Abstract:
:X-linked myotubular myopathy (XLMTM) is a congenital disorder caused by mutations of the myotubularin gene, MTM1. Myotubularin belongs to a large family of conserved lipid phosphatases that include both catalytically active and inactive myotubularin-related proteins (i.e., "MTMRs"). Biochemically, catalytically inactive MTMRs have been shown to form heteroligomers with active members within the myotubularin family through protein-protein interactions. However, the pathophysiological significance of catalytically inactive MTMRs remains unknown in muscle. By in vitro as well as in vivo studies, we have identified that catalytically inactive myotubularin-related protein 12 (MTMR12) binds to myotubularin in skeletal muscle. Knockdown of the mtmr12 gene in zebrafish resulted in skeletal muscle defects and impaired motor function. Analysis of mtmr12 morphant fish showed pathological changes with central nucleation, disorganized Triads, myofiber hypotrophy and whorled membrane structures similar to those seen in X-linked myotubular myopathy. Biochemical studies showed that deficiency of MTMR12 results in reduced levels of myotubularin protein in zebrafish and mammalian C2C12 cells. Loss of myotubularin also resulted in reduction of MTMR12 protein in C2C12 cells, mice and humans. Moreover, XLMTM mutations within the myotubularin interaction domain disrupted binding to MTMR12 in cell culture. Analysis of human XLMTM patient myotubes showed that mutations that disrupt the interaction between myotubularin and MTMR12 proteins result in reduction of both myotubularin and MTMR12. These studies strongly support the concept that interactions between myotubularin and MTMR12 are required for the stability of their functional protein complex in normal skeletal muscles. This work highlights an important physiological function of catalytically inactive phosphatases in the pathophysiology of myotubular myopathy and suggests a novel therapeutic approach through identification of drugs that could stabilize the myotubularin-MTMR12 complex and hence ameliorate this disorder.
journal_name
PLoS Genetjournal_title
PLoS geneticsauthors
Gupta VA,Hnia K,Smith LL,Gundry SR,McIntire JE,Shimazu J,Bass JR,Talbot EA,Amoasii L,Goldman NE,Laporte J,Beggs AHdoi
10.1371/journal.pgen.1003583subject
Has Abstractpub_date
2013-06-01 00:00:00pages
e1003583issue
6eissn
1553-7390issn
1553-7404pii
PGENETICS-D-12-03175journal_volume
9pub_type
杂志文章相关文献
PLoS Genetics文献大全abstract::During pancreatic development, transcription factor cascades gradually commit precursor populations to the different endocrine cell fate pathways. Although mutational analyses have defined the functions of many individual pancreatic transcription factors, the integrative transcription factor networks required to regul...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1003278
更新日期:2013-01-01 00:00:00
abstract::Understanding the molecular mechanisms of ultraviolet (UV) induced melanoma formation is becoming crucial with more reported cases each year. Expression of type II nuclear receptor Retinoid-X-Receptor α (RXRα) is lost during melanoma progression in humans. Here, we observed that in mice with melanocyte-specific ablati...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1004321
更新日期:2014-05-08 00:00:00
abstract::Detection and validation of the RNA degradation signals controlling transcriptome stability are essential steps for understanding how cells regulate gene expression. Here we present complete genomic and biochemical annotations of the signals required for RNA degradation by the dsRNA specific ribonuclease III (Rnt1p) a...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1005000
更新日期:2015-02-13 00:00:00
abstract::Although autism has a clear genetic component, the high genetic heterogeneity of the disorder has been a challenge for the identification of causative genes. We used homozygosity analysis to identify probands from nonconsanguineous families that showed evidence of distant shared ancestry, suggesting potentially recess...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1002635
更新日期:2012-01-01 00:00:00
abstract::Hematopoietic stem cells (HSCs) are rare quiescent cells that continuously replenish the cellular components of the peripheral blood. Observing that the ataxia-associated gene Ataxin-1-like (Atxn1L) was highly expressed in HSCs, we examined its role in HSC function through in vitro and in vivo assays. Mice lacking Atx...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1003359
更新日期:2013-03-01 00:00:00
abstract::The pentatricopeptide repeat (PPR) is a helical repeat motif found in an exceptionally large family of RNA-binding proteins that functions in mitochondrial and chloroplast gene expression. PPR proteins harbor between 2 and 30 repeats and typically bind single-stranded RNA in a sequence-specific fashion. However, the b...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1002910
更新日期:2012-01-01 00:00:00
abstract::The Eukaryotic RecA-like proteins Rad51 and Dmc1 cooperate during meiosis to promote recombination between homologous chromosomes by repairing programmed DNA double strand breaks (DSBs). Previous studies showed that Rad51 and Dmc1 form partially overlapping co-foci. Here we show these Rad51-Dmc1 co-foci are often arra...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1005653
更新日期:2015-12-31 00:00:00
abstract::The inability of native Saccharomyces cerevisiae to convert xylose from plant biomass into biofuels remains a major challenge for the production of renewable bioenergy. Despite extensive knowledge of the regulatory networks controlling carbon metabolism in yeast, little is known about how to reprogram S. cerevisiae to...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1006372
更新日期:2016-10-14 00:00:00
abstract::Complex traits are known to be influenced by a combination of environmental factors and rare and common genetic variants. However, detection of such multivariate associations can be compromised by low statistical power and confounding by population structure. Linear mixed effects models (LMM) can account for correlati...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1008766
更新日期:2020-05-04 00:00:00
abstract::Mating and gametogenesis are two essential components of animal reproduction. Gametogenesis must be modulated by the need for gametes, yet little is known of how mating, a process that utilizes gametes, may modulate the process of gametogenesis. Here, we report that mating stimulates female germline stem cell (GSC) pr...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1006123
更新日期:2016-06-16 00:00:00
abstract::Nonallelic homologous recombination (NAHR) between highly similar duplicated sequences generates chromosomal deletions, duplications and inversions, which can cause diverse genetic disorders. Little is known about interindividual variation in NAHR rates and the factors that influence this. We estimated the rate of del...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1004195
更新日期:2014-03-06 00:00:00
abstract::Phenotypic variation within an isogenic bacterial population is thought to ensure the survival of a subset of cells in adverse conditions. The opportunistic pathogen Pseudomonas aeruginosa variably expresses several phenotypes, including antibiotic resistance, biofilm formation, and the production of CupA fimbriae. He...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1000779
更新日期:2009-12-01 00:00:00
abstract::The differentiation of cells into distinct cell types, each of which is heritable for many generations, underlies many biological phenomena. White and opaque cells of the fungal pathogen Candida albicans are two such heritable cell types, each thought to be adapted to unique niches within their human host. To systemat...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1001070
更新日期:2010-08-19 00:00:00
abstract::High-throughput genetic screens are powerful methods to identify genes linked to a given phenotype. The catalytic null mutant of the Cas9 RNA-guided nuclease (dCas9) can be conveniently used to silence genes of interest in a method also known as CRISPRi. Here, we report a genome-wide CRISPR-dCas9 screen using a starti...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1007749
更新日期:2018-11-07 00:00:00
abstract::Meiotic recombination is essential for the repair of programmed double strand breaks (DSBs) to generate crossovers (COs) during meiosis. The efficient processing of meiotic recombination intermediates not only needs various resolvases but also requires proper meiotic chromosome structure. The Smc5/6 complex belongs to...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1005872
更新日期:2016-03-24 00:00:00
abstract::Salt stress is an important environmental factor that significantly limits crop productivity worldwide. Studies on responses of plants to salt stress in recent years have identified novel signaling pathways and have been at the forefront of plant stress biology and plant biology in general. Thus far, research on salt ...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1003755
更新日期:2013-08-01 00:00:00
abstract::The intra-S phase checkpoint kinase of metazoa and yeast, ATR/MEC1, protects chromosomes from DNA damage and replication stress by phosphorylating subunits of the replicative helicase, MCM2-7. Here we describe an unprecedented ATR-dependent pathway in Tetrahymena thermophila in which the essential pre-replicative comp...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1005405
更新日期:2015-07-28 00:00:00
abstract::NF-κB is a key transcription factor regulating the expression of inflammatory responsive genes. How NF-κB binds to naked DNA templates is well documented, but how it interacts with chromatin is far from being clear. Here we used a combination of UV laser footprinting, hydroxyl footprinting and electrophoretic mobility...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1003830
更新日期:2013-01-01 00:00:00
abstract::Replication Protein A (RPA) is a heterotrimeric, single-stranded DNA (ssDNA)-binding complex required for DNA replication and repair, homologous recombination, DNA damage checkpoint signaling, and telomere maintenance. Whilst the larger RPA subunits, Rpa1 and Rpa2, have essential interactions with ssDNA, the molecular...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1001138
更新日期:2010-09-23 00:00:00
abstract::We report association mapping of a locus on bovine chromosome 3 that underlies a Mendelian form of stunted growth in Belgian Blue Cattle (BBC). By resequencing positional candidates, we identify the causative c124-2A>G splice variant in intron 1 of the RNF11 gene, for which all affected animals are homozygous. We make...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1002581
更新日期:2012-01-01 00:00:00
abstract::Maintaining levels of calcium in the cytosol is important for many cellular events, including cell migration, where localized regions of high calcium are required to regulate cytoskeletal dynamics, contractility, and adhesion. Studies show inositol-trisphosphate receptors (IP3R) and ryanodine receptors (RyR), which re...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1003506
更新日期:2013-05-01 00:00:00
abstract::The mammalian Y chromosome plays a critical role in spermatogenesis. However, the exact functions of each gene in the Y chromosome have not been completely elucidated, partly owing to difficulties in gene targeting analysis of the Y chromosome. Zfy was first proposed to be a sex determination factor, but its function ...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1006578
更新日期:2017-01-23 00:00:00
abstract::Mitochondrial translation defects can be due to mutations affecting mitochondrial- or nuclear-encoded components. The number of known nuclear genes involved in mitochondrial translation has significantly increased in the past years. RCC1L (WBSCR16), a putative GDP/GTP exchange factor, has recently been described to in...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1008923
更新日期:2020-07-31 00:00:00
abstract::Genome-wide association studies (GWAS) have successfully identified tens of thousands of genetic variants associated with various phenotypes, but together they explain only a fraction of heritability, suggesting many variants have yet to be discovered. Recently it has been recognized that incorporating functional info...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1008947
更新日期:2020-08-24 00:00:00
abstract::Considerable evidence now supports the idea that the moderate telomere lengthening produced by recombinational telomere elongation (RTE) in a Kluyveromyces lactis telomerase deletion mutant occurs through a roll-and-spread mechanism. However, it is unclear whether this mechanism can account for other forms of RTE that...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1003017
更新日期:2012-01-01 00:00:00
abstract::Deletion of tumor suppressor genes in stromal fibroblasts induces epithelial cancer development, suggesting an important role of stroma in epithelial homoeostasis. However, the underlying mechanisms remain to be elucidated. Here we report that deletion of the gene encoding TGFβ receptor 2 (Tgfbr2) in the stromal fibro...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1003251
更新日期:2013-01-01 00:00:00
abstract::Synthesis of ribosomal RNA by RNA polymerase I (RNA pol I) is an elemental biological process and is key for cellular homeostasis. In a forward genetic screen in C. elegans designed to identify DNA damage-response factors, we isolated a point mutation of RNA pol I, rpoa-2(op259), that leads to altered rRNA synthesis a...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1003943
更新日期:2013-11-01 00:00:00
abstract::Heterozygous mutations in the PRPF31 gene cause autosomal dominant retinitis pigmentosa (adRP), a hereditary disorder leading to progressive blindness. In some cases, such mutations display incomplete penetrance, implying that certain carriers develop retinal degeneration while others have no symptoms at all. Asymptom...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1003040
更新日期:2012-01-01 00:00:00
abstract::Populations in sub-Saharan Africa have historically been exposed to intense selection from chronic infection with falciparum malaria. Interestingly, populations with the highest malaria intensity can be identified by the increased occurrence of endemic Burkitt Lymphoma (eBL), a pediatric cancer that affects population...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1008027
更新日期:2019-03-08 00:00:00
abstract::Most genetic variants associated with disease occur within regulatory regions of the genome, underscoring the importance of defining the mechanisms underlying differences in regulation of gene expression between individuals. We discovered a pair of co-regulated, divergently oriented transcripts, AQY2 and ncFRE6, that ...
journal_title:PLoS genetics
pub_type: 杂志文章
doi:10.1371/journal.pgen.1005746
更新日期:2016-01-11 00:00:00