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Functional & Integrative Genomics

Lorenzo Giusti, Erica Mica, Edoardo Bertolini, Anna Maria De Leonardis, Primetta Faccioli, Luigi Cattivelli, Cristina Crosatti
Plant stress response is a complex molecular process based on transcriptional and posttranscriptional regulation of many stress-related genes. microRNAs are the best-studied class of small RNAs known to play key regulatory roles in plant response to stress, besides being involved in plant development and organogenesis. We analyzed the leaf miRNAome of two durum wheat cultivars (Cappelli and Ofanto) characterized by a contrasting water use efficiency, exposed to heat stress, and mild and severe drought stress...
October 12, 2016: Functional & Integrative Genomics
Jannatul Ferdous, Ryan Whitford, Martin Nguyen, Chris Brien, Peter Langridge, Penny J Tricker
Drought is one of the major abiotic stresses reducing crop yield. Since the discovery of plant microRNAs (miRNAs), considerable progress has been made in clarifying their role in plant responses to abiotic stresses, including drought. miR827 was previously reported to confer drought tolerance in transgenic Arabidopsis. We examined barley (Hordeum vulgare L. 'Golden Promise') plants over-expressing miR827 for plant performance under drought. Transgenic plants constitutively expressing CaMV-35S::Ath-miR827 and drought-inducible Zm-Rab17::Hv-miR827 were phenotyped by non-destructive imaging for growth and whole plant water use efficiency (WUEwp)...
October 11, 2016: Functional & Integrative Genomics
Rucha Harishbhai Mehta, Manivel Ponnuchamy, Jitendra Kumar, Nagaraja Reddy Rama Reddy
De novo assembly of reads produced by next-generation sequencing (NGS) technologies offers a rapid approach to obtain expressed gene sequences for non-model organisms. Senna (Cassia angustifolia Vahl.) is a drought-tolerant annual undershrub of Caesalpiniaceae, a subfamily of Fabaceae. There are insufficient transcriptomic and genomic data in public databases for understanding the molecular mechanism underlying the drought tolerance of senna. Therefore, the main purpose of this study was to know the transcriptome profile of senna, with special reference to drought stress...
October 5, 2016: Functional & Integrative Genomics
Martyna Bieniek-Kobuszewska, Grzegorz Panasiewicz, Aleksandra Lipka, Marta Majewska, Bozena Szafranska
This is a pioneer study of single nucleotide polymorphisms (SNPs) within the entire promoter region (1204 bp) of the dominant pPAG2-L subfamily in the pig. The pPAG2-L subfamily was sequenced/examined using genomic deoxyribonucleic acid (gDNA) templates of crossbreed pigs (Landrace x Large White), and compared to two bacterial artificial chromosome (BAC) clones containing gDNA of the Duroc breed (as the positive controls). Our analysis of the pPAG2-L promoter identified 31 SNPs and one InDel mutation in crossbreed pigs...
October 5, 2016: Functional & Integrative Genomics
Jun Fan, Cui Zhang, Qi Chen, Jin Zhou, Jean-Louis Franc, Qing Chen, Yunguang Tong
Isolated hormone deficiency might be caused by loss of a specific type of endocrine cells, and regenerating these missing cells may provide a new option for future treatment. It is known that POU1F1 lineage cells can differentiate into thyrotroph, somatotroph, and lactotroph. However, there is no effective way of controlling pituitary stem/progenitor cells to differentiate into a specific type of endocrine cell. We thereby analyzed multiple genomic publications related to POU1F1 and pituitary development in this study to identify genes and agents regulating POU1F1 lineage cell differentiation...
October 5, 2016: Functional & Integrative Genomics
Fanggui Zhao, Chen Wang, Jian Han, Xudong Zhu, Xiaopeng Li, Xicheng Wang, Jinggui Fang
MicroRNAs (miRNAs) are critical regulators of various biological and metabolic processes of plants. Numerous miRNAs and their functions have been identified and analyzed in many plants. However, till now, the involvement of miRNAs in the response of grapevine berries to ethylene has not been reported yet. Here, Solexa technology was employed to deeply sequence small RNA libraries constructed from grapevine berries treated with and without ethylene. A total of 124 known and 78 novel miRNAs were identified. Among these miRNAs, 162 miRNAs were clearly responsive to ethylene, with 55 downregulated, 59 upregulated, and 14 unchanged miRNAs detected only in the control...
September 30, 2016: Functional & Integrative Genomics
Emre Deniz, Batu Erman
Long intergenic non-coding RNAs (lincRNAs) are defined as RNA transcripts that are longer than 200 nucleotides. By definition, these RNAs must not have open reading frames that encode proteins. Many of these transcripts are encoded by RNA polymerase II, are spliced, and are poly-adenylated. This final fact indicates that there is a trove of information about lincRNAs in databases such as the Gene Expression Omnibus (GEO), which is a repository for RNAseq and microarray data. Recent experiments indicate that there are upwards of 15,000 lincRNAs encoded by the human genome...
September 28, 2016: Functional & Integrative Genomics
Burcu Alptekin, Peter Langridge, Hikmet Budak
The continued growth in world population necessitates increases in both the quantity and quality of agricultural production. Triticeae members, particularly wheat and barley, make an important contribution to world food reserves by providing rich sources of carbohydrate and protein. These crops are grown over diverse production environments that are characterized by a range of environmental or abiotic stresses. Abiotic stresses such as drought, heat, salinity, or nutrient deficiencies and toxicities cause large yield losses resulting in economic and environmental damage...
September 24, 2016: Functional & Integrative Genomics
Chunming Gu, Tianfu Li, Zhao Yin, Shengting Chen, Jia Fei, Jianping Shen, Yuan Zhang
Berberine (BBR), a traditional Chinese herbal medicine compound, has emerged as a novel class of anti-tumor agent. Our previous microRNA (miRNA) microarray demonstrated that miR-106b/25 was significantly down-regulated in BBR-treated multiple myeloma (MM) cells. Here, systematic integration showed that miR-106b/25 cluster is involved in multiple cancer-related signaling pathways and tumorigenesis. MiREnvironment database revealed that multiple environmental factors (drug, ionizing radiation, hypoxia) affected the miR-106b/25 cluster expression...
September 19, 2016: Functional & Integrative Genomics
Ismael Soltani, Hanen Gharbi, Islem Ben Hassine, Ghada Bouguerra, Kais Douzi, Mouheb Teber, Salem Abbes, Samia Menif
Targeted therapy in the form of selective breakpoint cluster region-abelson (BCR/ABL) tyrosine kinase inhibitor (imatinib mesylate) has successfully been introduced in the treatment of the chronic myeloid leukemia (CML). However, acquired resistance against imatinib mesylate (IM) has been reported in nearly half of patients and has been recognized as major issue in clinical practice. Multiple resistance genes and microRNAs (miRNAs) are thought to be involved in the IM resistance process. These resistance genes and miRNAs tend to interact with each other through a regulatory network...
September 16, 2016: Functional & Integrative Genomics
Laura Medina-Puche, Rosario Blanco-Portales, Francisco Javier Molina-Hidalgo, Guadalupe Cumplido-Laso, Nicolás García-Caparrós, Enriqueta Moyano-Cañete, José Luis Caballero-Repullo, Juan Muñoz-Blanco, Antonio Rodríguez-Franco
Strawberry is an ideal model for studying the molecular biology of the development and ripening of non-climacteric fruits. Hormonal regulation of gene expression along all these processes in strawberries is still to be fully elucidated. Although auxins and ABA have been pointed out as the major regulatory hormones, few high-throughput analyses have been carried out to date. The role for ethylene and gibberellins as regulatory hormones during the development and ripening of the strawberry fruit remain still elusive...
September 10, 2016: Functional & Integrative Genomics
Mehmet Tardu, Ugur Meric Dikbas, Ibrahim Baris, Ibrahim Halil Kavakli
Light is one of the main environmental cues that affects the physiology and behavior of many organisms. The effect of light on genome-wide transcriptional regulation has been well-studied in green algae and plants, but not in red algae. Cyanidioschyzon merolae is used as a model red algae, and is suitable for studies on transcriptomics because of its compact genome with a relatively small number of genes. In addition, complete genome sequences of the nucleus, mitochondrion, and chloroplast of this organism have been determined...
September 10, 2016: Functional & Integrative Genomics
Ying Liang, Youjian Yu, Jinlong Cui, Meiling Lyu, Liai Xu, Jiashu Cao
Cell walls are a distinguishing characteristic of plants essential to their survival. The pectin content of primary cell walls in grasses and dicots is distinctly different. Polygalacturonases (PGs) can degrade pectins and participate in multiple developmental processes of plants. This study comprehensively compared the evolution, expression, and cis-regulatory element of PGs in grasses and dicots. A total of 577 PGs identified from five grasses and five dicots fell into seven clades. Evolutionary analysis demonstrated the distinct differences between grasses and dicots in patterns of gene duplication and loss, and evolutionary rates...
September 8, 2016: Functional & Integrative Genomics
Bhusan Gurung, Pardeep K Bhardwaj, Narayan C Talukdar
In the present study, suppression subtractive hybridization (SSH) strategy was used to identify rare and differentially expressed transcripts in leaf and rhizome tissues of Panax sokpayensis. Out of 1102 randomly picked clones, 513 and 374 high quality expressed sequenced tags (ESTs) were generated from leaf and rhizome subtractive libraries, respectively. Out of them, 64.92 % ESTs from leaf and 69.26 % ESTs from rhizome SSH libraries were assembled into different functional categories, while others were of unknown function...
September 1, 2016: Functional & Integrative Genomics
SongTao Jiu, Chen Wang, Ting Zheng, Zhongjie Liu, XiangPeng Leng, Tariq Pervaiz, Abolfazl Lotfi, JingGui Fang, XiaoMin Wang
A 2000-bp 5'-flanking region of VvPAL-like was isolated from 'Summer Black' grapevine by PCR amplification, named pVvPAL-like. To gain a better understanding of the expression and regulatory mechanism of VvPAL-like, a chimeric expression unit consisting of the β-glucuronidase (GUS) reporter gene under the control of a 2000-bp fragment of the VvPAL-like promoter was transformed into tobacco via Agrobacterium tumefaciens. Histochemical staining showed that the full-length promoter directs efficient expression of the reporter gene in cotyledons and hypocotyls, stigma, style, anthers, pollen, ovary, trichomes, and vascular bundles of transgenic plants...
August 25, 2016: Functional & Integrative Genomics
Haipei Liu, Amanda J Able, Jason A Able
MicroRNAs (miRNAs) guide regulation at the post-transcriptional level by inducing messenger RNA (mRNA) degradation or translational inhibition of their target protein-coding genes. Durum wheat miRNAs may contribute to the genotypic water-deficit stress response in different durum varieties. Further investigation of the interactive miRNA-target regulatory modules and experimental validation of their response to water stress will contribute to our understanding of the small RNA-mediated molecular networks underlying stress adaptation in durum wheat...
August 25, 2016: Functional & Integrative Genomics
Rodrigo S Reis
MicroRNAs (miRNAs) are small RNAs (sRNAs) that regulate gene expression in development and adaptive responses to the environment. The early days in the sRNA field was one of the most exciting and promising moments in modern biology, attracting large investments to the understanding of the underlining mechanisms and their applications, such as in gene therapy. miRNAs and other sRNAs have since been extensively studied in animals and plants, and are currently well established as an important part of most gene regulatory processes in animals and as master regulators in plants...
August 22, 2016: Functional & Integrative Genomics
Maria E Faricelli, Miroslav Valárik, Jorge Dubcovsky
No abstract text is available yet for this article.
August 22, 2016: Functional & Integrative Genomics
Ana Clara P Azevedo-Pouly, Dhruvitkumar S Sutaria, Jinmai Jiang, Ola A Elgamal, Foued Amari, David Allard, Paul J Grippo, Vincenzo Coppola, Thomas D Schmittgen
Mice harboring a G12D activating Kras mutation are among the most heavily studied models in the field of pancreatic adenocarcinoma (PDAC) research. miRNAs are differentially expressed in PDAC from patients and mouse models of PDAC. To better understand the relationship that Kras activation has on miRNA expression, we profiled the expression of 629 miRNAs in RNA isolated from the pancreas of control, young, and old P48(+/Cre);LSL-KRAS(G12D) as well as PDX-1-Cre;LSL-KRAS(G12D) mice. One hundred of the differentially expressed miRNAs had increased expression in the advanced disease (old) P48(+/Cre);LSL-KRAS(G12D) compared to wild-type mice...
August 19, 2016: Functional & Integrative Genomics
Shraddha Shaligram, Shreyas V Kumbhare, Dhiraj P Dhotre, Manohar G Muddeshwar, Atya Kapley, Neetha Joseph, Hemant P Purohit, Yogesh S Shouche, Shrikant P Pawar
Genomic studies provide deeper insights into secondary metabolites produced by diverse bacterial communities, residing in various environmental niches. This study aims to understand the potential of a biosurfactant producing Bacillus sp. AM13, isolated from soil. An integrated approach of genomic and chemical analysis was employed to characterize the antibacterial lipopeptide produced by the strain AM13. Genome analysis revealed that strain AM13 harbors a nonribosomal peptide synthetase (NRPS) cluster; highly similar with known biosynthetic gene clusters from surfactin family: lichenysin (85 %) and surfactin (78 %)...
September 2016: Functional & Integrative Genomics
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