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Alemu EA Sjøttem E Outzen H Larsen KB Holm T Bjørkøy G Johansen T 《Cellular and molecular life sciences : CMLS》2011,68(11):1953-1968
The protein kinase C (PKC) family of serine/threonine kinases consists of ten different isoforms grouped into three subfamilies,
denoted classical, novel and atypical PKCs (aPKCs). The aPKCs, PKCι/λ and PKCζ serve important roles during development and
in processes subverted in cancer such as cell and tissue polarity, cell proliferation, differentiation and apoptosis. In an
effort to identify novel interaction partners for aPKCs, we performed a yeast two-hybrid screen with the regulatory domain
of PKCι/λ as bait and identified the Krüppel-like factors family protein TIEG1 as a putative interaction partner for PKCι/λ.
We confirmed the interaction of both aPKCs with TIEG1 in vitro and in cells, and found that both aPKCs phosphorylate the DNA-binding
domain of TIEG1 on two critical residues. Interestingly, the aPKC-mediated phosphorylation of TIEG1 affected its DNA-binding
activity, subnuclear localization and transactivation potential. 相似文献
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Sulem P Gudbjartsson DF Walters GB Helgadottir HT Helgason A Gudjonsson SA Zanon C Besenbacher S Bjornsdottir G Magnusson OT Magnusson G Hjartarson E Saemundsdottir J Gylfason A Jonasdottir A Holm H Karason A Rafnar T Stefansson H Andreassen OA Pedersen JH Pack AI de Visser MC Kiemeney LA Geirsson AJ Eyjolfsson GI Olafsson I Kong A Masson G Jonsson H Thorsteinsdottir U Jonsdottir I Stefansson K 《Nature genetics》2011,43(11):1127-1130
We tested 16 million SNPs, identified through whole-genome sequencing of 457 Icelanders, for association with gout and serum uric acid levels. Genotypes were imputed into 41,675 chip-genotyped Icelanders and their relatives, for effective sample sizes of 968 individuals with gout and 15,506 individuals for whom serum uric acid measurements were available. We identified a low-frequency missense variant (c.1580C>G) in ALDH16A1 associated with gout (OR = 3.12, P = 1.5 × 10(-16), at-risk allele frequency = 0.019) and serum uric acid levels (effect = 0.36 s.d., P = 4.5 × 10(-21)). We confirmed the association with gout by performing Sanger sequencing on 6,017 Icelanders. The association with gout was stronger in males relative to females. We also found a second variant on chromosome 1 associated with gout (OR = 1.92, P = 0.046, at-risk allele frequency = 0.986) and serum uric acid levels (effect = 0.48 s.d., P = 4.5 × 10(-16)). This variant is close to a common variant previously associated with serum uric acid levels. This work illustrates how whole-genome sequencing data allow the detection of associations between low-frequency variants and complex traits. 相似文献
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T. Ruhland P. Holm K Andersen 《复旦学报(自然科学版)》2005,44(5):793-793
During the latest decade, the intensive investigation into the solid-phase synthesis of small organic molecules, as well as the use of polymer-supported reagents and catalysts for solution-phase organic synthesis has lead to paradigm shifts in many areas of chemistry. This has particularly been the case within the fields of biological and medicinal chemistry where the parallel synthesis of discrete molecules (in series or larger libraries), either by manual or automated methods, has been implemented as a key technology/methodology in the preparation of compounds for biological evaluation. 相似文献
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A syndrome of altered cardiovascular, craniofacial, neurocognitive and skeletal development caused by mutations in TGFBR1 or TGFBR2 总被引:18,自引:0,他引:18
Loeys BL Chen J Neptune ER Judge DP Podowski M Holm T Meyers J Leitch CC Katsanis N Sharifi N Xu FL Myers LA Spevak PJ Cameron DE De Backer J Hellemans J Chen Y Davis EC Webb CL Kress W Coucke P Rifkin DB De Paepe AM Dietz HC 《Nature genetics》2005,37(3):275-281
We report heterozygous mutations in the genes encoding either type I or type II transforming growth factor beta receptor in ten families with a newly described human phenotype that includes widespread perturbations in cardiovascular, craniofacial, neurocognitive and skeletal development. Despite evidence that receptors derived from selected mutated alleles cannot support TGFbeta signal propagation, cells derived from individuals heterozygous with respect to these mutations did not show altered kinetics of the acute phase response to administered ligand. Furthermore, tissues derived from affected individuals showed increased expression of both collagen and connective tissue growth factor, as well as nuclear enrichment of phosphorylated Smad2, indicative of increased TGFbeta signaling. These data definitively implicate perturbation of TGFbeta signaling in many common human phenotypes, including craniosynostosis, cleft palate, arterial aneurysms, congenital heart disease and mental retardation, and suggest that comprehensive mechanistic insight will require consideration of both primary and compensatory events. 相似文献
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Mutations in the CEL VNTR cause a syndrome of diabetes and pancreatic exocrine dysfunction 总被引:9,自引:0,他引:9
Raeder H Johansson S Holm PI Haldorsen IS Mas E Sbarra V Nermoen I Eide SA Grevle L Bjørkhaug L Sagen JV Aksnes L Søvik O Lombardo D Molven A Njølstad PR 《Nature genetics》2006,38(1):54-62
Dysfunction of the exocrine pancreas is observed in diabetes, but links between concurrent exocrine and endocrine pancreatic disease and contributing genetic factors are poorly characterized. We studied two families with diabetes and exocrine pancreatic dysfunction by genetic, physiological and in vitro functional studies. A genome-wide screen in Family 1 linked diabetes to chromosome 9q34 (maximal lod score 5.07). Using fecal elastase deficiency as a marker of exocrine pancreatic dysfunction refined the critical chromosomal region to 1.16 Mb (maximal lod score 11.6). Here, we identified a single-base deletion in the variable number of tandem repeats (VNTR)-containing exon 11 of the carboxyl ester lipase (CEL) gene, a major component of pancreatic juice and responsible for the duodenal hydrolysis of cholesterol esters. Screening subjects with maturity-onset diabetes of the young identified Family 2, with another single-base deletion in CEL and a similar phenotype with beta-cell failure and pancreatic exocrine disease. The in vitro catalytic activities of wild-type and mutant CEL protein were comparable. The mutant enzyme was, however, less stable and secreted at a lower rate. Furthermore, we found some evidence for an association between common insertions in the CEL VNTR and exocrine dysfunction in a group of 182 unrelated subjects with diabetes (odds ratio 4.2 (1.6, 11.5)). Our findings link diabetes to the disrupted function of a lipase in the pancreatic acinar cells. 相似文献
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Holm H Gudbjartsson DF Sulem P Masson G Helgadottir HT Zanon C Magnusson OT Helgason A Saemundsdottir J Gylfason A Stefansdottir H Gretarsdottir S Matthiasson SE Thorgeirsson GM Jonasdottir A Sigurdsson A Stefansson H Werge T Rafnar T Kiemeney LA Parvez B Muhammad R Roden DM Darbar D Thorleifsson G Walters GB Kong A Thorsteinsdottir U Arnar DO Stefansson K 《Nature genetics》2011,43(4):316-320
Through complementary application of SNP genotyping, whole-genome sequencing and imputation in 38,384 Icelanders, we have discovered a previously unidentified sick sinus syndrome susceptibility gene, MYH6, encoding the alpha heavy chain subunit of cardiac myosin. A missense variant in this gene, c.2161C>T, results in the conceptual amino acid substitution p.Arg721Trp, has an allelic frequency of 0.38% in Icelanders and associates with sick sinus syndrome with an odds ratio = 12.53 and P = 1.5 × 10?2?. We show that the lifetime risk of being diagnosed with sick sinus syndrome is around 6% for non-carriers of c.2161C>T but is approximately 50% for carriers of the c.2161C>T variant. 相似文献