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https://www.readbyqxmd.com/read/28078722/ssb-and-the-recg-dna-helicase-an-intimate-association-to-rescue-a-stalled-replication-fork
#1
REVIEW
Piero R Bianco, Yuri L Lyubchenko
In E. coli, the regression of stalled DNA replication forks is catalyzed by the DNA helicase RecG. One means of gaining access to the fork is by binding to the single strand binding protein or SSB. This interaction occurs via the wedge domain of RecG and the intrinsically disordered linker (IDL) of SSB, in a manner similar to that of SH3 domains binding to PXXP motif-containing ligands in eukaryotic cells. During loading, SSB remodels the wedge domain so that the helicase domains bind to the parental, duplex DNA, permitting the helicase to translocate using thermal energy...
January 12, 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/28078720/the-intrinsically-disordered-linker-of-e-coli-ssb-is-critical-for-the-release-from-single-stranded-dna
#2
Hui Yin Tan, Luke A Wilczek, Sasheen Pottinger, Maria Manosas, Cong Yu, Trong Nguyenduc, Piero R Bianco
The Escherichia coli single stranded DNA binding protein (SSB) is crucial for DNA replication, recombination and repair. Within each process, it has two seemingly disparate roles: it stabilizes single-stranded DNA (ssDNA) intermediates generated during DNA processing and, forms complexes with a group of proteins known as the SSB-interactome. Key to both roles is the C-terminal, one-third of the protein, in particular the intrinsically disordered linker (IDL). Previously, we have shown using a series of linker deletion mutants that the IDL links both ssDNA and target protein binding by mediating interactions with the oligosaccharide/oligonucleotide binding fold in the target...
January 12, 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/28076899/genome-wide-association-analysis-reveals-genetic-heterogeneity-of-sj%C3%A3-gren-s-syndrome-according-to-ancestry
#3
Kimberly E Taylor, Quenna Wong, David M Levine, Caitlin McHugh, Cathy Laurie, Kimberly Doheny, Mi Y Lam, Alan N Baer, Stephen Challacombe, Hector Lanfranchi, Morten Schiødt, M Srinivasan, Hisanori Umehara, Frederick B Vivino, Yan Zhao, Stephen Shiboski, Troy E Daniels, John S Greenspan, Caroline H Shiboski, Lindsey A Criswell
OBJECTIVE: Sjögren's Syndrome (SS) is a systemic autoimmune disease affecting primarily the lacrimal and salivary glands. The Sjögren's International Collaborative Clinical Alliance (SICCA) is an international multisite observational study whose participants have been genotyped on the Omni 2.5M platform and undergone deep phenotyping using common protocol-directed methods, providing a unique opportunity to examine the genetic etiology of SS across ancestry and disease subsets. METHODS: We perform GWAS analyses utilizing dbGaP controls on all subjects (1405 cases, 1622 SICCA controls, 3125 external controls), European (similarly 585, 966, 2580), and Asian (similarly 460, 224, 901) with ancestry adjustments via principal component analyses...
January 11, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28074617/soft-drink-intake-and-the-risk-of-metabolic-syndrome-a%C3%A2-systematic-review-and-meta-analysis
#4
REVIEW
Aditya Narain, Chun Shing Kwok, Mamas A Mamas
BACKGROUND: It is unclear whether consumption of sugar- or artificially sweetened beverages is independently associated with the development of metabolic syndrome. A systematic review and meta-analysis was performed to evaluate whether soft drink consumption is associated with the development of metabolic syndrome. METHODS: Medline and EMBASE were searched in November 2015 for studies which considered soft drink (sugar-sweetened beverage [SSB] and artificially sweetened beverage [ASB]) intake and risk of metabolic syndrome...
January 10, 2017: International Journal of Clinical Practice
https://www.readbyqxmd.com/read/28074284/high-affinity-rna-binding-by-a-hyperthermophilic-single-stranded-dna-binding-protein
#5
Michael J Morten, Roland Gamsjaeger, Liza Cubeddu, Ruvini Kariawasam, Jose Peregrina, J Carlos Penedo, Malcolm F White
Single-stranded DNA-binding proteins (SSBs), including replication protein A (RPA) in eukaryotes, play a central role in DNA replication, recombination, and repair. SSBs utilise an oligonucleotide/oligosaccharide-binding (OB) fold domain to bind DNA, and typically oligomerise in solution to bring multiple OB fold domains together in the functional SSB. SSBs from hyperthermophilic crenarchaea, such as Sulfolobus solfataricus, have an unusual structure with a single OB fold coupled to a flexible C-terminal tail...
January 10, 2017: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/28073617/district-policies-and-practices-vary-in-their-association-with-adolescents-consumption-of-milk-and-100-fruit-juice
#6
Sarah A Sliwa, Gabrielle F Miller, Nancy D Brener, Sohyun Park, Caitlin L Merlo
PURPOSE: Researchers previously examined the relationship between school beverage policies and sugar-sweetened beverage (SSB) consumption. This study addressed a research gap by examining cross-sectional associations between district-level policies and practices and U.S. high school students' consumption of milk and 100% fruit juice. METHODS: Data from the 2012 School Health Policies and Practices Study and 2013 Youth Risk Behavior Surveillance System were linked for 12 large urban school districts...
January 7, 2017: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/28070314/calories-and-sugars-in-boba-milk-tea-implications-for-obesity-risk-in-asian-pacific-islanders
#7
Jae Eun Min, David B Green, Loan Kim
In the last several decades, obesity rates have reached epidemic proportions, and increases the risk for a host of comorbidities, including diabetes, cardiovascular disease, and certain kinds of cancers. Boba milk tea, first became popular in the 1990s throughout Asia, and has gained more popularity in the United States and in Europe since 2000. Currently, available nutrition data from online sites suggest this beverage contains high amounts of sugar and fat. One published nutrition study suggests that boba tea drinks are part of the larger group of sugar-sweetened beverages (SSB) because these beverages are usually sweetened with high-fructose corn syrup (HFCS)...
January 2017: Food Science & Nutrition
https://www.readbyqxmd.com/read/28067917/structural-insights-into-a-unique-hsp70-hsp40-interaction-in-the-eukaryotic-ribosome-associated-complex
#8
Felix Alexander Weyer, Andrea Gumiero, Genís Valentín Gesé, Karine Lapouge, Irmgard Sinning
Cotranslational chaperones assist de novo folding of nascent polypeptides, prevent them from aggregating and modulate translation. The ribosome-associated complex (RAC) is unique in that the Hsp40 protein Zuo1 and the atypical Hsp70 chaperone Ssz1 form a stable heterodimer, which acts as a cochaperone for the Hsp70 chaperone Ssb. Here we present the structure of the Chaetomium thermophilum RAC core comprising Ssz1 and the Zuo1 N terminus. We show how the conserved allostery of Hsp70 proteins is abolished and this Hsp70-Hsp40 pair is molded into a functional unit...
January 9, 2017: Nature Structural & Molecular Biology
https://www.readbyqxmd.com/read/28059401/single-sideband-photonic-microwave-generation-with-an-optically-injected-quantum-dot-semiconductor-laser
#9
Chih-Ying Chen, Chih-Hao Cheng, Fan-Yi Lin
We studied single-sideband (SSB) photonic microwave generation with a high sideband rejection ratio (SRR) based on the period-one dynamical states of an optically injected quantum-dot (QD) semiconductor laser and demonstrated that the SSB signals have SRRs of approximately 15 dB higher than those generated with a conventional quantum-well semiconductor laser under conditions of optimal microwave power. The enhancement of SRR in the QD laser, which is important in mitigating the power penalty effect in applications such as radio-over-fiber optical communications, could be primarily attributed to a lower carrier decay rate in the dots, smaller linewidth enhancement factor, and reduced photon decay rate...
December 26, 2016: Optics Express
https://www.readbyqxmd.com/read/28057714/elevated-il-37-il-18-and-il-18bp-serum-concentrations-in-patients-with-primary-sj%C3%A3-gren-s-syndrome
#10
Wang Liuqing, Xia Liping, Shen Hui, Lu Jing
The objectives of this study were to examine the serum levels of interleukin (IL)-37 and its clinical association in patients with primary Sjögren's syndrome (pSS) and to investigate whether or not IL-37 participates in the regulation of the pathogenesis of pSS. ELISA was used to analyse the serum levels of IL-37, total IL-18 and IL-18 binding protein (IL-18BP). The level of free IL-18 was calculated based on the mass action law. The correlations between the IL-37 serum levels with the laboratory values and the total IL-18 and IL-18BP serum levels were analyzed by a Spearman's correlation test...
January 5, 2017: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/28054514/relative-biological-effectiveness-for-photons-implication-of-complex-dna-double-strand-breaks-as-critical-lesions
#11
Ying Liang, Qibin Fu, Xudong Wang, Feng Liu, Gen Yang, Chunxiong Luo, Ouyang Qi, Yugang Wang
Current knowledge in radiobiology ascribes the adverse biological effects of ionizing radiation primarily to the induction of DNA double-strand breaks (DSB), which is supposed to be potentially lethal and may be converted to lethal damage due to misrepair. Soft and ultrasoft x-rays have been found to bear elevated biological effectiveness for cell killing compared with conventional x-rays or 60Co γ-rays. This phenomenon is qualitatively interpreted as the increased level of DSB induction for low energy photons however a thorough quantitative reasoning is lacking...
January 5, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28051234/neonatal-lupus-erythematosus-with-congenital-heart-block-in-twins
#12
Lamia Gargouri, Faiza Safi, Bayen Maalej, Souad Mallek, Fatma Turki, Imen Majdoub, Malek Akrout, Dorra Abid, Samir Kamoun, Abdelmajid Mahfoudh
Background - Neonatal lupus erythematosus is an uncommon acquired autoimmune disease caused by transplacental passage of maternal antibodies SSA/Ro, SSB/La or U1 ribonucleoproteins. The most common clinical manifestations are skin rash, cardiac lesions, thrombocytopenia, anemia and hepatosplenomegaly. Complete congenital heart block is usually irreversible needing a pacemaker implantation in two-thirds of cases. Cases report - We report neonatal lupus erythematosus with complete congenital heart block in twins...
July 2016: La Tunisie Médicale
https://www.readbyqxmd.com/read/28049394/coexistence-of-amyloidosis-and-primary-sj%C3%A3-gren-s-syndrome-an-overview-amyloidosis-and-sj%C3%A3-gren-s-syndrome
#13
Gabriela Hernandez-Molina, David Faz-Muñoz, Miguel Astudillo-Angel, Alejandra Iturralde-Chávez, Edgardo Reyes
BACKGROUND: The association of primary Sjögren´s syndrome (SS) and amyloidosis has been recognized but scarcely assessed. OBJECTIVE: Herein we analyzed the literature regarding this association in order to describe a SS phenotype prone to both conditions. METHODS: PubMed and CINAHL databases were searched from inception until April 2016 for the key words: amyloidosis, amyloid, Sjögren's syndrome and their combinations. RESULTS: Most of the cases corresponded to localized amyloidosis mainly at skin and lung, whereas only three cases were systemic...
January 3, 2017: Current Rheumatology Reviews
https://www.readbyqxmd.com/read/28045263/single-and-double-strand-breaks-of-dry-dna-exposed-to-protons-at-the-bragg-peak-energies
#14
Mounir Souici, Talat Tariq Khalil, Dominique Muller, Quentin Raffy, Rémi Barillon, Abdelfettah Belafrites, Christophe Champion, Michel Fromm
Ultra-thin layers (<20 nm) of pBR322 plasmid DNA were deposited onto 2.5 µm thick polyester films and exposed to proton Bragg-peak energies (90-3000 keV) at various fluences. A quantitative analysis of the DNA damage radio-induction is here reported in terms of single and double strand breaks (SSB and DSB, respectively). The corresponding yields as well as G-values and the cross sections exhibit a fairly good agreement with the rare available data stemming from close experimental conditions; namely based on alpha particles irradiations...
January 3, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28044269/under-five-child-mortality-and-morbidity-associated-with-consanguineous-child-marriage-in-pakistan-retrospective-analysis-using-pakistan-demographic-and-health-surveys-1990-91-2006-07-2012-13
#15
Mudasir Mustafa, Rubeena Zakar, Muhammad Zakria Zakar, Ashraf Chaudhry, Muazzam Nasrullah
Objective To assess the combined effect of consanguineous and child marriages (CCM) on children health, which has not previously been explored, either globally or locally. Methods We analyzed secondary data from a series of cross-sectional, nationally representative Pakistan Demographic and Health Surveys 1990-91, 2006-07, and 2012-13. A total of 5406 mothers with 10,164 children were included in the analysis. Child health was assessed by variables such as history of diarrhea, acute respiratory infection (ARI), ARI with fever, Under-5 child mortality (U5CM) and small-size birth (SSB)...
January 2, 2017: Maternal and Child Health Journal
https://www.readbyqxmd.com/read/28043501/comparative-proteomic-analysis-of-sequential-isolates-of-mycobacterium-tuberculosis-sensitive-and-resistant-beijing-type-from-a-patient-with-pulmonary-tuberculosis
#16
Amit Singh, Anil Kumar Gupta, Krishnamoorthy Gopinath, Divakar Sharma, Prashant Sharma, Deepa Bisht, Pawan Sharma, Sarman Singh
AIM & OBJECTIVE: In India, tuberculosis (TB) is a foremost health problem, and the emergence of multidrug-resistant (MDR) and extensively drug resistant (XDR) strains of Mycobacterium tuberculosis (M. tuberculosis) has further complicated the situation. Although various mechanisms have been proposed to elucidate the emergence of resistance, our knowledge remains insufficient. The formation of a very complex network and drugs of proteins are countered by their efflux/modification or target over-expression/modification...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28041944/large-scale-identification-of-differentially-expressed-genes-during-pupa-development-reveals-solute-carrier-gene-is-essential-for-pupal-pigmentation-in-chilo-suppressalis
#17
Yang Sun, Shuijin Huang, Shuping Wang, Dianhao Guo, Chang Ge, Huamei Xiao, Wencai Jie, Qiupu Yang, Xiaolu Teng, Fei Li
Insects undergo metamorphosis, involving an abrupt change in body structure through cell growth and differentiation. Rice stem stripped borer (SSB), Chilo suppressalis, is one of the most destructive rice pests. However, little is known about the regulation mechanism of metamorphosis development in this notorious insect pest. Here, we studied the expression of 22,197 SSB genes at seven time points during pupa development with a customized microarray, identifying 622 differentially expressed genes (DEG) during pupa development...
December 29, 2016: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28025538/the-impact-of-health-literacy-status-on-the-comparative-validity-and-sensitivity-of-an-interactive-multimedia-beverage-intake-questionnaire
#18
Lucy P Hooper, Emily A Myers, Jamie M Zoellner, Brenda M Davy, Valisa E Hedrick
Self-reported dietary assessment methods can be challenging to validate, and reporting errors for those with lower health literacy (HL) may be augmented. Interactive multimedia (IMM) based questionnaires could help overcome these limitations. The objectives of this investigation are to assess the comparative validity and sensitivity to change of an IMM beverage intake questionnaire (IMM-BEVQ) as compared to dietary recalls and determine the impact of HL. Adults completed three 24-h dietary recalls and the IMM-BEVQ at baseline and after a six-month intervention targeting either sugar-sweetened beverages (SSB) or physical activity...
December 23, 2016: Nutrients
https://www.readbyqxmd.com/read/28000228/differential-regulation-of-ssb-genes-in-the-nitrogen-fixing-cyanobacterium-anabaena-sp-strain-pcc7120
#19
Anurag Kirti, Arvind Kumar, Hema Rajaram
Anabaena sp. PCC7120 possesses three genes coding for single-stranded DNA-binding (SSB) protein, of which ssb1 was a single gene, and ssb2 and ssb3, the first gene of their corresponding operons. Regulation of the truncated ssb genes, ssb1 (alr0088) and ssb2 (alr7559) were unaffected by N-status of growth. They were negatively regulated by the SOS-response regulatory protein LexA, as indicated by the (i) binding of Anabaena LexA to the LexA-box of regulatory regions of ssb1 and ssb2, and (ii) decreased expression of the downstream gfp reporter gene in E...
December 21, 2016: Journal of Phycology
https://www.readbyqxmd.com/read/27999339/association-between-plain-water-and-sugar-sweetened-beverages-and-total-energy-intake-among-mexican-school-age-children
#20
Teresa Shamah-Levy, Claudia Gabriela García-Chávez, Sonia Rodríguez-Ramírez
Water consumption promotes a decrease in total diet energy intake, and one explanation for this fact is the replacement of sugar-sweetened beverages (SSBs) by plain water (PW). The objective of this study was to analyze the association between SSB and PW consumption as a part of the total energy intake. Dietary information was obtained by one 24 h recall of 2536 school-age children who participated in the National Nutrition Survey in Mexico. PW and SSB consumption was measured in mL and servings (240 mL), and consumption was stratified into two levels (<2 and ≥2 servings/day)...
December 18, 2016: Nutrients
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