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Mössner R, Wilsmann-Theis D, Oji V, Gkogkolou P, Löhr S, Schulz P, Körber A, Prinz JC, Renner R, Schäkel K, Vogelsang L, Peters KP, Philipp S, Reich K, Ständer H, Jacobi A, Weyergraf A, Kingo K, Kõks S, Gerdes S, Steinz K, Schill T, Griewank KG, Müller M, Frey S, Ebertsch L, Uebe S, Sticherling M, Sticht H, Hüffmeier U. The genetic basis for most patients with pustular skin disease remains elusive. Br J Dermatol 2018; 178:740-748. [PMID: 28887889 DOI: 10.1111/bjd.15867] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/27/2017] [Indexed: 12/27/2022]
Abstract
BACKGROUND Rare variants in the genes IL36RN, CARD14 and AP1S3 have been identified to cause or contribute to pustular skin diseases, primarily generalized pustular psoriasis (GPP). OBJECTIVES To better understand the disease relevance of these genes, we screened our cohorts of patients with pustular skin diseases [primarily GPP and palmoplantar pustular psoriasis (PPP)] for coding changes in these three genes. Carriers of single heterozygous IL36RN mutations were screened for a second mutation in IL36RN. METHODS Coding exons of IL36RN, CARD14 and AP1S3 were sequenced in 67 patients - 61 with GPP, two with acute generalized exanthematous pustulosis and four with acrodermatitis continua of Hallopeau. We screened IL36RN and AP1S3 for intragenic copy-number variants and 258 patients with PPP for coding changes in AP1S3. Eleven heterozygous IL36RN mutations carriers were analysed for a second noncoding IL36RN mutation. Genotype-phenotype correlations in carriers/noncarriers of IL36RN mutations were assessed within the GPP cohort. RESULTS The majority of patients (GPP, 64%) did not carry rare variants in any of the three genes. Biallelic and monoallelic IL36RN mutations were identified in 15 and five patients with GPP, respectively. Noncoding rare IL36RN variants were not identified in heterozygous carriers. The only significant genotype-phenotype correlation observed for IL36RN mutation carriers was early age at disease onset. Additional rare CARD14 or AP1S3 variants were identified in 15% of IL36RN mutation carriers. CONCLUSIONS The identification of IL36RN mutation carriers harbouring additional rare variants in CARD14 or AP1S3 indicates a more complex mode of inheritance of pustular psoriasis. Our results suggest that, in heterozygous IL36RN mutation carriers, there are additional disease-causing genetic factors outside IL36RN.
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Affiliation(s)
- R Mössner
- Department of Dermatology, Georg-August-University Göttingen, Göttingen, Germany
| | - D Wilsmann-Theis
- Department of Dermatology and Allergy, University Bonn, Bonn, Germany
| | - V Oji
- Department of Dermatology, University Münster, Münster, Germany
| | - P Gkogkolou
- Department of Dermatology, University Münster, Münster, Germany
| | - S Löhr
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - P Schulz
- Department of Dermatology, Fachklinik Bad Bentheim, Bad Bentheim, Germany
| | - A Körber
- Department of Dermatology, University of Essen, Essen, Germany
| | - J C Prinz
- Department of Dermatology and Allergology, Ludwig-Maximilian University Munich, Munich, Germany
| | - R Renner
- Department of Dermatology, University Hospital Erlangen, Erlangen, Germany
| | - K Schäkel
- Department of Dermatology, University Hospital Heidelberg, Heidelberg, Germany
| | - L Vogelsang
- Department of Dermatology, University Hospital Heidelberg, Heidelberg, Germany
| | - K-P Peters
- Department of Dermatology and Allergology, Hospital Bayreuth, Bayreuth, Germany
| | - S Philipp
- Department of Dermatology and Allergy, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - K Reich
- Dermatologikum Hamburg, Hamburg, Germany
| | - H Ständer
- Department of Dermatology, Klinikum Dortmund, Dortmund, Germany
| | - A Jacobi
- Institute for Health Services Research in Dermatology and Nursing, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - A Weyergraf
- Department of Dermatology, Fachklinik Bad Bentheim, Bad Bentheim, Germany
| | - K Kingo
- Department of Dermatology, Dermatology Clinic, University of Tartu, Tartu, Estonia
| | - S Kõks
- Department of Pathophysiology, University of Tartu, Tartu, Estonia
| | - S Gerdes
- Department of Dermatology, University of Kiel, Kiel, Germany
| | - K Steinz
- Department of Dermatology, University of Kiel, Kiel, Germany
| | - T Schill
- Department of Dermatology and Allergy, University Bonn, Bonn, Germany
| | - K G Griewank
- Department of Dermatology, University of Essen, Essen, Germany
| | - M Müller
- Institute of Occcupational, Social and Environmental Medicine, Georg-August-University Göttingen, Göttingen, Germany
| | - S Frey
- Department of Internal Medicine 3 - Rheumatology and Immunology, Universitätsklinikum Erlangen, Erlangen, Germany
| | - L Ebertsch
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - S Uebe
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - M Sticherling
- Department of Dermatology, University Hospital Erlangen, Erlangen, Germany
| | - H Sticht
- Bioinformatics, Institute of Biochemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - U Hüffmeier
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
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Peter D, Weber R, Köne C, Chung MY, Ebertsch L, Truffault V, Weichenrieder O, Igreja C, Izaurralde E. Mextli proteins use both canonical bipartite and novel tripartite binding modes to form eIF4E complexes that display differential sensitivity to 4E-BP regulation. Genes Dev 2015; 29:1835-49. [PMID: 26294658 PMCID: PMC4573856 DOI: 10.1101/gad.269068.115] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 08/07/2015] [Indexed: 12/20/2022]
Abstract
Peter et al. present the crystal structures of the eIF4E-binding regions of the Drosophila melanogaster (Dm) and Caenorhabditis elegans (Ce) Mxt proteins in complex with eIF4E in the cap-bound and cap-free states. The structures reveal unexpected diversity in the binding modes of 4E-BPs, resulting in eIF4E complexes that display differential sensitivity to 4E-BP regulation. The eIF4E-binding proteins (4E-BPs) are a diverse class of translation regulators that share a canonical eIF4E-binding motif (4E-BM) with eIF4G. Consequently, they compete with eIF4G for binding to eIF4E, thereby inhibiting translation initiation. Mextli (Mxt) is an unusual 4E-BP that promotes translation by also interacting with eIF3. Here we present the crystal structures of the eIF4E-binding regions of the Drosophila melanogaster (Dm) and Caenorhabditis elegans (Ce) Mxt proteins in complex with eIF4E in the cap-bound and cap-free states. The structures reveal unexpected evolutionary plasticity in the eIF4E-binding mode, with a classical bipartite interface for Ce Mxt and a novel tripartite interface for Dm Mxt. Both interfaces comprise a canonical helix and a noncanonical helix that engage the dorsal and lateral surfaces of eIF4E, respectively. Remarkably, Dm Mxt contains a C-terminal auxiliary helix that lies anti-parallel to the canonical helix on the eIF4E dorsal surface. In contrast to the eIF4G and Ce Mxt complexes, the Dm eIF4E–Mxt complexes are resistant to competition by bipartite 4E-BPs, suggesting that Dm Mxt can bind eIF4E when eIF4G binding is inhibited. Our results uncovered unexpected diversity in the binding modes of 4E-BPs, resulting in eIF4E complexes that display differential sensitivity to 4E-BP regulation.
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Affiliation(s)
- Daniel Peter
- Department of Biochemistry, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany
| | - Ramona Weber
- Department of Biochemistry, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany
| | - Carolin Köne
- Department of Biochemistry, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany
| | - Min-Yi Chung
- Department of Biochemistry, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany
| | - Linda Ebertsch
- Department of Biochemistry, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany
| | - Vincent Truffault
- Department of Biochemistry, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany
| | - Oliver Weichenrieder
- Department of Biochemistry, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany
| | - Cátia Igreja
- Department of Biochemistry, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany
| | - Elisa Izaurralde
- Department of Biochemistry, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany
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Peter D, Igreja C, Weber R, Wohlbold L, Weiler C, Ebertsch L, Weichenrieder O, Izaurralde E. Molecular architecture of 4E-BP translational inhibitors bound to eIF4E. Mol Cell 2015; 57:1074-1087. [PMID: 25702871 DOI: 10.1016/j.molcel.2015.01.017] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 12/22/2014] [Accepted: 01/07/2015] [Indexed: 01/09/2023]
Abstract
The eIF4E-binding proteins (4E-BPs) represent a diverse class of translation inhibitors that are often deregulated in cancer cells. 4E-BPs inhibit translation by competing with eIF4G for binding to eIF4E through an interface that consists of canonical and non-canonical eIF4E-binding motifs connected by a linker. The lack of high-resolution structures including the linkers, which contain phosphorylation sites, limits our understanding of how phosphorylation inhibits complex formation. Furthermore, the binding mechanism of the non-canonical motifs is poorly understood. Here, we present structures of human eIF4E bound to 4E-BP1 and fly eIF4E bound to Thor, 4E-T, and eIF4G. These structures reveal architectural elements that are unique to 4E-BPs and provide insight into the consequences of phosphorylation. Guided by these structures, we designed and crystallized a 4E-BP mimic that shows increased repressive activity. Our studies pave the way for the rational design of 4E-BP mimics as therapeutic tools to decrease translation during oncogenic transformation.
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Affiliation(s)
- Daniel Peter
- Department of Biochemistry, Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany
| | - Cátia Igreja
- Department of Biochemistry, Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany
| | - Ramona Weber
- Department of Biochemistry, Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany
| | - Lara Wohlbold
- Department of Biochemistry, Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany
| | - Catrin Weiler
- Department of Biochemistry, Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany
| | - Linda Ebertsch
- Department of Biochemistry, Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany
| | - Oliver Weichenrieder
- Department of Biochemistry, Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany.
| | - Elisa Izaurralde
- Department of Biochemistry, Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany.
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