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https://www.readbyqxmd.com/read/28622290/structural-basis-for-the-regulatory-interactions-of-proapoptotic-par-4
#1
Udaya K Tiruttani Subhramanyam, Jan Kubicek, Ulf B Eidhoff, Joerg Labahn
Par-4 is a unique proapoptotic protein with the ability to induce apoptosis selectively in cancer cells. The X-ray crystal structure of the C-terminal domain of Par-4 (Par-4CC), which regulates its apoptotic function, was obtained by MAD phasing. Par-4 homodimerizes by forming a parallel coiled-coil structure. The N-terminal half of Par-4CC contains the homodimerization subdomain. This structure includes a nuclear export signal (Par-4NES) sequence, which is masked upon dimerization indicating a potential mechanism for nuclear localization...
June 16, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28586421/fruitfull-controls-saur10-expression-and-regulates-arabidopsis-growth-and-architecture
#2
Marian Bemer, Hilda van Mourik, Jose M Muiño, Cristina Ferrándiz, Kerstin Kaufmann, Gerco C Angenent
MADS-domain transcription factors are well known for their roles in plant development and regulate sets of downstream genes that have been uncovered by high-throughput analyses. A considerable number of these targets are predicted to function in hormone responses or responses to environmental stimuli, suggesting that there is a close link between developmental and environmental regulators of plant growth and development. Here, we show that the Arabidopsis MADS-domain factor FRUITFULL (FUL) executes several functions in addition to its noted role in fruit development...
June 6, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28580920/crystal-structure-of-the-thermoplasma-acidophilum-protein-ta1207
#3
Ganesh Ramnath Pathare, István Nagy, Ágnes Hubert, Dennis R Thomas, Andreas Bracher
The crystal structure of the Ta1207 protein from Thermoplasma acidophilum is reported. Ta1207 was identified in a screen for high-molecular-weight protein complexes in T. acidophilum. In solution, Ta1207 forms homopentamers of 188 kDa. The crystal structure of recombinant Ta1207 solved by Se-MAD at 2.4 Å resolution revealed a complex with fivefold symmetry. In the crystal lattice, calcium ions induce the formation of a nanocage from two pentamers. The Ta1207 protomers comprise two domains with the same novel α/β topology...
June 1, 2017: Acta Crystallographica. Section F, Structural Biology Communications
https://www.readbyqxmd.com/read/28505304/phytoplasma-conserved-phyllogen-proteins-induce-phyllody-across-the-plantae-by-degrading-floral-mads-domain-proteins
#4
Yugo Kitazawa, Nozomu Iwabuchi, Misako Himeno, Momoka Sasano, Hiroaki Koinuma, Takamichi Nijo, Tatsuya Tomomitsu, Tetsuya Yoshida, Yukari Okano, Nobuyuki Yoshikawa, Kensaku Maejima, Kenro Oshima, Shigetou Namba
ABCE-class MADS domain transcription factors (MTFs) are key regulators of floral organ development in angiosperms. Aberrant expression of these genes can result in abnormal floral traits such as phyllody. Phyllogen is a virulence factor conserved in phytoplasmas, plant pathogenic bacteria of the class Mollicutes. It triggers phyllody in Arabidopsis thaliana by inducing degradation of A- and E-class MTFs. However, it is still unknown whether phyllogen can induce phyllody in plants other than A. thaliana, although phytoplasma-associated phyllody symptoms are observed in a broad range of angiosperms...
May 15, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28495617/the-adaptor-protein-ara55-and-the-nuclear-kinase-hipk1-assist-c-myb-in-recruiting-p300-to-chromatin
#5
Mads Bengtsen, Linda Sørensen, Linn Aabel, Marit Ledsaak, Vilborg Matre, Odd Stokke Gabrielsen
LIM-domain proteins, containing multiple cysteine-rich zinc finger-like motifs, have been shown to play diverse roles in several cellular processes. A common theme is that they mediate important protein-protein interactions that are key to their function. Androgen receptor-associated protein 55 (ARA55) belongs to this family of bridging proteins containing four C-terminal LIM domains. It has a dual role with functions both at focal adhesions and in the nucleus, apparently shuttling between the two compartments...
May 8, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28375450/patient-reported-outcome-measures-in-dysphagia-a-systematic-review-of-instrument-development-and-validation
#6
D A Patel, R Sharda, K L Hovis, E E Nichols, N Sathe, D F Penson, I D Feurer, M L McPheeters, M F Vaezi, David O Francis
OBJECTIVE: Patient-reported outcome (PRO) measures are commonly used to capture patient experience with dysphagia and to evaluate treatment effectiveness. Inappropriate application can lead to distorted results in clinical studies. A systematic review of the literature on dysphagia-related PRO measures was performed to (1) identify all currently available measures and (2) to evaluate each for the presence of important measurement properties that would affect their applicability. DESIGN: MEDLINE via the PubMed interface, the Cumulative Index of Nursing and Allied Health Literature, and the Health and Psychosocial Instrument database were searched using relevant vocabulary terms and key terms related to PRO measures and dysphagia...
May 1, 2017: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/28369831/evolutionary-adaptation-to-environmental-stressors-a-common-response-at-the-proteomic-level
#7
Jesper G Sørensen, Mads F Schou, Volker Loeschcke
Mechanistic trade-offs between traits under selection can shape and constrain evolutionary adaptation to environmental stressors. However, our knowledge of the quantitative and qualitative overlap in the molecular machinery among stress tolerance traits is highly restricted by the challenges of comparing and interpreting data between separate studies and laboratories, as well as to extrapolating between different levels of biological organization. We investigated the expression of the constitutive proteome (833 proteins) of 35 Drosophila melanogaster replicate populations artificially selected for increased resistance to six different environmental stressors...
June 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28352968/silencing-slagl6-a-tomato-agamous-like6-lineage-gene-generates-fused-sepal-and-green-petal
#8
Xiaohui Yu, Guoping Chen, Xuhu Guo, Yu Lu, Jianling Zhang, Jingtao Hu, Shibing Tian, Zongli Hu
Silencing SlAGL6 in tomato leads to fused sepal and green petal by influencing the expression of A-, B-class genes. AGAMOUS-LIKE6 (AGL6) lineage is an important clade MADS-box transcription factor and plays essential roles in various developmental programs especially in flower meristem and floral organ development. Here, we isolated a tomato AGL6 lineage gene SlAGL6 and successfully obtained several RNA interference (RNAi) lines. Silencing SlAGL6 led to abnormal fused sepals and light green petals with smaller size...
March 28, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28350172/benchmark-study-of-the-structural-and-thermochemical-properties-of-a-dihydroazulene-vinylheptafulvene-photoswitch
#9
Mads Koerstz, Jonas Elm, Kurt V Mikkelsen
We investigate the performance of four different density functional theory (DFT) functionals (M06-2X, ωB97X-D, PBE0, and B3LYP-D3BJ) for calculating the structural and thermochemical properties of the dihydroazulene/vinylheptafulvene photoswitch (DHA/VHF). We find that all the tested DFT functionals yield equilibrium geometries in good agreement with higher level CCSD/cc-pVDZ calculations and that the basis set had little influence on the geometries of the photoswitch. We found a negligible difference in the thermal contribution to the Gibbs free energy between the tested functionals, indicating that the largest source of error when calculating storage free energies originates from errors in the calculated single point energies...
April 14, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28337996/protein-interaction-evolution-from-promiscuity-to-specificity-with-reduced-flexibility-in-an-increasingly-complex-network
#10
T Alhindi, Z Zhang, P Ruelens, H Coenen, H Degroote, N Iraci, K Geuten
A key question regarding protein evolution is how proteins adapt to the dynamic environment in which they function and how in turn their evolution shapes the protein interaction network. We used extant and resurrected ancestral plant MADS-domain transcription factors to understand how SEPALLATA3, a protein with hub and glue properties, evolved and takes part in network organization. Although the density of dimeric interactions was saturated in the network, many new interactions became mediated by SEPALLATA3 after a whole genome triplication event...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28330566/the-mads-box-gene-slmbp11-regulates-plant-architecture-and-affects-reproductive-development-in-tomato-plants
#11
Xuhu Guo, Guoping Chen, Muhammad Naeem, Xiaohu Yu, Boyan Tang, Anzhou Li, Zongli Hu
MADS-domain proteins are important transcription factors that are involved in many biological processes of plants. In the present study, SlMBP11, a member of the AGL15 subfamily, was cloned in tomato plants (Solanum lycopersicon M.). SlMBP11 is ubiquitously expressed in all of the tissues we examined, whereas the SlMBP11 transcription levels were significantly higher in reproductive tissues than in vegetative tissues. Plants exhibiting increased SlMBP11 levels displayed reduced plant height, leaf size, and internode length as well as a loss of dominance in young seedlings, highly branched growth from each leaf axil, and increased number of nodes and leaves...
May 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28317937/identification-of-cancer-associated-missense-mutations-in-hace1-that-impair-cell-growth-control-and-rac1-ubiquitylation
#12
Emilie Andrio, Romain Lotte, Daniel Hamaoui, Jacqueline Cherfils, Anne Doye, Mads Daugaard, Poul H Sorensen, Frédéric Bost, Raymond Ruimy, Amel Mettouchi, Emmanuel Lemichez
The E3 ubiquitin ligase HACE1 is a potent tumor suppressor that controls cell proliferation and ubiquitylates the small GTPase Rac1 to target it to proteasomal degradation. Whether and how the activity of HACE1 is regulated by the N-terminal ankyrin (ANK) and the middle (MID) domains is ill defined. Here, we identified in the version 64 of the Catalogue of Somatic Mutations in Cancer (COSMIC) 13 missense mutations of hace1 located outside the HECT domain, and found that all lead to defective control of cell proliferation...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28261246/possible-role-of-mads-affecting-flowering-3-and-b-box-domain-protein-19-in-flowering-time-regulation-of-arabidopsis-mutants-with-defects-in-nonsense-mediated-mrna-decay
#13
Zeeshan Nasim, Muhammad Fahim, Ji Hoon Ahn
Eukaryotic cells use nonsense-mediated mRNA decay (NMD) to clear aberrant mRNAs from the cell, thus preventing the accumulation of truncated proteins. In Arabidopsis, two UP-Frameshift (UPF) proteins, UPF1 and UPF3, play a critical role in NMD. Although deficiency of UPF1 and UPF3 leads to various developmental defects, little is known about the mechanism underlying the regulation of flowering time by NMD. Here, we showed that the upf1-5 and upf3-1 mutants had a late-flowering phenotype under long-day conditions and the upf1-5 upf3-1 double mutants had an additive effect in delaying flowering time...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28252035/regulation-of-atypical-map-kinases-erk3-and-erk4-by-the-phosphatase-dusp2
#14
Maria Perander, Rania Al-Mahdi, Thomas C Jensen, Jennifer A L Nunn, Hanne Kildalsen, Bjarne Johansen, Mads Gabrielsen, Stephen M Keyse, Ole-Morten Seternes
The atypical MAP kinases ERK3 and ERK4 are activated by phosphorylation of a serine residue lying within the activation loop signature sequence S-E-G. However, the regulation of ERK3 and ERK4 phosphorylation and activity is poorly understood. Here we report that the inducible nuclear dual-specificity MAP kinase phosphatase (MKP) DUSP2, a known regulator of the ERK and p38 MAPKs, is unique amongst the MKP family in being able to bind to both ERK3 and ERK4. This interaction is mediated by a conserved common docking (CD) domain within the carboxyl-terminal domains of ERK3 and ERK4 and the conserved kinase interaction motif (KIM) located within the non-catalytic amino terminus of DUSP2...
March 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28251165/novel-chemokine-based-immunotoxins-for-potent-and-selective-targeting-of-cytomegalovirus-infected-cells
#15
Katja Spiess, Mads G Jeppesen, Mikkel Malmgaard-Clausen, Karen Krzywkowski, Thomas N Kledal, Mette M Rosenkilde
Immunotoxins as antiviral therapeutics are largely unexplored but have promising prospective due to their high selectivity potential and their unparalleled efficiency. One recent example targeted the virus-encoded G protein-coupled receptor US28 as a strategy for specific and efficient treatment of human cytomegalovirus (HCMV) infections. US28 is expressed on virus-infected cells and scavenge chemokines by rapid internalization. The chemokine-based fusion-toxin protein (FTP) consisted of a variant (F49A) of CX3CL1 specifically targeting US28 linked to the catalytic domain of Pseudomonas exotoxin A (PE)...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28100708/the-origin-of-floral-organ-identity-quartets
#16
Philip Ruelens, Zhicheng Zhang, Hilda van Mourik, Steven Maere, Kerstin Kaufmann, Koen Geuten
The origin of flowers has puzzled plant biologists ever since Darwin referred to their sudden appearance in the fossil record as an abominable mystery. Flowers are considered to be an assembly of protective, attractive, and reproductive male and female leaf-like organs. Their origin cannot be understood by a morphological comparison to gymnosperms, their closest relatives, which develop separate male or female cones. Despite these morphological differences, gymnosperms and angiosperms possess a similar genetic toolbox consisting of phylogenetically related MADS domain proteins...
February 2017: Plant Cell
https://www.readbyqxmd.com/read/28018905/the-mutational-landscape-of-the-oncogenic-mzf1-scan-domain-in-cancer
#17
Mads Nygaard, Thilde Terkelsen, André Vidas Olsen, Valentina Sora, Juan Salamanca Viloria, Fabio Rizza, Sanne Bergstrand-Poulsen, Miriam Di Marco, Mette Vistesen, Matteo Tiberti, Matteo Lambrughi, Marja Jäättelä, Tuula Kallunki, Elena Papaleo
SCAN domains in zinc-finger transcription factors are crucial mediators of protein-protein interactions. Up to 240 SCAN-domain encoding genes have been identified throughout the human genome. These include cancer-related genes, such as the myeloid zinc finger 1 (MZF1), an oncogenic transcription factor involved in the progression of many solid cancers. The mechanisms by which SCAN homo- and heterodimers assemble and how they alter the transcriptional activity of zinc-finger transcription factors in cancer and other diseases remain to be investigated...
2016: Frontiers in Molecular Biosciences
https://www.readbyqxmd.com/read/28007633/the-go-actiwe-randomized-controlled-trial-an-interdisciplinary-study-designed-to-investigate-the-health-effects-of-active-commuting-and-leisure-time-physical-activity
#18
Mads Rosenkilde, Martin Bæk Petersen, Anne Sofie Gram, Jonas Salling Quist, Jonas Winther, Simon Due Kamronn, Desirée Hornbæk Milling, Jakob Eg Larsen, Astrid Pernille Jespersen, Bente Stallknecht
Regular physical activity is efficacious for improving metabolic health in overweight and obese individuals, yet, many adults lead sedentary lives. Most exercise interventions have targeted leisure time, but physical activity also takes place in other domains of everyday life. Active commuting represents a promising alternative to increase physical activity, but it has yet to be established whether active commuting conveys health benefits on par with leisure time physical activity (LTPA). A 6-month randomized controlled trial was designed to investigate the effects of increased physical activity in transport (bicycling) or leisure time domains (moderate or vigorous intensity endurance exercise)...
December 19, 2016: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/27968991/wsa206-a-paralog-of-duplicated-mpf2-like-mads-box-family-is-recruited-in-fertility-function-in-withania
#19
Muhammad Ramzan Khan, Humera Ihsan, Ghulam Muhammad Ali
Best known for their implication in calyx inflation, MPF2-like genes pertinent to the STMADS11 clade of the MADS-box family exert their functions in leaf development, flowering time, inflorescence architecture and floral reversion to just name but a few. However, our knowledge about their involvement in fertility function remained obscure. Therefore the major thrust of this study was to probe the recruitment of WSA206 (MPF2-like) protein in fertility function. The WSA206 functions were revealed by knocking down and overexpressing this protein in Withania somnifera...
December 2016: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/27965680/molecular-cloning-characterization-and-expression-of-misoc1-a-homolog-of-the-flowering-gene-suppressor-of-overexpression-of-constans1-from-mango-mangifera-indica-l
#20
Junya Wei, Debing Liu, Guoyin Liu, Jie Tang, Yeyuan Chen
MADS-box transcription factor plays a crucial role in plant development, especially controlling the formation and development of floral organs. Mango (Mangifera indica L) is an economically important fruit crop, but its molecular control of flowering is largely unknown. To better understand the molecular basis of flowering regulation in mango, we isolated and characterized the MiSOC1, a putative mango orthologs for the Arabidopsis SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1/AGAMOUS-LIKE 20 (SOC1/AGL20) with homology-based cloning and RACE...
2016: Frontiers in Plant Science
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