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6 results on '"Cooke, Sophie L"'

1. Pathogenic variants in SLF2 and SMC5 cause segmented chromosomes and mosaic variegated hyperploidy

Author

Grange, Laura J., Reynolds, John J., Ullah, Farid, Isidor, Bertrand, Shearer, Robert F., Latypova, Xenia, Baxley, Ryan M., Oliver, Antony W., Ganesh, Anil, Cooke, Sophie L., Jhujh, Satpal S., McNee, Gavin S., Hollingworth, Robert, Higgs, Martin R., Natsume, Toyoaki, Khan, Tahir, Martos-Moreno, Gabriel Á., Chupp, Sharon, Mathew, Christopher G., Parry, David, Simpson, Michael A., Nahavandi, Nahid, Yüksel, Zafer, Drasdo, Mojgan, Kron, Anja, Vogt, Petra, Jonasson, Annemarie, Seth, Saad Ahmed, Gonzaga-Jauregui, Claudia, Brigatti, Karlla W., Stegmann, Alexander P. A., Kanemaki, Masato, Josifova, Dragana, Uchiyama, Yuri, Oh, Yukiko, Morimoto, Akira, Osaka, Hitoshi, Ammous, Zineb, Argente, Jesús, Matsumoto, Naomichi, Stumpel, Constance T.R.M., Taylor, Alexander M. R., Jackson, Andrew P., Bielinsky, Anja-Katrin, Mailand, Niels, Le Caignec, Cedric, Davis, Erica E., and Stewart, Grant S.

Published
2022
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3. RECON syndrome is a genome instability disorder caused by mutations in the DNA helicase RECQL1

Author

Abu-Libdeh, Bassam, Jhujh, Satpal S., Dhar, Srijita, Sommers, Joshua A., Datta, Arindam, Longo, Gabriel M.C., Grange, Laura J., Reynolds, John J., Cooke, Sophie L., McNee, Gavin S., Hollingworth, Robert, Woodward, Beth L., Ganesh, Anil N., Smerdon, Stephen J., Nicolae, Claudia M., Durlacher-Betzer, Karina, Molho-Pessach, Vered, Abu-Libdeh, Abdulsalam, Meiner, Vardiella, Moldovan, George-Lucian, Roukos, Vassilis, Harel, Tamar, Brosh, Robert M., Jr., and Stewart, Grant S.

Subjects
Gene mutations -- Research, Genetic disorders -- Causes of, Medical research, Medicine, Experimental, DNA -- Structure -- Health aspects, Helicases -- Health aspects -- Genetic aspects, Health care industry
Abstract

Despite being the first homolog of the bacterial RecQ helicase to be identified in humans, the function of RECQL1 remains poorly characterized. Furthermore, unlike other members of the human RECQ family of helicases, mutations in RECQL1 have not been associated with a genetic disease. Here, we identify 2 families with a genome instability disorder that we have named RECON (RECql ONe) syndrome, caused by biallelic mutations in the RECQL gene. The affected individuals had short stature, progeroid facial features, a hypoplastic nose, xeroderma, and skin photosensitivity and were homozygous for the same missense mutation in RECQL1 (p.Ala459Ser), located within its zinc binding domain. Biochemical analysis of the mutant RECQL1 protein revealed that the p.A459S missense mutation compromised its ATPase, helicase, and fork restoration activity, while its capacity to promote single-strand DNA annealing was largely unaffected. At the cellular level, this mutation in RECQL1 gave rise to a defect in the ability to repair DNA damage induced by exposure to topoisomerase poisons and a failure of DNA replication to progress efficiently in the presence of abortive topoisomerase lesions. Taken together, RECQL1 is the fourth member of the RecQ family of helicases to be associated with a human genome instability disorder., Introduction DNA helicases are ubiquitous enzymes found in most uni- and multicellular organisms and function to unwind DNA in an ATP-dependent and direction-specific manner. The ability to unwind DNA is [...]

Published
2022
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4. Pathogenic variants in SLF2 and SMC5 cause segmented chromosomes and mosaic variegated hyperploidy

Author

Grange, Laura J, Reynolds, John J, Ullah, Farid, Isidor, Bertrand, Shearer, Robert F, Latypova, Xenia, Baxley, Ryan M, Oliver, Antony W, Ganesh, Anil, Cooke, Sophie L, Jhujh, Satpal S, McNee, Gavin S, Hollingworth, Robert, Higgs, Martin R, Natsume, Toyoaki, Khan, Tahir, Martos-Moreno, Gabriel Á., Chupp, Sharon, Mathew, Christopher G., Parry, David, Simpson, Michael A., Nahavandi, Nahid, Yüksel, Zafer, Drasdo, Mojgan, Kron, Anja, Vogt, Petra, Jonasson, Annemarie, Seth, Saad Ahmed, Gonzaga-Jauregui, Claudia, Brigatti, Karlla W, Stegmann, Alexander P A, Kanemaki, Masato, Josifova, Dragana, Uchiyama, Yuri, Oh, Yukiko, Morimoto, Akira, Osaka, Hitoshi, Ammous, Zineb, Argente, Jesús, Matsumoto, Naomichi, Stumpel, Constance T.R.M., Taylor, Alexander M.R., Jackson, Andrew P., Bielinsky, Anja-Katrin, Mailand, Niels, Le Caignec, Cedric, Davis, Erica E., Stewart, Grant S., Grange, Laura J, Reynolds, John J, Ullah, Farid, Isidor, Bertrand, Shearer, Robert F, Latypova, Xenia, Baxley, Ryan M, Oliver, Antony W, Ganesh, Anil, Cooke, Sophie L, Jhujh, Satpal S, McNee, Gavin S, Hollingworth, Robert, Higgs, Martin R, Natsume, Toyoaki, Khan, Tahir, Martos-Moreno, Gabriel Á., Chupp, Sharon, Mathew, Christopher G., Parry, David, Simpson, Michael A., Nahavandi, Nahid, Yüksel, Zafer, Drasdo, Mojgan, Kron, Anja, Vogt, Petra, Jonasson, Annemarie, Seth, Saad Ahmed, Gonzaga-Jauregui, Claudia, Brigatti, Karlla W, Stegmann, Alexander P A, Kanemaki, Masato, Josifova, Dragana, Uchiyama, Yuri, Oh, Yukiko, Morimoto, Akira, Osaka, Hitoshi, Ammous, Zineb, Argente, Jesús, Matsumoto, Naomichi, Stumpel, Constance T.R.M., Taylor, Alexander M.R., Jackson, Andrew P., Bielinsky, Anja-Katrin, Mailand, Niels, Le Caignec, Cedric, Davis, Erica E., and Stewart, Grant S.

Abstract

Embryonic development is dictated by tight regulation of DNA replication, cell division and differentiation. Mutations in DNA repair and replication genes disrupt this equilibrium, giving rise to neurodevelopmental disease characterized by microcephaly, short stature and chromosomal breakage. Here, we identify biallelic variants in two components of the RAD18-SLF1/2-SMC5/6 genome stability pathway, SLF2 and SMC5, in 11 patients with microcephaly, short stature, cardiac abnormalities and anemia. Patient-derived cells exhibit a unique chromosomal instability phenotype consisting of segmented and dicentric chromosomes with mosaic variegated hyperploidy. To signify the importance of these segmented chromosomes, we have named this disorder Atelís (meaning - incomplete) Syndrome. Analysis of Atelís Syndrome cells reveals elevated levels of replication stress, partly due to a reduced ability to replicate through G-quadruplex DNA structures, and also loss of sister chromatid cohesion. Together, these data strengthen the functional link between SLF2 and the SMC5/6 complex, highlighting a distinct role for this pathway in maintaining genome stability.

Published
2022

6. Discovery and In VivoEfficacy of AZ-PRMT5i-1, a Novel PRMT5 Inhibitor with High MTA Cooperativity

Author

Smith, James M., Barlaam, Bernard, Beattie, David, Bradshaw, Lauren, Chan, Ho Man, Chiarparin, Elisabetta, Collingwood, Olga, Cooke, Sophie L., Cronin, Anna, Cumming, Iain, Dean, Emma, Debreczeni, Judit É., del Barco Barrantes, Iván, Diene, Coura, Gianni, Davide, Guerot, Carine, Guo, Xiaoxiao, Guven, Sinem, Hayhow, Thomas G., Hong, Ted, Kemmitt, Paul D., Lamont, Gillian M., Lamont, Scott, Lynch, James T., McWilliams, Lisa, Moore, Shaun, Raubo, Piotr, Robb, Graeme R., Robinson, James, Scott, James S., Srinivasan, Bharath, Steward, Oliver, Stubbs, Christopher J., Syson, Karl, Tan, Lixiang, Turner, Oliver, Underwood, Elizabeth, Urosevic, Jelena, Vazquez-Chantada, Mercedes, Whittaker, Amy L., Wilson, David M., and Winter-Holt, Jon J.

Abstract

PRMT5, a type 2 arginine methyltransferase, has a critical role in regulating cell growth and survival in cancer. With the aim of developing MTA-cooperative PRMT5 inhibitors suitable for MTAP-deficient cancers, herein we report our efforts to develop novel “MTA-cooperative” compounds identified through a high-throughput biochemical screening approach. Optimization of hits was achieved through structure-based design with a focus on improvement of oral drug-like properties. Bioisosteric replacement of the original thiazole guanidine headgroup, spirocyclization of the isoindolinone amide scaffold to both configurationally and conformationally lock the bioactive form, and fine-tuning of the potency, MTA cooperativity, and DMPK properties through specific substitutions of the azaindole headgroup were conducted. We have identified an orally available in vivolead compound, 28(“AZ-PRMT5i-1”), which shows sub-10 nM PRMT5 cell potency, >50-fold MTA cooperativity, suitable DMPK properties for oral dosing, and significant PRMT5-driven in vivoefficacy in several MTAP-deficient preclinical cancer models.

Published
2024
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