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Author Report for: Town CD

Title: Araport11: a complete reannotation of the Arabidopsis thaliana reference genome
Cheng CY, Krishnakumar V, Chan AP, Thibaud-Nissen F, Schobel S, Town CD
Ref: Plant J, 89:789, 2017 : PubMed
Abstract


ESTHER: Cheng_2017_Plant.J_89_789
PubMedSearch: Cheng 2017 Plant.J 89 789
PubMedID: 27862469
Gene_locus related to this paper: arath-AT5G20520, arath-F1N13.220, arath-CXE6, arath-At1g15070, arath-a0a1p8awg3, arath-a0a1p8bcz0

Abstract

The flowering plant Arabidopsis thaliana is a dicot model organism for research in many aspects of plant biology. A comprehensive annotation of its genome paves the way for understanding the functions and activities of all types of transcripts, including mRNA, the various classes of non-coding RNA, and small RNA. The TAIR10 annotation update had a profound impact on Arabidopsis research but was released more than 5 years ago. Maintaining the accuracy of the annotation continues to be a prerequisite for future progress. Using an integrative annotation pipeline, we assembled tissue-specific RNA-Seq libraries from 113 datasets and constructed 48 359 transcript models of protein-coding genes in eleven tissues. In addition, we annotated various classes of non-coding RNA including microRNA, long intergenic RNA, small nucleolar RNA, natural antisense transcript, small nuclear RNA, and small RNA using published datasets and in-house analytic results. Altogether, we identified 635 novel protein-coding genes, 508 novel transcribed regions, 5178 non-coding RNAs, and 35 846 small RNA loci that were formerly unannotated. Analysis of the splicing events and RNA-Seq based expression profiles revealed the landscapes of gene structures, untranslated regions, and splicing activities to be more intricate than previously appreciated. Furthermore, we present 692 uniformly expressed housekeeping genes, 43% of whose human orthologs are also housekeeping genes. This updated Arabidopsis genome annotation with a substantially increased resolution of gene models will not only further our understanding of the biological processes of this plant model but also of other species.



        

Title: Plant genetics. Early allopolyploid evolution in the post-Neolithic Brassica napus oilseed genome
Chalhoub B, Denoeud F, Liu S, Parkin IA, Tang H, Wang X, Chiquet J, Belcram H, Tong C and Wincker P <70 more author(s)> Chalhoub B, Denoeud F, Liu S, Parkin IA, Tang H, Wang X, Chiquet J, Belcram H, Tong C, Samans B, Correa M, Da Silva C, Just J, Falentin C, Koh CS, Le Clainche I, Bernard M, Bento P, Noel B, Labadie K, Alberti A, Charles M, Arnaud D, Guo H, Daviaud C, Alamery S, Jabbari K, Zhao M, Edger PP, Chelaifa H, Tack D, Lassalle G, Mestiri I, Schnel N, Le Paslier MC, Fan G, Renault V, Bayer PE, Golicz AA, Manoli S, Lee TH, Thi VH, Chalabi S, Hu Q, Fan C, Tollenaere R, Lu Y, Battail C, Shen J, Sidebottom CH, Canaguier A, Chauveau A, Berard A, Deniot G, Guan M, Liu Z, Sun F, Lim YP, Lyons E, Town CD, Bancroft I, Meng J, Ma J, Pires JC, King GJ, Brunel D, Delourme R, Renard M, Aury JM, Adams KL, Batley J, Snowdon RJ, Tost J, Edwards D, Zhou Y, Hua W, Sharpe AG, Paterson AH, Guan C, Wincker P (- 70)
Ref: Science, 345:950, 2014 : PubMed
Abstract


ESTHER: Chalhoub_2014_Science_345_950
PubMedSearch: Chalhoub 2014 Science 345 950
PubMedID: 25146293
Gene_locus related to this paper: braol-Q8GTM3, braol-Q8GTM4, brana-a0a078j4a9, brana-a0a078e1m0, brana-a0a078cd75, brana-a0a078evd3, brana-a0a078j4f0, brana-a0a078cta5, brana-a0a078cus4, brana-a0a078f8c2, brana-a0a078jql1, brana-a0a078dgj3, brana-a0a078hw50, brana-a0a078cuu0, brana-a0a078iyl8, brana-a0a078dfa9, brana-a0a078ic91, brana-a0a078cnf7, brana-a0a078fh41, brana-a0a078ca65, brana-a0a078ctc8, brana-a0a078h021, brana-a0a078h0h8, brana-a0a078jx23, brana-a0a078ci96, brana-a0a078cqd7, brana-a0a078dh94, brana-a0a078h612, brana-a0a078ild2, brana-a0a078j2t3, braol-a0a0d3dpb2, braol-a0a0d3dx76, brana-a0a078jxa8, brana-a0a078i2k3, braol-a0a0d3ef55, brarp-m4dcj8, brana-a0a078fw53, brana-a0a078itf3, brana-a0a078jsn1, brana-a0a078jrt9, brana-a0a078i6d2, brana-a0a078jku0

Abstract

Oilseed rape (Brassica napus L.) was formed ~7500 years ago by hybridization between B. rapa and B. oleracea, followed by chromosome doubling, a process known as allopolyploidy. Together with more ancient polyploidizations, this conferred an aggregate 72x genome multiplication since the origin of angiosperms and high gene content. We examined the B. napus genome and the consequences of its recent duplication. The constituent An and Cn subgenomes are engaged in subtle structural, functional, and epigenetic cross-talk, with abundant homeologous exchanges. Incipient gene loss and expression divergence have begun. Selection in B. napus oilseed types has accelerated the loss of glucosinolate genes, while preserving expansion of oil biosynthesis genes. These processes provide insights into allopolyploid evolution and its relationship with crop domestication and improvement.



        

Title: Transcriptome and methylome profiling reveals relics of genome dominance in the mesopolyploid Brassica oleracea
Parkin IA, Koh C, Tang H, Robinson SJ, Kagale S, Clarke WE, Town CD, Nixon J, Krishnakumar V and Sharpe AG <22 more author(s)> Parkin IA, Koh C, Tang H, Robinson SJ, Kagale S, Clarke WE, Town CD, Nixon J, Krishnakumar V, Bidwell SL, Denoeud F, Belcram H, Links MG, Just J, Clarke C, Bender T, Huebert T, Mason AS, Pires JC, Barker G, Moore J, Walley PG, Manoli S, Batley J, Edwards D, Nelson MN, Wang X, Paterson AH, King G, Bancroft I, Chalhoub B, Sharpe AG (- 22)
Ref: Genome Biol, 15:R77, 2014 : PubMed
Abstract


ESTHER: Parkin_2014_Genome.Biol_15_R77
PubMedSearch: Parkin 2014 Genome.Biol 15 R77
PubMedID: 24916971
Gene_locus related to this paper: braol-a0a0d3dpb2, braol-a0a0d3dx76, brana-a0a078jxa8, brana-a0a078i2k3, braol-a0a0d3ef55, braol-a0a0d3bur9, braol-a0a0d3ck99, braol-a0a0d3cns1, braol-a0a0d3e654, brana-a0a078i6d2, braol-a0a0d3a922

Abstract

BACKGROUND: Brassica oleracea is a valuable vegetable species that has contributed to human health and nutrition for hundreds of years and comprises multiple distinct cultivar groups with diverse morphological and phytochemical attributes. In addition to this phenotypic wealth, B. oleracea offers unique insights into polyploid evolution, as it results from multiple ancestral polyploidy events and a final Brassiceae-specific triplication event. Further, B. oleracea represents one of the diploid genomes that formed the economically important allopolyploid oilseed, Brassica napus. A deeper understanding of B. oleracea genome architecture provides a foundation for crop improvement strategies throughout the Brassica genus.
RESULTS: We generate an assembly representing 75% of the predicted B. oleracea genome using a hybrid Illumina/Roche 454 approach. Two dense genetic maps are generated to anchor almost 92% of the assembled scaffolds to nine pseudo-chromosomes. Over 50,000 genes are annotated and 40% of the genome predicted to be repetitive, thus contributing to the increased genome size of B. oleracea compared to its close relative B. rapa. A snapshot of both the leaf transcriptome and methylome allows comparisons to be made across the triplicated sub-genomes, which resulted from the most recent Brassiceae-specific polyploidy event.
CONCLUSIONS: Differential expression of the triplicated syntelogs and cytosine methylation levels across the sub-genomes suggest residual marks of the genome dominance that led to the current genome architecture. Although cytosine methylation does not correlate with individual gene dominance, the independent methylation patterns of triplicated copies suggest epigenetic mechanisms play a role in the functional diversification of duplicate genes.



        

Title: Phylogenomics and the dynamic genome evolution of the genus Streptococcus
Richards VP, Palmer SR, Pavinski Bitar PD, Qin X, Weinstock GM, Highlander SK, Town CD, Burne RA, Stanhope MJ
Ref: Genome Biol Evol, 6:741, 2014 : PubMed
Abstract


ESTHER: Richards_2014_Genome.Biol.Evol_6_741
PubMedSearch: Richards 2014 Genome.Biol.Evol 6 741
PubMedID: 24625962
Gene_locus related to this paper: strpo-f3l7j8, 9stre-g5k932, 9stre-g5ki10

Abstract

The genus Streptococcus comprises important pathogens that have a severe impact on human health and are responsible for substantial economic losses to agriculture. Here, we utilize 46 Streptococcus genome sequences (44 species), including eight species sequenced here, to provide the first genomic level insight into the evolutionary history and genetic basis underlying the functional diversity of all major groups of this genus. Gene gain/loss analysis revealed a dynamic pattern of genome evolution characterized by an initial period of gene gain followed by a period of loss, as the major groups within the genus diversified. This was followed by a period of genome expansion associated with the origins of the present extant species. The pattern is concordant with an emerging view that genomes evolve through a dynamic process of expansion and streamlining. A large proportion of the pan-genome has experienced lateral gene transfer (LGT) with causative factors, such as relatedness and shared environment, operating over different evolutionary scales. Multiple gene ontology terms were significantly enriched for each group, and mapping terms onto the phylogeny showed that those corresponding to genes born on branches leading to the major groups represented approximately one-fifth of those enriched. Furthermore, despite the extensive LGT, several biochemical characteristics have been retained since group formation, suggesting genomic cohesiveness through time, and that these characteristics may be fundamental to each group. For example, proteolysis: mitis group; urea metabolism: salivarius group; carbohydrate metabolism: pyogenic group; and transcription regulation: bovis group.



        

Title: An improved genome release (version Mt4.0) for the model legume Medicago truncatula
Tang H, Krishnakumar V, Bidwell S, Rosen B, Chan A, Zhou S, Gentzbittel L, Childs KL, Yandell M and Town CD <3 more author(s)> Tang H, Krishnakumar V, Bidwell S, Rosen B, Chan A, Zhou S, Gentzbittel L, Childs KL, Yandell M, Gundlach H, Mayer KF, Schwartz DC, Town CD (- 3)
Ref: BMC Genomics, 15:312, 2014 : PubMed
Abstract


ESTHER: Tang_2014_BMC.Genomics_15_312
PubMedSearch: Tang 2014 BMC.Genomics 15 312
PubMedID: 24767513
Gene_locus related to this paper: medtr-q1s5d8, medtr-q1s9m3, medtr-q1t171, medtr-g7iam1, medtr-g7iam3, medtr-a0a072vrv9, medtr-g7kmk5, medtr-a0a072uuf6, medtr-a0a072urp3, medtr-g7zzc3, medtr-g7ie19, medtr-g7kst7, medtr-a0a072u5k5, medtr-a0a072v056, medtr-scp1

Abstract

BACKGROUND: Medicago truncatula, a close relative of alfalfa, is a preeminent model for studying nitrogen fixation, symbiosis, and legume genomics. The Medicago sequencing project began in 2003 with the goal to decipher sequences originated from the euchromatic portion of the genome. The initial sequencing approach was based on a BAC tiling path, culminating in a BAC-based assembly (Mt3.5) as well as an in-depth analysis of the genome published in 2011.
RESULTS: Here we describe a further improved and refined version of the M. truncatula genome (Mt4.0) based on de novo whole genome shotgun assembly of a majority of Illumina and 454 reads using ALLPATHS-LG. The ALLPATHS-LG scaffolds were anchored onto the pseudomolecules on the basis of alignments to both the optical map and the genotyping-by-sequencing (GBS) map. The Mt4.0 pseudomolecules encompass ~360 Mb of actual sequences spanning 390 Mb of which ~330 Mb align perfectly with the optical map, presenting a drastic improvement over the BAC-based Mt3.5 which only contained 70% sequences (~250 Mb) of the current version. Most of the sequences and genes that previously resided on the unanchored portion of Mt3.5 have now been incorporated into the Mt4.0 pseudomolecules, with the exception of ~28 Mb of unplaced sequences. With regard to gene annotation, the genome has been re-annotated through our gene prediction pipeline, which integrates EST, RNA-seq, protein and gene prediction evidences. A total of 50,894 genes (31,661 high confidence and 19,233 low confidence) are included in Mt4.0 which overlapped with ~82% of the gene loci annotated in Mt3.5. Of the remaining genes, 14% of the Mt3.5 genes have been deprecated to an "unsupported" status and 4% are absent from the Mt4.0 predictions.
CONCLUSIONS: Mt4.0 and its associated resources, such as genome browsers, BLAST-able datasets and gene information pages, can be found on the JCVI Medicago web site (http://www.jcvi.org/medicago). The assembly and annotation has been deposited in GenBank (BioProject: PRJNA10791). The heavily curated chromosomal sequences and associated gene models of Medicago will serve as a better reference for legume biology and comparative genomics.



        

Title: The Medicago genome provides insight into the evolution of rhizobial symbioses
Young ND, Debelle F, Oldroyd GE, Geurts R, Cannon SB, Udvardi MK, Benedito VA, Mayer KF, Gouzy J and Roe BA <114 more author(s)> Young ND, Debelle F, Oldroyd GE, Geurts R, Cannon SB, Udvardi MK, Benedito VA, Mayer KF, Gouzy J, Schoof H, Van de Peer Y, Proost S, Cook DR, Meyers BC, Spannagl M, Cheung F, De Mita S, Krishnakumar V, Gundlach H, Zhou S, Mudge J, Bharti AK, Murray JD, Naoumkina MA, Rosen B, Silverstein KA, Tang H, Rombauts S, Zhao PX, Zhou P, Barbe V, Bardou P, Bechner M, Bellec A, Berger A, Berges H, Bidwell S, Bisseling T, Choisne N, Couloux A, Denny R, Deshpande S, Dai X, Doyle JJ, Dudez AM, Farmer AD, Fouteau S, Franken C, Gibelin C, Gish J, Goldstein S, Gonzalez AJ, Green PJ, Hallab A, Hartog M, Hua A, Humphray SJ, Jeong DH, Jing Y, Jocker A, Kenton SM, Kim DJ, Klee K, Lai H, Lang C, Lin S, Macmil SL, Magdelenat G, Matthews L, McCorrison J, Monaghan EL, Mun JH, Najar FZ, Nicholson C, Noirot C, O'Bleness M, Paule CR, Poulain J, Prion F, Qin B, Qu C, Retzel EF, Riddle C, Sallet E, Samain S, Samson N, Sanders I, Saurat O, Scarpelli C, Schiex T, Segurens B, Severin AJ, Sherrier DJ, Shi R, Sims S, Singer SR, Sinharoy S, Sterck L, Viollet A, Wang BB, Wang K, Wang M, Wang X, Warfsmann J, Weissenbach J, White DD, White JD, Wiley GB, Wincker P, Xing Y, Yang L, Yao Z, Ying F, Zhai J, Zhou L, Zuber A, Denarie J, Dixon RA, May GD, Schwartz DC, Rogers J, Quetier F, Town CD, Roe BA (- 114)
Ref: Nature, 480:520, 2011 : PubMed
Abstract


ESTHER: Young_2011_Nature_480_520
PubMedSearch: Young 2011 Nature 480 520
PubMedID: 22089132
Gene_locus related to this paper: medtr-b7fki4, medtr-b7fmi1, medtr-g7itl1, medtr-g7iu67, medtr-g7izm0, medtr-g7j641, medtr-g7jtf8, medtr-g7jtg2, medtr-g7jtg4, medtr-g7kem3, medtr-g7kml3, medtr-g7ksx5, medtr-g7leb3, medtr-q1s5d8, medtr-q1s9m3, medtr-q1t171, medtr-g7k9e1, medtr-g7k9e3, medtr-g7k9e5, medtr-g7k9e8, medtr-g7k9e9, medtr-g7lbp2, medtr-g7lch3, medtr-g7ib94, medtr-g7ljk8, medtr-g7i6w5, medtr-g7kvg4, medtr-g7iam1, medtr-g7iam3, medtr-g7l754, medtr-g7jr41, medtr-g7l4f5, medtr-g7l755, medtr-a0a072vyl4, medtr-g7jwk8, medtr-a0a072vhg0, medtr-a0a072vrv9, medtr-g7kmk5, medtr-a0a072uuf6, medtr-a0a072urp3, medtr-g7zzc3, medtr-g7ie19, medtr-g7kst7, medtr-a0a072u5k5, medtr-a0a072v056, medtr-scp1

Abstract

Legumes (Fabaceae or Leguminosae) are unique among cultivated plants for their ability to carry out endosymbiotic nitrogen fixation with rhizobial bacteria, a process that takes place in a specialized structure known as the nodule. Legumes belong to one of the two main groups of eurosids, the Fabidae, which includes most species capable of endosymbiotic nitrogen fixation. Legumes comprise several evolutionary lineages derived from a common ancestor 60 million years ago (Myr ago). Papilionoids are the largest clade, dating nearly to the origin of legumes and containing most cultivated species. Medicago truncatula is a long-established model for the study of legume biology. Here we describe the draft sequence of the M. truncatula euchromatin based on a recently completed BAC assembly supplemented with Illumina shotgun sequence, together capturing approximately 94% of all M. truncatula genes. A whole-genome duplication (WGD) approximately 58 Myr ago had a major role in shaping the M. truncatula genome and thereby contributed to the evolution of endosymbiotic nitrogen fixation. Subsequent to the WGD, the M. truncatula genome experienced higher levels of rearrangement than two other sequenced legumes, Glycine max and Lotus japonicus. M. truncatula is a close relative of alfalfa (Medicago sativa), a widely cultivated crop with limited genomics tools and complex autotetraploid genetics. As such, the M. truncatula genome sequence provides significant opportunities to expand alfalfa's genomic toolbox.



        

Title: Simultaneous high-throughput recombinational cloning of open reading frames in closed and open configurations
Underwood BA, Vanderhaeghen R, Whitford R, Town CD, Hilson P
Ref: Plant Biotechnol J, 4:317, 2006 : PubMed
Abstract


ESTHER: Underwood_2006_Plant.Biotechnol.J_4_317
PubMedSearch: Underwood 2006 Plant.Biotechnol.J 4 317
PubMedID: 17147637
Gene_locus related to this paper: arath-SCP22

Abstract

Comprehensive open reading frame (ORF) clone collections, ORFeomes, are key components of functional genomics projects. When recombinational cloning systems are used to capture ORFs in master clones, these DNA sequences can be easily transferred into a variety of expression plasmids, each designed for a specific assay. Depending on downstream applications, an ORF is cloned either with or without a stop codon at its original position, referred to as closed or open configuration, respectively. The former is preferred when the encoded protein is produced in its native form or with an amino-terminal tag; the latter is obligatory when the protein is produced as a fusion with a carboxyl-terminal tag. We developed a streamlined protocol for high-throughput, simultaneous cloning of both open and closed ORF entry clones with the Gateway recombinational cloning system. The protocol is straightforward to set up in large-scale ORF cloning projects, and is cost-effective, because the initial ORF amplification and the cloning in a pDONR vector are performed only once to obtain the two ORF configurations. We illustrated its implementation for the isolation and validation of 346 Arabidopsis ORF entry clones.



        

Title: Transcript profiling coupled with spatial expression analyses reveals genes involved in distinct developmental stages of an arbuscular mycorrhizal symbiosis
Liu J, Blaylock LA, Endre G, Cho J, Town CD, VandenBosch KA, Harrison MJ
Ref: Plant Cell, 15:2106, 2003 : PubMed
Abstract


ESTHER: Liu_2003_Plant.Cell_15_2106
PubMedSearch: Liu 2003 Plant.Cell 15 2106
PubMedID: 12953114
Gene_locus related to this paper: medtr-q6w6r6

Abstract

The formation of symbiotic associations with arbuscular mycorrhizal (AM) fungi is a phenomenon common to the majority of vascular flowering plants. Here, we used cDNA arrays to examine transcript profiles in Medicago truncatula roots during the development of an AM symbiosis with Glomus versiforme and during growth under differing phosphorus nutrient regimes. Three percent of the genes examined showed significant changes in transcript levels during the development of the symbiosis. Most genes showing increased transcript levels in mycorrhizal roots showed no changes in response to high phosphorus, suggesting that alterations in transcript levels during symbiosis were a consequence of the AM fungus rather than a secondary effect of improved phosphorus nutrition. Among the mycorrhiza-induced genes, two distinct temporal expression patterns were evident. Members of one group showed an increase in transcripts during the initial period of contact between the symbionts and a subsequent decrease as the symbiosis developed. Defense- and stress-response genes were a significant component of this group. Genes in the second group showed a sustained increase in transcript levels that correlated with the colonization of the root system. The latter group contained a significant proportion of new genes similar to components of signal transduction pathways, suggesting that novel signaling pathways are activated during the development of the symbiosis. Analysis of the spatial expression patterns of two mycorrhiza-induced genes revealed distinct expression patterns consistent with the hypothesis that gene expression in mycorrhizal roots is signaled by both cell-autonomous and cell-nonautonomous signals.



        

Title: Full-length messenger RNA sequences greatly improve genome annotation
Haas BJ, Volfovsky N, Town CD, Troukhan M, Alexandrov N, Feldmann KA, Flavell RB, White O, Salzberg SL
Ref: Genome Biol, 3:RESEARCH0029, 2002 : PubMed
Abstract


ESTHER: Haas_2002_Genome.Biol_3_RESEARCH0029
PubMedSearch: Haas 2002 Genome.Biol 3 RESEARCH0029
PubMedID: 12093376
Gene_locus related to this paper: arath-AT1G74640, arath-At2g47630, arath-AT4G17480, arath-AT4G24380, arath-At5g11650, arath-AT5G19290, arath-AT5G19630, arath-AT5G20060, arath-AT5G20520, arath-AtD14, arath-F1O17.3, arath-F1O17.5, arath-F1P2.110, arath-F12L6.7, arath-F22K18.40, arath-At3g60340, arath-LCAT1, arath-PLA16, arath-Q8L996, arath-q8lae9, arath-Q8LF34, arath-Q8LFB7, arath-Q8LFU1, arath-q8s8g6, arath-q9ffg7, arath-Q9LNR2, arath-SCP40, arath-At4g12230, arath-AT4G10030, arath-T5M16.2, arath-MES14, arath-T19F11.2, arath-Y1457, arath-T26B15.8, arath-SFGH, arath-f4jt64

Abstract

BACKGROUND: Annotation of eukaryotic genomes is a complex endeavor that requires the integration of evidence from multiple, often contradictory, sources. With the ever-increasing amount of genome sequence data now available, methods for accurate identification of large numbers of genes have become urgently needed. In an effort to create a set of very high-quality gene models, we used the sequence of 5,000 full-length gene transcripts from Arabidopsis to re-annotate its genome. We have mapped these transcripts to their exact chromosomal locations and, using alignment programs, have created gene models that provide a reference set for this organism.
RESULTS: Approximately 35% of the transcripts indicated that previously annotated genes needed modification, and 5% of the transcripts represented newly discovered genes. We also discovered that multiple transcription initiation sites appear to be much more common than previously known, and we report numerous cases of alternative mRNA splicing. We include a comparison of different alignment software and an analysis of how the transcript data improved the previously published annotation.
CONCLUSIONS: Our results demonstrate that sequencing of large numbers of full-length transcripts followed by computational mapping greatly improves identification of the complete exon structures of eukaryotic genes. In addition, we are able to find numerous introns in the untranslated regions of the genes.



        

Title: Sequence and analysis of chromosome 3 of the plant Arabidopsis thaliana
Salanoubat M, Lemcke K, Rieger M, Ansorge W, Unseld M, Fartmann B, Valle G, Blocker H, Perez-Alonso M and Tabata S <127 more author(s)> Salanoubat M, Lemcke K, Rieger M, Ansorge W, Unseld M, Fartmann B, Valle G, Blocker H, Perez-Alonso M, Obermaier B, Delseny M, Boutry M, Grivell LA, Mache R, Puigdomenech P, de Simone V, Choisne N, Artiguenave F, Robert C, Brottier P, Wincker P, Cattolico L, Weissenbach J, Saurin W, Quetier F, Schafer M, Muller-Auer S, Gabel C, Fuchs M, Benes V, Wurmbach E, Drzonek H, Erfle H, Jordan N, Bangert S, Wiedelmann R, Kranz H, Voss H, Holland R, Brandt P, Nyakatura G, Vezzi A, D'Angelo M, Pallavicini A, Toppo S, Simionati B, Conrad A, Hornischer K, Kauer G, Lohnert TH, Nordsiek G, Reichelt J, Scharfe M, Schon O, Bargues M, Terol J, Climent J, Navarro P, Collado C, Perez-Perez A, Ottenwalder B, Duchemin D, Cooke R, Laudie M, Berger-Llauro C, Purnelle B, Masuy D, de Haan M, Maarse AC, Alcaraz JP, Cottet A, Casacuberta E, Monfort A, Argiriou A, Flores M, Liguori R, Vitale D, Mannhaupt G, Haase D, Schoof H, Rudd S, Zaccaria P, Mewes HW, Mayer KF, Kaul S, Town CD, Koo HL, Tallon LJ, Jenkins J, Rooney T, Rizzo M, Walts A, Utterback T, Fujii CY, Shea TP, Creasy TH, Haas B, Maiti R, Wu D, Peterson J, Van Aken S, Pai G, Militscher J, Sellers P, Gill JE, Feldblyum TV, Preuss D, Lin X, Nierman WC, Salzberg SL, White O, Venter JC, Fraser CM, Kaneko T, Nakamura Y, Sato S, Kato T, Asamizu E, Sasamoto S, Kimura T, Idesawa K, Kawashima K, Kishida Y, Kiyokawa C, Kohara M, Matsumoto M, Matsuno A, Muraki A, Nakayama S, Nakazaki N, Shinpo S, Takeuchi C, Wada T, Watanabe A, Yamada M, Yasuda M, Tabata S (- 127)
Ref: Nature, 408:820, 2000 : PubMed
Abstract


ESTHER: Salanoubat_2000_Nature_408_820
PubMedSearch: Salanoubat 2000 Nature 408 820
PubMedID: 11130713
Gene_locus related to this paper: arath-MES17, arath-AT3G12150, arath-At3g61680, arath-AT3g62590, arath-CXE12, arath-eds1, arath-SCP25, arath-F1P2.110, arath-F1P2.140, arath-F11F8.28, arath-F14D17.80, arath-F16B3.4, arath-SCP27, arath-At3g50790, arath-At3g05600, arath-PAD4, arath-At3g51000, arath-SCP16, arath-gid1, arath-GID1B, arath-Q9LUG8, arath-Q84JS1, arath-Q9SFF6, arath-q9m236, arath-q9sr22, arath-q9sr23, arath-SCP7, arath-SCP14, arath-SCP15, arath-SCP17, arath-SCP36, arath-SCP37, arath-SCP39, arath-SCP40, arath-SCP49, arath-T19F11.2

Abstract

Arabidopsis thaliana is an important model system for plant biologists. In 1996 an international collaboration (the Arabidopsis Genome Initiative) was formed to sequence the whole genome of Arabidopsis and in 1999 the sequence of the first two chromosomes was reported. The sequence of the last three chromosomes and an analysis of the whole genome are reported in this issue. Here we present the sequence of chromosome 3, organized into four sequence segments (contigs). The two largest (13.5 and 9.2 Mb) correspond to the top (long) and the bottom (short) arms of chromosome 3, and the two small contigs are located in the genetically defined centromere. This chromosome encodes 5,220 of the roughly 25,500 predicted protein-coding genes in the genome. About 20% of the predicted proteins have significant homology to proteins in eukaryotic genomes for which the complete sequence is available, pointing to important conserved cellular functions among eukaryotes.



        

Title: Sequence and analysis of chromosome 1 of the plant Arabidopsis thaliana
Theologis A, Ecker JR, Palm CJ, Federspiel NA, Kaul S, White O, Alonso J, Altafi H, Araujo R and Davis RW <79 more author(s)> Theologis A, Ecker JR, Palm CJ, Federspiel NA, Kaul S, White O, Alonso J, Altafi H, Araujo R, Bowman CL, Brooks SY, Buehler E, Chan A, Chao Q, Chen H, Cheuk RF, Chin CW, Chung MK, Conn L, Conway AB, Conway AR, Creasy TH, Dewar K, Dunn P, Etgu P, Feldblyum TV, Feng J, Fong B, Fujii CY, Gill JE, Goldsmith AD, Haas B, Hansen NF, Hughes B, Huizar L, Hunter JL, Jenkins J, Johnson-Hopson C, Khan S, Khaykin E, Kim CJ, Koo HL, Kremenetskaia I, Kurtz DB, Kwan A, Lam B, Langin-Hooper S, Lee A, Lee JM, Lenz CA, Li JH, Li Y, Lin X, Liu SX, Liu ZA, Luros JS, Maiti R, Marziali A, Militscher J, Miranda M, Nguyen M, Nierman WC, Osborne BI, Pai G, Peterson J, Pham PK, Rizzo M, Rooney T, Rowley D, Sakano H, Salzberg SL, Schwartz JR, Shinn P, Southwick AM, Sun H, Tallon LJ, Tambunga G, Toriumi MJ, Town CD, Utterback T, Van Aken S, Vaysberg M, Vysotskaia VS, Walker M, Wu D, Yu G, Fraser CM, Venter JC, Davis RW (- 79)
Ref: Nature, 408:816, 2000 : PubMed
Abstract


ESTHER: Theologis_2000_Nature_408_816
PubMedSearch: Theologis 2000 Nature 408 816
PubMedID: 11130712
Gene_locus related to this paper: arath-At1g05790, arath-At1g09280, arath-At1g09980, arath-AT1G29120, arath-AT1G52695, arath-AT1G66900, arath-At1g73750, arath-AT1G73920, arath-AT1G74640, arath-AT1G76140, arath-AT1G78210, arath-clh1, arath-F1O17.3, arath-F1O17.4, arath-F1O17.5, arath-F5I6.3, arath-At1g52700, arath-F6D8.27, arath-F6D8.32, arath-F9L1.44, arath-F9P14.11, arath-F12A4.4, arath-MES11, arath-F14G24.2, arath-F14G24.3, arath-F14I3.4, arath-F14O10.2, arath-F16N3.25, arath-LCAT2, arath-At1g34340, arath-MES15, arath-CXE6, arath-ICML1, arath-At1g72620, arath-LCAT1, arath-PLA12, arath-PLA15, arath-PLA17, arath-Q8L7S1, arath-At1g15070, arath-SCP2, arath-SCP4, arath-SCP5, arath-SCP18, arath-SCP32, arath-SCP44, arath-SCP45, arath-SCPL6, arath-F4IE65, arath-At1g30370, arath-T6L1.8, arath-T6L1.20, arath-T14P4.6, arath-MES14, arath-SCP3, arath-AXR4, arath-At1g10040, arath-ZW18, arath-pae2, arath-pae1, arath-a0a1p8awg3

Abstract

The genome of the flowering plant Arabidopsis thaliana has five chromosomes. Here we report the sequence of the largest, chromosome 1, in two contigs of around 14.2 and 14.6 megabases. The contigs extend from the telomeres to the centromeric borders, regions rich in transposons, retrotransposons and repetitive elements such as the 180-base-pair repeat. The chromosome represents 25% of the genome and contains about 6,850 open reading frames, 236 transfer RNAs (tRNAs) and 12 small nuclear RNAs. There are two clusters of tRNA genes at different places on the chromosome. One consists of 27 tRNA(Pro) genes and the other contains 27 tandem repeats of tRNA(Tyr)-tRNA(Tyr)-tRNA(Ser) genes. Chromosome 1 contains about 300 gene families with clustered duplications. There are also many repeat elements, representing 8% of the sequence.



        

Title: Sequence and analysis of chromosome 2 of the plant Arabidopsis thaliana
Lin X, Kaul S, Rounsley S, Shea TP, Benito MI, Town CD, Fujii CY, Mason T, Bowman CL and Venter JC <27 more author(s)> Lin X, Kaul S, Rounsley S, Shea TP, Benito MI, Town CD, Fujii CY, Mason T, Bowman CL, Barnstead M, Feldblyum TV, Buell CR, Ketchum KA, Lee J, Ronning CM, Koo HL, Moffat KS, Cronin LA, Shen M, Pai G, Van Aken S, Umayam L, Tallon LJ, Gill JE, Adams MD, Carrera AJ, Creasy TH, Goodman HM, Somerville CR, Copenhaver GP, Preuss D, Nierman WC, White O, Eisen JA, Salzberg SL, Fraser CM, Venter JC (- 27)
Ref: Nature, 402:761, 1999 : PubMed
Abstract


ESTHER: Lin_1999_Nature_402_761
PubMedSearch: Lin 1999 Nature 402 761
PubMedID: 10617197
Gene_locus related to this paper: arath-At2g45610, arath-AT2G03550, arath-AT2G05260, arath-AT2G12480, arath-At2g15230, arath-At2g18360, arath-At2g19550, arath-At2g19620, arath-At2g24280, arath-AT2G24320, arath-At2g26740, arath-At2g26750, arath-SCP51, arath-AT2G36290, arath-At2g42450, arath-AT2G42690, arath-AT2G44970, arath-At2g47630, arath-AT3g62590, arath-CGEP, arath-F12L6.6, arath-F12L6.7, arath-F12L6.8, arath-At3g50790, arath-MES6, arath-MES7, arath-MES4, arath-MES8, arath-MES2, arath-MES3, arath-MES1, arath-o80731, arath-pip, arath-PLA11, arath-PLA13, arath-PLA16, arath-PLA19, arath-q84w08, arath-SCP8, arath-SCP9, arath-SCP10, arath-SCP11, arath-SCP12, arath-SCP13, arath-SCP23, arath-SCP26, arath-SCP28, arath-SCP46, arath-T26B15.8, arath-SCP22, arath-SFGH, arath-MES19

Abstract

Arabidopsis thaliana (Arabidopsis) is unique among plant model organisms in having a small genome (130-140 Mb), excellent physical and genetic maps, and little repetitive DNA. Here we report the sequence of chromosome 2 from the Columbia ecotype in two gap-free assemblies (contigs) of 3.6 and 16 megabases (Mb). The latter represents the longest published stretch of uninterrupted DNA sequence assembled from any organism to date. Chromosome 2 represents 15% of the genome and encodes 4,037 genes, 49% of which have no predicted function. Roughly 250 tandem gene duplications were found in addition to large-scale duplications of about 0.5 and 4.5 Mb between chromosomes 2 and 1 and between chromosomes 2 and 4, respectively. Sequencing of nearly 2 Mb within the genetically defined centromere revealed a low density of recognizable genes, and a high density and diverse range of vestigial and presumably inactive mobile elements. More unexpected is what appears to be a recent insertion of a continuous stretch of 75% of the mitochondrial genome into chromosome 2.