Molecular and Cellular Biology最新文献

筛选
英文 中文
De Novo Missense Variations of ATP8B2 Impair Its Phosphatidylcholine Flippase Activity. ATP8B2 的新缺义变异会削弱其磷脂酰胆碱翻转酶活性
IF 3.2 2区 生物学
Molecular and Cellular Biology Pub Date : 2024-01-01 Epub Date: 2024-09-02 DOI: 10.1080/10985549.2024.2391829
Hiroyuki Takatsu, Narumi Nishimura, Yusuke Kosugi, Haruo Ogawa, Kazuhisa Nakayama, Estelle Colin, Konrad Platzer, Rami Abou Jamra, Silke Redler, Clément Prouteau, Alban Ziegler, Hye-Won Shin
{"title":"<i>De Novo</i> Missense Variations of ATP8B2 Impair Its Phosphatidylcholine Flippase Activity.","authors":"Hiroyuki Takatsu, Narumi Nishimura, Yusuke Kosugi, Haruo Ogawa, Kazuhisa Nakayama, Estelle Colin, Konrad Platzer, Rami Abou Jamra, Silke Redler, Clément Prouteau, Alban Ziegler, Hye-Won Shin","doi":"10.1080/10985549.2024.2391829","DOIUrl":"10.1080/10985549.2024.2391829","url":null,"abstract":"<p><p>P4-ATPases comprise a family of lipid flippases that translocate lipids from the exoplasmic (or luminal) to the cytoplasmic leaflet of biological membranes. Of the 14 known human P4-ATPases, ATP8B2 is a phosphatidylcholine flippase at the plasma membrane, but its physiological function is not well understood. Although ATP8B2 could interact with both CDC50A and CDC50B, it required only the CDC50A interaction for its exit from the endoplasmic reticulum and subsequent transport to the plasma membrane. Three de novo monoallelic missense variations of ATP8B2 were found in patients with intellectual disability. None of these variations affected the interaction of ATP8B2 with CDC50A or its localization to the plasma membrane. However, variations of either of two amino acid residues, which are conserved in all P4-ATPases, significantly reduced the phosphatidylcholine flippase activity of ATP8B2. Furthermore, mutations in the corresponding residues of ATP8B1 and ATP11C were found to decrease their flippase activities toward phosphatidylcholine and phosphatidylserine, respectively. These results indicate that the conserved amino acid residues are crucial for the enzymatic activities of the P4-ATPases.</p>","PeriodicalId":18658,"journal":{"name":"Molecular and Cellular Biology","volume":" ","pages":"473-488"},"PeriodicalIF":3.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11529410/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142109409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Control of Intestinal Stemness and Cell Lineage by Histone Variant H2A.Z Isoforms. 组蛋白变体 H2A.Z 同工酶对肠道干性和细胞系的控制
IF 3.2 2区 生物学
Molecular and Cellular Biology Pub Date : 2024-01-01 Epub Date: 2024-08-18 DOI: 10.1080/10985549.2024.2387720
Jérémie Rispal, Clémence Rives, Virginie Jouffret, Caroline Leoni, Louise Dubois, Martine Chevillard-Briet, Didier Trouche, Fabrice Escaffit
{"title":"Control of Intestinal Stemness and Cell Lineage by Histone Variant H2A.Z Isoforms.","authors":"Jérémie Rispal, Clémence Rives, Virginie Jouffret, Caroline Leoni, Louise Dubois, Martine Chevillard-Briet, Didier Trouche, Fabrice Escaffit","doi":"10.1080/10985549.2024.2387720","DOIUrl":"10.1080/10985549.2024.2387720","url":null,"abstract":"<p><p>The histone variant H2A.Z plays important functions in the regulation of gene expression. In mammals, it is encoded by two genes, giving rise to two highly related isoforms named H2A.Z.1 and H2A.Z.2, which can have similar or antagonistic functions depending on the promoter. Knowledge of the physiopathological consequences of such functions emerges, but how the balance between these isoforms regulates tissue homeostasis is not fully understood. Here, we investigated the relative role of H2A.Z isoforms in intestinal epithelial homeostasis. Through genome-wide analysis of H2A.Z genomic localization in differentiating Caco-2 cells, we uncovered an enrichment of H2A.Z isoforms on the bodies of genes which are induced during enterocyte differentiation, stressing the potential importance of H2A.Z isoforms dynamics in this process. Through a combination of in vitro and in vivo experiments, we further demonstrated the two isoforms cooperate for stem and progenitor cells proliferation, as well as for secretory lineage differentiation. However, we found that they antagonistically regulate enterocyte differentiation, with H2A.Z.1 preventing terminal differentiation and H2A.Z.2 favoring it. Altogether, these data indicate that H2A.Z isoforms are critical regulators of intestine homeostasis and may provide a paradigm of how the balance between two isoforms of the same chromatin structural protein can control physiopathological processes.</p>","PeriodicalId":18658,"journal":{"name":"Molecular and Cellular Biology","volume":" ","pages":"455-472"},"PeriodicalIF":3.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11529411/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142000367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Ribosome Assembly Factor LSG1 Interacts with Vesicle-Associated Membrane Protein-Associated Proteins (VAPs). 核糖体组装因子 LSG1 与囊泡相关膜蛋白相关蛋白(VAPs)相互作用
IF 3.2 2区 生物学
Molecular and Cellular Biology Pub Date : 2024-01-01 Epub Date: 2024-08-12 DOI: 10.1080/10985549.2024.2384600
Putri Sutjita, Sharmishtha Musalgaonkar, Jeffrey Recchia-Rife, Lisa Huang, Blerta Xhemalce, Arlen W Johnson
{"title":"The Ribosome Assembly Factor LSG1 Interacts with Vesicle-Associated Membrane Protein-Associated Proteins (VAPs).","authors":"Putri Sutjita, Sharmishtha Musalgaonkar, Jeffrey Recchia-Rife, Lisa Huang, Blerta Xhemalce, Arlen W Johnson","doi":"10.1080/10985549.2024.2384600","DOIUrl":"10.1080/10985549.2024.2384600","url":null,"abstract":"<p><p>LSG1 is a conserved GTPase involved in ribosome assembly. It is required for the eviction of the nuclear export adapter NMD3 from the pre-60S subunit in the cytoplasm. In human cells, LSG1 has also been shown to interact with vesicle-associated membrane protein-associated proteins (VAPs) that are found primarily on the endoplasmic reticulum. VAPs interact with a large host of proteins which contain FFAT motifs (two phenylalanines (FF) in an acidic tract) and are involved in many cellular functions including membrane traffic and regulation of lipid transport. Here, we show that human LSG1 binds to VAPs via a noncanonical FFAT-like motif. Deletion of this motif specifically disrupts the localization of LSG1 to the ER, without perturbing LSG1-dependent recycling of NMD3 <i>in cells</i> or modulation of LSG1 GTPase activity <i>in vitro</i>.</p>","PeriodicalId":18658,"journal":{"name":"Molecular and Cellular Biology","volume":" ","pages":"345-357"},"PeriodicalIF":3.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11376406/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141917113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Functional Roles of H3K4 Methylation in Transcriptional Regulation. H3K4 甲基化在转录调控中的功能作用
IF 3.2 2区 生物学
Molecular and Cellular Biology Pub Date : 2024-01-01 Epub Date: 2024-08-18 DOI: 10.1080/10985549.2024.2388254
Haoming Yu, Bluma J Lesch
{"title":"Functional Roles of H3K4 Methylation in Transcriptional Regulation.","authors":"Haoming Yu, Bluma J Lesch","doi":"10.1080/10985549.2024.2388254","DOIUrl":"10.1080/10985549.2024.2388254","url":null,"abstract":"<p><p>Histone 3 lysine 4 methylation (H3K4me) is a highly evolutionary conserved chromatin modification associated with active transcription, and its three methylation states-mono, di, and trimethylation-mark distinct regulatory elements. However, whether H3K4me plays functional roles in transcriptional regulation or is merely a by-product of histone methyltransferases recruited to actively transcribed loci is still under debate. Here, we outline the studies that have addressed this question in yeast, <i>Drosophila</i>, and mammalian systems. We review evidence from histone residue mutation, histone modifier manipulation, and epigenetic editing, focusing on the relative roles of H3K4me1 and H3K4me3. We conclude that H3K4me1 and H3K4me3 may have convergent functions in establishing open chromatin and promoting transcriptional activation during cell differentiation.</p>","PeriodicalId":18658,"journal":{"name":"Molecular and Cellular Biology","volume":" ","pages":"505-515"},"PeriodicalIF":3.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11529435/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142000368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reduced Protein Import via TIM23 SORT Drives Disease Pathology in TIMM50-Associated Mitochondrial Disease. TIMM50 相关线粒体疾病中,通过 TIM23 SORT 的蛋白质导入减少导致了疾病病理变化。
IF 3.2 2区 生物学
Molecular and Cellular Biology Pub Date : 2024-01-01 Epub Date: 2024-06-03 DOI: 10.1080/10985549.2024.2353652
Jordan J Crameri, Catherine S Palmer, Tegan Stait, Thomas D Jackson, Matthew Lynch, Adriane Sinclair, Leah E Frajman, Alison G Compton, David Coman, David R Thorburn, Ann E Frazier, Diana Stojanovski
{"title":"Reduced Protein Import via TIM23 SORT Drives Disease Pathology in TIMM50-Associated Mitochondrial Disease.","authors":"Jordan J Crameri, Catherine S Palmer, Tegan Stait, Thomas D Jackson, Matthew Lynch, Adriane Sinclair, Leah E Frajman, Alison G Compton, David Coman, David R Thorburn, Ann E Frazier, Diana Stojanovski","doi":"10.1080/10985549.2024.2353652","DOIUrl":"10.1080/10985549.2024.2353652","url":null,"abstract":"<p><p>TIMM50 is a core subunit of the TIM23 complex, the mitochondrial inner membrane translocase responsible for the import of pre-sequence-containing precursors into the mitochondrial matrix and inner membrane. Here we describe a mitochondrial disease patient who is homozygous for a novel variant in <i>TIMM50</i> and establish the first proteomic map of mitochondrial disease associated with TIMM50 dysfunction. We demonstrate that TIMM50 pathogenic variants reduce the levels and activity of endogenous TIM23 complex, which significantly impacts the mitochondrial proteome, resulting in a combined oxidative phosphorylation (OXPHOS) defect and changes to mitochondrial ultrastructure. Using proteomic data sets from TIMM50 patient fibroblasts and a TIMM50 HEK293 cell model of disease, we reveal that laterally released substrates imported via the TIM23<sup>SORT</sup> complex pathway are most sensitive to loss of TIMM50. Proteins involved in OXPHOS and mitochondrial ultrastructure are enriched in the TIM23<sup>SORT</sup> substrate pool, providing a biochemical mechanism for the specific defects in TIMM50-associated mitochondrial disease patients. These results highlight the power of using proteomics to elucidate molecular mechanisms of disease and uncovering novel features of fundamental biology, with the implication that human TIMM50 may have a more pronounced role in lateral insertion than previously understood.</p>","PeriodicalId":18658,"journal":{"name":"Molecular and Cellular Biology","volume":" ","pages":"226-244"},"PeriodicalIF":3.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11204040/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141200293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Expression of Interferon Epsilon in Mucosal Epithelium is Regulated by Elf3. 粘膜上皮细胞中干扰素 Epsilon 的表达受 Elf3 的调控
IF 3.2 2区 生物学
Molecular and Cellular Biology Pub Date : 2024-01-01 Epub Date: 2024-07-08 DOI: 10.1080/10985549.2024.2366207
Ka Yee Fung, Eveline D de Geus, Le Ying, Helen Cumming, Nollaig Bourke, Samuel C Foster, Paul J Hertzog
{"title":"Expression of Interferon Epsilon in Mucosal Epithelium is Regulated by Elf3.","authors":"Ka Yee Fung, Eveline D de Geus, Le Ying, Helen Cumming, Nollaig Bourke, Samuel C Foster, Paul J Hertzog","doi":"10.1080/10985549.2024.2366207","DOIUrl":"10.1080/10985549.2024.2366207","url":null,"abstract":"<p><p>Interferon epsilon (IFNε) is a unique type I interferon (IFN) that shows distinct constitutive expression in reproductive tract epithelium. Understanding how IFNε expression is regulated is critical for the mechanism of action in protecting the mucosa from infection. Combined computational and experimental investigation of the promoter of IFNε predicted transcription factor binding sites for the ETS family of transcription factors. We demonstrate here that <i>Ifnε</i> is regulated by Elf3, an epithelial restricted member of the ETS family. It is co-expressed with IFNε at the epithelium of uterus, lung and intestine, and we focused on regulation of IFNε expression in the uterus. Promoter reporter studies demonstrated that Elf3 was a strong driver of <i>Ifnε</i> expression; knockdown of Elf3 reduced expression levels of IFNε; Elf3 regulated <i>Ifnε</i> expression and chromatin immunoprecipitation (ChIP) confirmed the direct binding of Elf3 to the IFNε promoter. These data show that Elf3 is important in regulating protective mucosal immunity by driving constitutive expression of IFNε to protect mucosal tissues from infection in at least three organ systems.</p>","PeriodicalId":18658,"journal":{"name":"Molecular and Cellular Biology","volume":" ","pages":"334-343"},"PeriodicalIF":3.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11296529/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141555189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
FoxP1 Represses MEF2A in Striated Muscle. FoxP1 抑制横纹肌中的 MEF2A
IF 3.2 2区 生物学
Molecular and Cellular Biology Pub Date : 2024-01-01 Epub Date: 2024-03-14 DOI: 10.1080/10985549.2024.2323959
Sydney Steiman, Tetsuaki Miyake, John C McDermott
{"title":"FoxP1 Represses MEF2A in Striated Muscle.","authors":"Sydney Steiman, Tetsuaki Miyake, John C McDermott","doi":"10.1080/10985549.2024.2323959","DOIUrl":"10.1080/10985549.2024.2323959","url":null,"abstract":"<p><p>Myocyte enhancer factor 2 (MEF2) proteins are involved in multiple developmental, physiological, and pathological processes in vertebrates. Protein-protein interactions underlie the plethora of biological processes impacted by MEF2A, necessitating a detailed characterization of the MEF2A interactome. A nanobody based affinity-purification/mass spectrometry strategy was employed to achieve this goal. Specifically, the MEF2A protein complexes were captured from myogenic lysates using a GFP-tagged MEF2A protein immobilized with a GBP-nanobody followed by LC-MS/MS proteomic analysis to identify MEF2A interactors. After bioinformatic analysis, we further characterized the interaction of MEF2A with a transcriptional repressor, FOXP1. FOXP1 coprecipitated with MEF2A in proliferating myogenic cells which diminished upon differentiation (myotube formation). Ectopic expression of FOXP1 inhibited MEF2A driven myogenic reporter genes (derived from the <i>creatine kinase muscle</i> and <i>myogenin</i> genes) and delayed induction of endogenous myogenin during differentiation. Conversely, FOXP1 depletion enhanced MEF2A <i>trans</i>activation properties and myogenin expression. The FoxP1:MEF2A interaction is also preserved in cardiomyocytes and FoxP1 depletion enhanced cardiomyocyte hypertrophy. FOXP1 prevented MEF2A phosphorylation and activation by the p38MAPK pathway. Overall, these data implicate FOXP1 in restricting MEF2A function in order to avoid premature differentiation in myogenic progenitors and also to possibly prevent re-activation of embryonic gene expression in cardiomyocyte hypertrophy.</p>","PeriodicalId":18658,"journal":{"name":"Molecular and Cellular Biology","volume":" ","pages":"57-71"},"PeriodicalIF":3.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10950271/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140120080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ANP32e Binds Histone H2A.Z in a Cell Cycle-Dependent Manner and Regulates Its Protein Stability in the Cytoplasm. ANP32e 以细胞周期依赖性方式结合组蛋白 H2A.Z 并调节其在细胞质中的蛋白稳定性
IF 3.2 2区 生物学
Molecular and Cellular Biology Pub Date : 2024-01-01 Epub Date: 2024-03-14 DOI: 10.1080/10985549.2024.2319731
Yasmin Dijkwel, Gene Hart-Smith, Sebastian Kurscheid, David J Tremethick
{"title":"ANP32e Binds Histone H2A.Z in a Cell Cycle-Dependent Manner and Regulates Its Protein Stability in the Cytoplasm.","authors":"Yasmin Dijkwel, Gene Hart-Smith, Sebastian Kurscheid, David J Tremethick","doi":"10.1080/10985549.2024.2319731","DOIUrl":"10.1080/10985549.2024.2319731","url":null,"abstract":"<p><p>ANP32e, a chaperone of H2A.Z, is receiving increasing attention because of its association with cancer growth and progression. An unanswered question is whether ANP32e regulates H2A.Z dynamics during the cell cycle; this could have clear implications for the proliferation of cancer cells. We confirmed that ANP32e regulates the growth of human U2OS cancer cells and preferentially interacts with H2A.Z during the G1 phase of the cell cycle. Unexpectedly, ANP32e does not mediate the removal of H2A.Z from chromatin, is not a stable component of the p400 remodeling complex and is not strongly associated with chromatin. Instead, most ANP32e is in the cytoplasm. Here, ANP32e preferentially interacts with H2A.Z in the G1 phase in response to an increase in H2A.Z protein abundance and regulates its protein stability. This G1-specific interaction was also observed in the nucleoplasm but was unrelated to any change in H2A.Z abundance. These results challenge the idea that ANP32e regulates the abundance of H2A.Z in chromatin as part of a chromatin remodeling complex. We propose that ANP32e is a molecular chaperone that maintains the soluble pool of H2A.Z by regulating its protein stability and acting as a buffer in response to cell cycle-dependent changes in H2A.Z abundance.</p>","PeriodicalId":18658,"journal":{"name":"Molecular and Cellular Biology","volume":" ","pages":"72-85"},"PeriodicalIF":3.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10950284/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140120079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
FUS-Mediated Inhibition of Myogenesis Elicited by Suppressing TNNT1 Production. 通过抑制 TNNT1 的产生,FUS 介导的肌生成抑制作用。
IF 3.2 2区 生物学
Molecular and Cellular Biology Pub Date : 2024-01-01 Epub Date: 2024-08-12 DOI: 10.1080/10985549.2024.2383296
Eunbyul Ji, Poonam R Pandey, Jennifer L Martindale, Xiaoling Yang, Jen-Hao Yang, Dimitrios Tsitsipatis, Chang Hoon Shin, Yulan Piao, Jinshui Fan, Krystyna Mazan-Mamczarz, Nirad Banskota, Supriyo De, Myriam Gorospe
{"title":"FUS-Mediated Inhibition of Myogenesis Elicited by Suppressing TNNT1 Production.","authors":"Eunbyul Ji, Poonam R Pandey, Jennifer L Martindale, Xiaoling Yang, Jen-Hao Yang, Dimitrios Tsitsipatis, Chang Hoon Shin, Yulan Piao, Jinshui Fan, Krystyna Mazan-Mamczarz, Nirad Banskota, Supriyo De, Myriam Gorospe","doi":"10.1080/10985549.2024.2383296","DOIUrl":"10.1080/10985549.2024.2383296","url":null,"abstract":"<p><p>Myogenesis is a highly orchestrated process whereby muscle precursor cells, myoblasts, develop into muscle fibers to form skeletal muscle during embryogenesis and regenerate adult muscle. Here, we studied the RNA-binding protein FUS (fused in sarcoma), which has been implicated in muscular and neuromuscular pathologies but is poorly characterized in myogenesis. Given that FUS levels declined in human and mouse models of skeletal myogenesis, and that silencing FUS enhanced myogenesis, we hypothesized that FUS might be a repressor of myogenic differentiation. Interestingly, overexpression of FUS delayed myogenesis, accompanied by slower production of muscle differentiation markers. To identify the mechanisms through which FUS inhibits myogenesis, we uncovered RNA targets of FUS by ribonucleoprotein immunoprecipitation (RIP) followed by RNA-sequencing (RNA-seq) analysis. Stringent selection of the bound transcripts uncovered <i>Tnnt1</i> mRNA, encoding troponin T1 (TNNT1), as a major effector of FUS influence on myogenesis. We found that in myoblasts, FUS retained <i>Tnnt1</i> mRNA in the nucleus, preventing TNNT1 expression; however, reduction of FUS during myogenesis or by silencing FUS released <i>Tnnt1</i> mRNA for export to the cytoplasm, enabling TNNT1 translation and promoting myogenesis. We propose that FUS inhibits myogenesis by suppressing TNNT1 expression through a mechanism of nuclear <i>Tnnt1</i> mRNA retention.</p>","PeriodicalId":18658,"journal":{"name":"Molecular and Cellular Biology","volume":" ","pages":"391-409"},"PeriodicalIF":3.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11376412/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141917111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Expression of Smyd1b_tv1 by Alternative Splicing in Cardiac Muscle is Critical for Sarcomere Organization in Cardiomyocytes and Heart Function. 心肌中 Smyd1b_tv1 的替代剪接表达对心肌细胞中的肌节组织和心脏功能至关重要。
IF 3.2 2区 生物学
Molecular and Cellular Biology Pub Date : 2024-01-01 Epub Date: 2024-09-25 DOI: 10.1080/10985549.2024.2402660
Rui Xu, Siping Li, Chien-Ju Chien, Yongwang Zhong, Huanhuan Xiao, Shengyun Fang, Shaojun Du
{"title":"Expression of Smyd1b_tv1 by Alternative Splicing in Cardiac Muscle is Critical for Sarcomere Organization in Cardiomyocytes and Heart Function.","authors":"Rui Xu, Siping Li, Chien-Ju Chien, Yongwang Zhong, Huanhuan Xiao, Shengyun Fang, Shaojun Du","doi":"10.1080/10985549.2024.2402660","DOIUrl":"10.1080/10985549.2024.2402660","url":null,"abstract":"<p><p>Smyd1, a member of the Smyd lysine methyltransferase family, plays an important role in myofibrillogenesis of skeletal and cardiac muscles. Loss of Smyd1b (a Smyd1 ortholog) function in zebrafish results in embryonic death from heart malfunction. <i>smyd1b</i> encodes two isoforms, Smyd1b_tv1 and Smyd1b_tv2, differing by 13 amino acids due to alternative splicing. While <i>smyd1</i> alternative splicing is evolutionarily conserved, the isoform-specific expression and function of Smyd1b_tv1 and Smyd1b_tv2 remained unknown. Here we analyzed their expression and function in skeletal and cardiac muscles. Our analysis revealed expression of <i>smyd1b_tv1</i> predominately in cardiac and <i>smyd1b_tv2</i> in skeletal muscles. Using zebrafish models expressing only one isoform, we demonstrated that Smyd1b_tv1 is essential for cardiomyocyte differentiation and fish viability, whereas Smyd1b_tv2 is dispensable for heart development and fish survival. Cellular and biochemical analyses revealed that Smyd1b_tv1 differs from Smyd1b_tv2 in protein localization and binding with myosin chaperones. While Smyd1b_tv2 diffused in the cytosol of muscle cells, Smyd1b_tv1 was localized to M-lines and essential for sarcomere organization in cardiomyocytes. Co-IP analysis revealed a stronger binding of Smyd1b_tv1 with chaperones and cochaperones compared with Smyd1b_tv2. Collectively, these findings highlight the nonequivalence of Smyd1b isoforms in cardiomyocyte differentiation, emphasizing the critical role of Smyd1b_tv1 in cardiac function.</p>","PeriodicalId":18658,"journal":{"name":"Molecular and Cellular Biology","volume":" ","pages":"543-561"},"PeriodicalIF":3.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11583600/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142350048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信