Guy J

References (5)

Title : Pezizomycetes genomes reveal the molecular basis of ectomycorrhizal truffle lifestyle - Murat_2018_Nat.Ecol.Evol_2_1956
Author(s) : Murat C , Payen T , Noel B , Kuo A , Morin E , Chen J , Kohler A , Krizsan K , Balestrini R , Da Silva C , Montanini B , Hainaut M , Levati E , Barry KW , Belfiori B , Cichocki N , Clum A , Dockter RB , Fauchery L , Guy J , Iotti M , Le Tacon F , Lindquist EA , Lipzen A , Malagnac F , Mello A , Molinier V , Miyauchi S , Poulain J , Riccioni C , Rubini A , Sitrit Y , Splivallo R , Traeger S , Wang M , Zifcakova L , Wipf D , Zambonelli A , Paolocci F , Nowrousian M , Ottonello S , Baldrian P , Spatafora JW , Henrissat B , Nagy LG , Aury JM , Wincker P , Grigoriev IV , Bonfante P , Martin FM
Ref : Nat Ecol Evol , 2 :1956 , 2018
Abstract : Tuberaceae is one of the most diverse lineages of symbiotic truffle-forming fungi. To understand the molecular underpinning of the ectomycorrhizal truffle lifestyle, we compared the genomes of Piedmont white truffle (Tuber magnatum), Perigord black truffle (Tuber melanosporum), Burgundy truffle (Tuber aestivum), pig truffle (Choiromyces venosus) and desert truffle (Terfezia boudieri) to saprotrophic Pezizomycetes. Reconstructed gene duplication/loss histories along a time-calibrated phylogeny of Ascomycetes revealed that Tuberaceae-specific traits may be related to a higher gene diversification rate. Genomic features in Tuber species appear to be very similar, with high transposon content, few genes coding lignocellulose-degrading enzymes, a substantial set of lineage-specific fruiting-body-upregulated genes and high expression of genes involved in volatile organic compound metabolism. Developmental and metabolic pathways expressed in ectomycorrhizae and fruiting bodies of T. magnatum and T. melanosporum are unexpectedly very similar, owing to the fact that they diverged ~100 Ma. Volatile organic compounds from pungent truffle odours are not the products of Tuber-specific gene innovations, but rely on the differential expression of an existing gene repertoire. These genomic resources will help to address fundamental questions in the evolution of the truffle lifestyle and the ecology of fungi that have been praised as food delicacies for centuries.
ESTHER : Murat_2018_Nat.Ecol.Evol_2_1956
PubMedSearch : Murat_2018_Nat.Ecol.Evol_2_1956
PubMedID: 30420746
Gene_locus related to this paper: 9pezi-a0a3n4l4q5 , 9pezi-a0a3n4lpg7

Title : Two genomes of highly polyphagous lepidopteran pests (Spodoptera frugiperda, Noctuidae) with different host-plant ranges - Gouin_2017_Sci.Rep_7_11816
Author(s) : Gouin A , Bretaudeau A , Nam K , Gimenez S , Aury JM , Duvic B , Hilliou F , Durand N , Montagne N , Darboux I , Kuwar S , Chertemps T , Siaussat D , Bretschneider A , Mone Y , Ahn SJ , Hanniger S , Grenet AG , Neunemann D , Maumus F , Luyten I , Labadie K , Xu W , Koutroumpa F , Escoubas JM , Llopis A , Mabeche-Coisne M , Salasc F , Tomar A , Anderson AR , Khan SA , Dumas P , Orsucci M , Guy J , Belser C , Alberti A , Noel B , Couloux A , Mercier J , Nidelet S , Dubois E , Liu NY , Boulogne I , Mirabeau O , Le Goff G , Gordon K , Oakeshott J , Consoli FL , Volkoff AN , Fescemyer HW , Marden JH , Luthe DS , Herrero S , Heckel DG , Wincker P , Kergoat GJ , Amselem J , Quesneville H , Groot AT , Jacquin-Joly E , Negre N , Lemaitre C , Legeai F , d'Alencon E , Fournier P
Ref : Sci Rep , 7 :11816 , 2017
Abstract : Emergence of polyphagous herbivorous insects entails significant adaptation to recognize, detoxify and digest a variety of host-plants. Despite of its biological and practical importance - since insects eat 20% of crops - no exhaustive analysis of gene repertoires required for adaptations in generalist insect herbivores has previously been performed. The noctuid moth Spodoptera frugiperda ranks as one of the world's worst agricultural pests. This insect is polyphagous while the majority of other lepidopteran herbivores are specialist. It consists of two morphologically indistinguishable strains ("C" and "R") that have different host plant ranges. To describe the evolutionary mechanisms that both enable the emergence of polyphagous herbivory and lead to the shift in the host preference, we analyzed whole genome sequences from laboratory and natural populations of both strains. We observed huge expansions of genes associated with chemosensation and detoxification compared with specialist Lepidoptera. These expansions are largely due to tandem duplication, a possible adaptation mechanism enabling polyphagy. Individuals from natural C and R populations show significant genomic differentiation. We found signatures of positive selection in genes involved in chemoreception, detoxification and digestion, and copy number variation in the two latter gene families, suggesting an adaptive role for structural variation.
ESTHER : Gouin_2017_Sci.Rep_7_11816
PubMedSearch : Gouin_2017_Sci.Rep_7_11816
PubMedID: 28947760

Title : DNA methylation reader MECP2: cell type- and differentiation stage-specific protein distribution - Song_2014_Epigenetics.Chromatin_7_17
Author(s) : Song C , Feodorova Y , Guy J , Peichl L , Jost KL , Kimura H , Cardoso MC , Bird A , Leonhardt H , Joffe B , Solovei I
Ref : Epigenetics Chromatin , 7 :17 , 2014
Abstract : BACKGROUND: Methyl-CpG binding protein 2 (MECP2) is a protein that specifically binds methylated DNA, thus regulating transcription and chromatin organization. Mutations in the gene have been identified as the principal cause of Rett syndrome, a severe neurological disorder. Although the role of MECP2 has been extensively studied in nervous tissues, still very little is known about its function and cell type specific distribution in other tissues. RESULTS: Using immunostaining on tissue cryosections, we characterized the distribution of MECP2 in 60 cell types of 16 mouse neuronal and non-neuronal tissues. We show that MECP2 is expressed at a very high level in all retinal neurons except rod photoreceptors. The onset of its expression during retina development coincides with massive synapse formation. In contrast to astroglia, retinal microglial cells lack MECP2, similar to microglia in the brain, cerebellum, and spinal cord. MECP2 is also present in almost all non-neural cell types, with the exception of intestinal epithelial cells, erythropoietic cells, and hair matrix keratinocytes. Our study demonstrates the role of MECP2 as a marker of the differentiated state in all studied cells other than oocytes and spermatogenic cells. MECP2-deficient male (Mecp2 (-/y) ) mice show no apparent defects in the morphology and development of the retina. The nuclear architecture of retinal neurons is also unaffected as the degree of chromocenter fusion and the distribution of major histone modifications do not differ between Mecp2 (-/y) and Mecp2 (wt) mice. Surprisingly, the absence of MECP2 is not compensated by other methyl-CpG binding proteins. On the contrary, their mRNA levels were downregulated in Mecp2 (-/y) mice. CONCLUSIONS: MECP2 is almost universally expressed in all studied cell types with few exceptions, including microglia. MECP2 deficiency does not change the nuclear architecture and epigenetic landscape of retinal cells despite the missing compensatory expression of other methyl-CpG binding proteins. Furthermore, retinal development and morphology are also preserved in Mecp2-null mice. Our study reveals the significance of MECP2 function in cell differentiation and sets the basis for future investigations in this direction.
ESTHER : Song_2014_Epigenetics.Chromatin_7_17
PubMedSearch : Song_2014_Epigenetics.Chromatin_7_17
PubMedID: 25170345

Title : Natural methods of protein stabilization: thermostable biocatalysts - Littlechild_2007_Biochem.Soc.Trans_35_1558
Author(s) : Littlechild JA , Guy J , Connelly S , Mallett L , Waddell S , Rye CA , Line K , Isupov M
Ref : Biochemical Society Transactions , 35 :1558 , 2007
Abstract : Enzymes that are naturally found in thermophilic and hyperthermophilic organisms are being used as robust biocatalysts in the fine chemical and pharmaceutical industries. They have important use in these industries due to their increased stability which is often required during commercial reaction conditions. The approach used in these studies is to learn how nature has managed to stabilize these proteins using a detailed knowledge of their biochemical properties and three-dimensional structures. This is illustrated with several different classes of enzyme that have been studied at Exeter. These include alcohol dehydrogenase, aminoacylase, pyroglutamyl carboxypeptidase, gamma-lactamase, dehalogenase and lysophospholipase.
ESTHER : Littlechild_2007_Biochem.Soc.Trans_35_1558
PubMedSearch : Littlechild_2007_Biochem.Soc.Trans_35_1558
PubMedID: 18031266

Title : DNA sequence and analysis of human chromosome 9 - Humphray_2004_Nature_429_369
Author(s) : Humphray SJ , Oliver K , Hunt AR , Plumb RW , Loveland JE , Howe KL , Andrews TD , Searle S , Hunt SE , Scott CE , Jones MC , Ainscough R , Almeida JP , Ambrose KD , Ashwell RI , Babbage AK , Babbage S , Bagguley CL , Bailey J , Banerjee R , Barker DJ , Barlow KF , Bates K , Beasley H , Beasley O , Bird CP , Bray-Allen S , Brown AJ , Brown JY , Burford D , Burrill W , Burton J , Carder C , Carter NP , Chapman JC , Chen Y , Clarke G , Clark SY , Clee CM , Clegg S , Collier RE , Corby N , Crosier M , Cummings AT , Davies J , Dhami P , Dunn M , Dutta I , Dyer LW , Earthrowl ME , Faulkner L , Fleming CJ , Frankish A , Frankland JA , French L , Fricker DG , Garner P , Garnett J , Ghori J , Gilbert JG , Glison C , Grafham DV , Gribble S , Griffiths C , Griffiths-Jones S , Grocock R , Guy J , Hall RE , Hammond S , Harley JL , Harrison ES , Hart EA , Heath PD , Henderson CD , Hopkins BL , Howard PJ , Howden PJ , Huckle E , Johnson C , Johnson D , Joy AA , Kay M , Keenan S , Kershaw JK , Kimberley AM , King A , Knights A , Laird GK , Langford C , Lawlor S , Leongamornlert DA , Leversha M , Lloyd C , Lloyd DM , Lovell J , Martin S , Mashreghi-Mohammadi M , Matthews L , Mclaren S , McLay KE , McMurray A , Milne S , Nickerson T , Nisbett J , Nordsiek G , Pearce AV , Peck AI , Porter KM , Pandian R , Pelan S , Phillimore B , Povey S , Ramsey Y , Rand V , Scharfe M , Sehra HK , Shownkeen R , Sims SK , Skuce CD , Smith M , Steward CA , Swarbreck D , Sycamore N , Tester J , Thorpe A , Tracey A , Tromans A , Thomas DW , Wall M , Wallis JM , West AP , Whitehead SL , Willey DL , Williams SA , Wilming L , Wray PW , Young L , Ashurst JL , Coulson A , Blocker H , Durbin R , Sulston JE , Hubbard T , Jackson MJ , Bentley DR , Beck S , Rogers J , Dunham I
Ref : Nature , 429 :369 , 2004
Abstract : Chromosome 9 is highly structurally polymorphic. It contains the largest autosomal block of heterochromatin, which is heteromorphic in 6-8% of humans, whereas pericentric inversions occur in more than 1% of the population. The finished euchromatic sequence of chromosome 9 comprises 109,044,351 base pairs and represents >99.6% of the region. Analysis of the sequence reveals many intra- and interchromosomal duplications, including segmental duplications adjacent to both the centromere and the large heterochromatic block. We have annotated 1,149 genes, including genes implicated in male-to-female sex reversal, cancer and neurodegenerative disease, and 426 pseudogenes. The chromosome contains the largest interferon gene cluster in the human genome. There is also a region of exceptionally high gene and G + C content including genes paralogous to those in the major histocompatibility complex. We have also detected recently duplicated genes that exhibit different rates of sequence divergence, presumably reflecting natural selection.
ESTHER : Humphray_2004_Nature_429_369
PubMedSearch : Humphray_2004_Nature_429_369
PubMedID: 15164053
Gene_locus related to this paper: human-CEL