Готові списки джерел за темами / WDR11 complex

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Добірка наукової літератури з теми "WDR11 complex"

Автор: Grafiati

Опубліковано: 11 березня 2023

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Статті в журналах з теми "WDR11 complex"

LIU, Nan, and ChongLin YANG. "WDR91-WDR81 complex-dependent endolysosomal trafficking and neural development." SCIENTIA SINICA Vitae 49, no. 7 (July 1, 2019): 798–805. http://dx.doi.org/10.1360/ssv-2019-0100.

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Liu, Kai, Youli Jian, Xiaojuan Sun, Chengkui Yang, Zhiyang Gao, Zhili Zhang, Xuezhao Liu, et al. "Negative regulation of phosphatidylinositol 3-phosphate levels in early-to-late endosome conversion." Journal of Cell Biology 212, no. 2 (January 18, 2016): 181–98. http://dx.doi.org/10.1083/jcb.201506081.

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Phosphatidylinositol 3-phosphate (PtdIns3P) plays a central role in endosome fusion, recycling, sorting, and early-to-late endosome conversion, but the mechanisms that determine how the correct endosomal PtdIns3P level is achieved remain largely elusive. Here we identify two new factors, SORF-1 and SORF-2, as essential PtdIns3P regulators in Caenorhabditis elegans. Loss of sorf-1 or sorf-2 leads to greatly elevated endosomal PtdIns3P, which drives excessive fusion of early endosomes. sorf-1 and sorf-2 function coordinately with Rab switching genes to inhibit synthesis of PtdIns3P, allowing its turnover for endosome conversion. SORF-1 and SORF-2 act in a complex with BEC-1/Beclin1, and their loss causes elevated activity of the phosphatidylinositol 3-kinase (PI3K) complex. In mammalian cells, inactivation of WDR91 and WDR81, the homologs of SORF-1 and SORF-2, induces Beclin1-dependent enlargement of PtdIns3P-enriched endosomes and defective degradation of epidermal growth factor receptor. WDR91 and WDR81 interact with Beclin1 and inhibit PI3K complex activity. These findings reveal a conserved mechanism that controls appropriate PtdIns3P levels in early-to-late endosome conversion.

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Brauner, Raja, Joelle Bignon-Topalovic, Anu Bashamboo, and Ken McElreavey. "Pituitary stalk interruption syndrome is characterized by genetic heterogeneity." PLOS ONE 15, no. 12 (December 3, 2020): e0242358. http://dx.doi.org/10.1371/journal.pone.0242358.

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Pituitary stalk interruption syndrome is a rare disorder characterized by an absent or ectopic posterior pituitary, interrupted pituitary stalk and anterior pituitary hypoplasia, as well as in some cases, a range of heterogeneous somatic anomalies. A genetic cause is identified in only around 5% of all cases. Here, we define the genetic variants associated with PSIS followed by the same pediatric endocrinologist. Exome sequencing was performed in 52 (33 boys and 19 girls), including 2 familial cases single center pediatric cases, among them associated 36 (69.2%) had associated symptoms or syndromes. We identified rare and novel variants in genes (37 families with 39 individuals) known to be involved in one or more of the following—midline development and/or pituitary development or function (BMP4, CDON, GLI2, GLI3, HESX1, KIAA0556, LHX9, NKX2-1, PROP1, PTCH1, SHH, TBX19, TGIF1), syndromic and non-syndromic forms of hypogonadotropic hypogonadism (CCDC141, CHD7, FANCA, FANCC, FANCD2, FANCE, FANCG, IL17RD, KISS1R, NSMF, PMM2, SEMA3E, WDR11), syndromic forms of short stature (FGFR3, NBAS, PRMT7, RAF1, SLX4, SMARCA2, SOX11), cerebellum atrophy with optic anomalies (DNMT1, NBAS), axonal migration (ROBO1, SLIT2), and agenesis of the corpus callosum (ARID1B, CC2D2A, CEP120, CSPP1, DHCR7, INPP5E, VPS13B, ZNF423). Pituitary stalk interruption syndrome is characterized by a complex genetic heterogeneity, that reflects a complex phenotypic heterogeneity. Seizures, intellectual disability, micropenis or cryptorchidism, seen at presentation are usually considered as secondary to the pituitary deficiencies. However, this study shows that they are due to specific gene mutations. PSIS should therefore be considered as part of the phenotypic spectrum of other known genetic syndromes rather than as specific clinical entity.

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Rapiteanu, Radu, Luther J. Davis, James C. Williamson, Richard T. Timms, J. Paul Luzio, and Paul J. Lehner. "A Genetic Screen Identifies a Critical Role for the WDR81‐WDR91 Complex in the Trafficking and Degradation of Tetherin." Traffic 17, no. 8 (May 25, 2016): 940–58. http://dx.doi.org/10.1111/tra.12409.

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Tang, Dan, Jingwen Sheng, Liangting Xu, Xiechao Zhan, Jiaming Liu, Hui Jiang, Xiaoling Shu, et al. "Cryo-EM structure of C9ORF72–SMCR8–WDR41 reveals the role as a GAP for Rab8a and Rab11a." Proceedings of the National Academy of Sciences 117, no. 18 (April 17, 2020): 9876–83. http://dx.doi.org/10.1073/pnas.2002110117.

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A massive intronic hexanucleotide repeat (GGGGCC) expansion in C9ORF72 is a genetic origin of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). Recently, C9ORF72, together with SMCR8 and WDR41, has been shown to regulate autophagy and function as Rab GEF. However, the precise function of C9ORF72 remains unclear. Here, we report the cryogenic electron microscopy (cryo-EM) structure of the human C9ORF72–SMCR8–WDR41 complex at a resolution of 3.2 Å. The structure reveals the dimeric assembly of a heterotrimer of C9ORF72–SMCR8–WDR41. Notably, the C-terminal tail of C9ORF72 and the DENN domain of SMCR8 play critical roles in the dimerization of the two protomers of the C9ORF72–SMCR8–WDR41 complex. In the protomer, C9ORF72 and WDR41 are joined by SMCR8 without direct interaction. WDR41 binds to the DENN domain of SMCR8 by the C-terminal helix. Interestingly, the prominent structural feature of C9ORF72–SMCR8 resembles that of the FLNC–FNIP2 complex, the GTPase activating protein (GAP) of RagC/D. Structural comparison and sequence alignment revealed that Arg147 of SMCR8 is conserved and corresponds to the arginine finger of FLCN, and biochemical analysis indicated that the Arg147 of SMCR8 is critical to the stimulatory effect of the C9ORF72–SMCR8 complex on Rab8a and Rab11a. Our study not only illustrates the basis of C9ORF72–SMCR8–WDR41 complex assembly but also reveals the GAP activity of the C9ORF72–SMCR8 complex.

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Talaia, Gabriel, Joseph Amick, and Shawn M. Ferguson. "Receptor-like role for PQLC2 amino acid transporter in the lysosomal sensing of cationic amino acids." Proceedings of the National Academy of Sciences 118, no. 8 (February 17, 2021): e2014941118. http://dx.doi.org/10.1073/pnas.2014941118.

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Анотація:

PQLC2, a lysosomal cationic amino acid transporter, also serves as a sensor that responds to scarcity of its substrates by recruiting a protein complex composed of C9orf72, SMCR8, and WDR41 to the surface of lysosomes. This protein complex controls multiple aspects of lysosome function. Although it is known that this response to changes in cationic amino acid availability depends on an interaction between PQLC2 and WDR41, the underlying mechanism for the regulated interaction is not known. In this study, we present evidence that the WDR41–PQLC2 interaction is mediated by a short peptide motif in a flexible loop that extends from the WDR41 β-propeller and inserts into a cavity presented by the inward-facing conformation of PQLC2. The data support a transceptor model wherein conformational changes in PQLC2 related to substrate transport regulate the availability of the WDR41-binding site on PQLC2 and mediate recruitment of the WDR41-SMCR8-C9orf72 complex to the surface of lysosomes.

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Hölzel, Michael, Michaela Rohrmoser, Martin Schlee, Thomas Grimm, Thomas Harasim, Anastassia Malamoussi, Anita Gruber-Eber, et al. "Mammalian WDR12 is a novel member of the Pes1–Bop1 complex and is required for ribosome biogenesis and cell proliferation." Journal of Cell Biology 170, no. 3 (July 25, 2005): 367–78. http://dx.doi.org/10.1083/jcb.200501141.

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Target genes of the protooncogene c-myc are implicated in cell cycle and growth control, yet the linkage of both is still unexplored. Here, we show that the products of the nucleolar target genes Pes1 and Bop1 form a stable complex with a novel member, WDR12 (PeBoW complex). Endogenous WDR12, a WD40 repeat protein, is crucial for processing of the 32S precursor ribosomal RNA (rRNA) and cell proliferation. Further, a conditionally expressed dominant-negative mutant of WDR12 also blocks rRNA processing and induces a reversible cell cycle arrest. Mutant WDR12 triggers accumulation of p53 in a p19ARF-independent manner in proliferating cells but not in quiescent cells. Interestingly, a potential homologous complex of Pes1–Bop1–WDR12 in yeast (Nop7p–Erb1p–Ytm1p) is involved in the control of ribosome biogenesis and S phase entry. In conclusion, the integrity of the PeBoW complex is required for ribosome biogenesis and cell proliferation in mammalian cells.

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Amick, Joseph, Arun Kumar Tharkeshwar, Catherine Amaya,, and Shawn M. Ferguson. "WDR41 supports lysosomal response to changes in amino acid availability." Molecular Biology of the Cell 29, no. 18 (September 2018): 2213–27. http://dx.doi.org/10.1091/mbc.e17-12-0703.

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C9orf72 mutations are a major cause of amyotrophic lateral sclerosis and frontotemporal dementia. The C9orf72 protein undergoes regulated recruitment to lysosomes and has been broadly implicated in control of lysosome homeostasis. However, although evidence strongly supports an important function for C9orf72 at lysosomes, little is known about the lysosome recruitment mechanism. In this study, we identify an essential role for WDR41, a prominent C9orf72 interacting protein, in C9orf72 lysosome recruitment. Analysis of human WDR41 knockout cells revealed that WDR41 is required for localization of the protein complex containing C9orf72 and SMCR8 to lysosomes. Such lysosome localization increases in response to amino acid starvation but is not dependent on either mTORC1 inhibition or autophagy induction. Furthermore, WDR41 itself exhibits a parallel pattern of regulated association with lysosomes. This WDR41-dependent recruitment of C9orf72 to lysosomes is critical for the ability of lysosomes to support mTORC1 signaling as constitutive targeting of C9orf72 to lysosomes relieves the requirement for WDR41 in mTORC1 activation. Collectively, this study reveals an essential role for WDR41 in supporting the regulated binding of C9orf72 to lysosomes and solidifies the requirement for a larger C9orf72 containing protein complex in coordinating lysosomal responses to changes in amino acid availability.

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Rohrmoser, Michaela, Michael Hölzel, Thomas Grimm, Anastassia Malamoussi, Thomas Harasim, Mathias Orban, Iris Pfisterer, Anita Gruber-Eber, Elisabeth Kremmer, and Dirk Eick. "Interdependence of Pes1, Bop1, and WDR12 Controls Nucleolar Localization and Assembly of the PeBoW Complex Required for Maturation of the 60S Ribosomal Subunit." Molecular and Cellular Biology 27, no. 10 (March 12, 2007): 3682–94. http://dx.doi.org/10.1128/mcb.00172-07.

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Анотація:

ABSTRACT The PeBoW complex is essential for cell proliferation and maturation of the large ribosomal subunit in mammalian cells. Here we examined the role of PeBoW-specific proteins Pes1, Bop1, and WDR12 in complex assembly and stability, nucleolar transport, and preribosome association. Recombinant expression of the three subunits is sufficient for complex formation. The stability of all three subunits strongly increases upon incorporation into the complex. Only overexpression of Bop1 inhibits cell proliferation and rRNA processing, and its negative effects could be rescued by coexpression of WDR12, but not Pes1. Elevated levels of Bop1 induce Bop1/WDR12 and Bop1/Pes1 subcomplexes. Knockdown of Bop1 abolishes the copurification of Pes1 with WDR12, demonstrating Bop1 as the integral component of the complex. Overexpressed Bop1 substitutes for endogenous Bop1 in PeBoW complex assembly, leading to the instability of endogenous Bop1. Finally, indirect immunofluorescence, cell fractionation, and sucrose gradient centrifugation experiments indicate that transport of Bop1 from the cytoplasm to the nucleolus is Pes1 dependent, while Pes1 can migrate to the nucleolus and bind to preribosomal particles independently of Bop1. We conclude that the assembly and integrity of the PeBoW complex are highly sensitive to changes in Bop1 protein levels.

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Kile, Benjamin T., Athanasia D. Panopoulos, Roslynn A. Stirzaker, Douglas F. Hacking, Lubna H. Tahtamouni, Tracy A. Willson, Lisa A. Mielke, et al. "Mutations in the cofilin partner Aip1/Wdr1 cause autoinflammatory disease and macrothrombocytopenia." Blood 110, no. 7 (October 1, 2007): 2371–80. http://dx.doi.org/10.1182/blood-2006-10-055087.

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Анотація:

A pivotal mediator of actin dynamics is the protein cofilin, which promotes filament severing and depolymerization, facilitating the breakdown of existing filaments, and the enhancement of filament growth from newly created barbed ends. It does so in concert with actin interacting protein 1 (Aip1), which serves to accelerate cofilin's activity. While progress has been made in understanding its biochemical functions, the physiologic processes the cofilin/Aip1 complex regulates, particularly in higher organisms, are yet to be determined. We have generated an allelic series for WD40 repeat protein 1 (Wdr1), the mammalian homolog of Aip1, and report that reductions in Wdr1 function produce a dramatic phenotype gradient. While severe loss of function at the Wdr1 locus causes embryonic lethality, macrothrombocytopenia and autoinflammatory disease develop in mice carrying hypomorphic alleles. Macrothrombocytopenia is the result of megakaryocyte maturation defects, which lead to a failure of normal platelet shedding. Autoinflammatory disease, which is bone marrow–derived yet nonlymphoid in origin, is characterized by a massive infiltration of neutrophils into inflammatory lesions. Cytoskeletal responses are impaired in Wdr1 mutant neutrophils. These studies establish an essential requirement for Wdr1 in megakaryocytes and neutrophils, indicating that cofilin-mediated actin dynamics are critically important to the development and function of both cell types.

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Більше джерел

Дисертації з теми "WDR11 complex"

Olaleye, Onireti Jacob. "Novel Roles of Cullin-RING Ligases in Cell Signalling and Implications in Health and Disease." Doctoral thesis, 2022. http://hdl.handle.net/11562/1070147.

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Cullin-RING ligases (CRLs) play fundamental functions in key physiological and pathological processes. To identify novel roles of CRLs in cell signalling and their implication in health and diseases, we performed two separate studies: In study 1, we analysed genomic databases to identify CRLs that are hypermutated in cancer. We found that the CRL substrate receptors FBXO24 and DCAF12L2 are hypermutated at critical domains that are necessary for the proper structure/function of the CRL1FBXO24 and CRL4DCAF12L2 complexes, respectively. We showed that the FBXO24(T65P) mutation within the F-box domain as found in cancer disrupts the CRL1FBXO24 complex by blocking the binding of FBXO24 to SKP1. Similarly, we found that DCAF12L2 is hypermutated in cancer at the amino acids sequence positions 334, 335, and 337 within the WD40 repeats that mediate substrate binding. Our affinity purification coupled with mass spectrometry analysis identified MEKK4 and the WDR11 complex as two independent substrates of CRL4DCAF12L2. Moreover, the DCAF12L2(P334L), (R335C), and (R335H) mutations block DCAF12L2 binding to MEKK4 and the WDR11 complex. We also showed that FAM91A1, a component of the WDR11 complex, is ubiquitylated by CRL4DCAF12L2 and proposed that the ubiquitylation of FAM91A1 might be critical in regulating the stability and function of the WDR11 complex. In study 2, we employed a proteomic approach to identify CRL3 complexes activated at the cellular membrane. Our mass spectrometry analysis identified CRL3KLHL12 as a ubiquitin ligase that mediates the ubiquitylation of Lunapark, an endoplasmic reticulum (ER) shaping protein. We show that Lunapark interacts with mechanistic target of rapamycin complex1 (mTORC1) and that the ubiquitylation of Lunapark regulates mTORC1 activation. In addition, we show that the inhibition of Lunapark ubiquitylation leads to neurodevelopmental defects.

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