craniosynstosis was noted in one patient and thick but short corpus callosum was an unusual finding noted in another. The later has not been reported before. Our results refine the clinical, neuroradiological, and orodental features and expand the molecular spectrum of MOPD II.
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Affiliation(s)
- Ghada M H Abdel-Salam
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt.,Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt
| | - Inas S M Sayed
- Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt.,Orodental Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
| | - Hanan H Afifi
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt.,Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt
| | - Sherif F Abdel-Ghafar
- Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt.,Medical Molecular Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
| | - Maha R Abouzaid
- Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt.,Orodental Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
| | - Samira I Ismail
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt.,Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt
| | - Mona S Aglan
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt.,Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt
| | - Mahmoud Y Issa
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt.,Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt
| | - Hala T El-Bassyouni
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt.,Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt
| | - Ghada El-Kamah
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt.,Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt
| | - Laila K Effat
- Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt.,Medical Molecular Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
| | - Maha Eid
- Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt.,Human Cytogenetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
| | - Maha S Zaki
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt.,Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt
| | - Samia A Temtamy
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt.,Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt
| | - Mohamed S Abdel-Hamid
- Centre of Excellence for Human Genetics, National Research Centre, Cairo, Egypt.,Medical Molecular Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
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