keyword
MENU ▼
Read by QxMD icon Read
search

PsbP

keyword
https://www.readbyqxmd.com/read/29027293/determination-of-chemical-identity-and-occupancy-from-experimental-density-maps
#1
Jimin Wang
Three basic electronic properties of molecules, electron density (ED), charge density (CD), and electrostatic potentials (ESP), are dependent on both atomic mobility and occupancy of components in the molecules. Small protein subunits may bind large macromolecular complexes with a reduced occupancy or an increased atomic mobility or both due to affinity-based functional regulation, and so may substrates, products, cofactors, ions or solvent molecule to the active sites of enzymes. A quantitative theory is presented in this study that describes the dependence of atomic functions on atomic B-factor in Fourier transforms of the corresponding maps...
October 13, 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/28948506/comparative-analysis-of-arterial-parameters-variations-associated-with-inter-individual-variations-in-peripheral-and-aortic-blood-pressure-cross-sectional-study-in-healthy-subjects-aged-2-84%C3%A2-years
#2
Yanina Zócalo, Santiago Curcio, Victoria García-Espinosa, Pedro Chiesa, Gustavo Giachetto, Daniel Bia
INTRODUCTION: The association between arterial parameters and blood pressure (BP) interindividual variations could depend on the arterial segment, BP component (systolic, SBP; diastolic, DBP; pulse pressure, PP) and/or on whether central (cBP) or peripheral (pBP) BP variations are considered. AIM: To assess and compare arterial parameters variations associated with interindividual variations in cBP and pBP. METHODS: Healthy subjects (n = 923; 488 males, 2-84 years) were included...
December 2017: High Blood Pressure & Cardiovascular Prevention: the Official Journal of the Italian Society of Hypertension
https://www.readbyqxmd.com/read/28895009/effect-of-different-methods-of-ca-2-extraction-from-psii-oxygen-evolving-complex-on-the-qa-oxidation-kinetics
#3
Boris K Semin, Lira N Davletshina, Mahir D Mamedov
Lumenal extrinsic proteins PsbO, PsbP, and PsbQ of photosystem II (PSII) protect the catalytic cluster Mn4CaO5 of oxygen-evolving complex (OEC) from the bulk solution and from soluble compounds in the surrounding medium. Extraction of PsbP and PsbQ proteins by NaCl-washing together with chelator EGTA is followed also by the depletion of Ca(2+) cation from OEC. In this study, the effects of PsbP and PsbQ proteins, as well as Ca(2+) extraction from OEC on the kinetics of the reduced primary electron acceptor (QA(-)) oxidation, have been studied by fluorescence decay kinetics measurements in PSII membrane fragments...
September 11, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28870843/phosphatidylserine-a-cancer-cell-targeting-biomarker
#4
REVIEW
Bhupender Sharma, Shamsher S Kanwar
Cancer is a leading cause of mortality and morbidity globally. Many prominent cancer-associated molecules have been identified over the recent years which include EGFR, CD44, TGFbRII, HER2, miR-497, NMP22, BTA, Fibrin/FDP etc. These biomarkers are often used for screening, detection, diagnosis, prognosis, prediction and monitoring of cancer development. Phosphatidylserine (PS) is an essential component in all human cells which is present on the inner leaflet of the cell membrane. The oxidative stress causes exposure of PS on the surface of the vascular endothelium in the cancer cells (lung, breast, pancreatic, bladder, skin, brain metastasis, rectal adenocarcinoma etc...
September 1, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/28798769/molecular-basis-underlying-leaf-variegation-of-a-moth-orchid-mutant-phalaenopsis-aphrodite-subsp-formosana
#5
Chi-Chu Tsai, Yu-Jen Wu, Chiou-Rong Sheue, Pei-Chun Liao, Ying-Hao Chen, Shu-Ju Li, Jian-Wei Liu, Han-Tsung Chang, Wen-Lin Liu, Ya-Zhu Ko, Yu-Chung Chiang
Leaf variegation is often the focus of plant breeding. Here, we studied a variegated mutant of Phalaenopsis aphrodite subsp. formosana, which is usually used as a parent of horticultural breeding, to understand its anatomic and genetic regulatory mechanisms in variegation. Chloroplasts with well-organized thylakoids and starch grains were found only in the mesophyll cells of green sectors but not of yellow sectors, confirming that the variegation belongs to the chlorophyll type. The two-dimensional electrophoresis and LC/MS/MS also reveal differential expressions of PsbP and PsbO between the green and yellow leaf sectors...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28740096/associations-of-plasma-homocysteine-levels-with-peripheral-systolic-blood-pressure-and-noninvasive-central-systolic-blood-pressure-in-a-community-based-chinese-population
#6
Mohetaboer Momin, Fangfang Fan, Jianping Li, Xianhui Qin, Jia Jia, Litong Qi, Yan Zhang, Yong Huo
Previous studies indicated that homocysteine (Hcy) is associated with higher peripheral systolic blood pressure (pSBP). There have been few data on the relationship between Hcy and central SBP (cSBP). A total of 4,364 Chinese subjects from the Shijingshan community in Beijing were included. cSBP and pSBP were measured with an Omron HEM-9000AI device. Subjects were 57.20 ± 8.9 years old, 37.9% were male. The median of Hcy was 11.96 μmol/L. The mean of cSBP and pSBP was 129.94 ± 18.03 mmHg and 133...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28642783/ibor-regulates-photosynthesis-under-heat-stress-by-stabilizing-ibpsbp-in-sweetpotato
#7
Le Kang, Ho S Kim, Young S Kwon, Qingbo Ke, Chang Y Ji, Sung-Chul Park, Haeng-Soon Lee, Xiping Deng, Sang-Soo Kwak
The Orange (Or) protein regulates carotenoid biosynthesis and environmental stress in plants. Previously, we reported that overexpression of the sweetpotato [Ipomoea batatas (L.) Lam] Or gene (IbOr) in transgenic Arabidopsis (referred to as IbOr-OX/At) increased the efficiency of photosystem II (PSII) and chlorophyll content after heat shock. However, little is known about the role of IbOr in PSII-mediated protection against abiotic stress. In this study, comparative proteomics revealed that expression of PsbP (an extrinsic subunit of PSII) is up-regulated in heat-treated IbOr-OX/At plants...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28576401/-blood-pressure-values-in-adolescents-in-the-community-of-madrid-tables-based-on-the-mepafac-study
#8
A Molinero, M Cervero, M C Magro, T Partearroyo, P Zuluaga, A Martín
INTRODUCTION: High blood pressure (HBP) is a modifiable cardiovascular risk factor and its detection at early ages may allow strategies to be designed to reduce cardiovascular risk in adulthood. OBJECTIVES: To provide blood pressure (BP) values in a sample of adolescents using an electronic oscillometric device. MATERIAL AND METHODS: BP was measured according the European Society of Hypertension guidelines using an oscillometric device. Height and weight were also measured...
October 2017: Hipertensión y Riesgo Vascular
https://www.readbyqxmd.com/read/28534649/a-meta-analytical-comparison-of-atenolol-with-angiotensin-converting-enzyme-inhibitors-on-arterial-stiffness-peripheral-blood-pressure-and-heart-rate-in-hypertensive-patients
#9
Hong Xie, Gaoqing Luo, Yong Zheng, Feng Peng, Liangdi Xie
OBJECTIVES: This meta-analysis of randomized parallel controlled trials was designed to compare the efficacy of atenolol with angiotensin-converting enzyme inhibitors (ACEIs) in changing pulse wave velocity (PWV), peripheral blood pressure and heart rate (HR) among patients with essential hypertension. METHODS: This study was conducted according to the PRISMA guideline. Data collection was independently completed by two investigators. Statistical analyses were completed by Stata software (v12...
2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28523018/effect-of-azithromycin-in-combination-with-simvastatin-in-the-treatment-of-chronic-obstructive-pulmonary-disease-complicated-by-pulmonary-arterial-hypertension
#10
Peidong Wang, Jie Yang, Yanwei Yang, Zhixin Ding
OBJECTIVE: To evaluate the effect of azithromycin in combination with simvastatin in the treatment of chronic obstructive pulmonary disease (COPD) complicated by pulmonary arterial hypertension. METHODS: Eighty-six patients who developed COPD and pulmonary arterial hypertension and received treatment from August 2013 to October 2014 were selected and randomly divided into an observation group and a control group using random number table, 43 in each group. Patients in the control group were orally administrated 20 mg of simvastatin, once a day...
March 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28341915/in-vivo-system-for-analyzing-the-function-of-the-psbp-protein-using-chlamydomonas-reinhardtii
#11
Taishi Nishimura, Fumihiko Sato, Kentaro Ifuku
The PsbP protein is an extrinsic subunit of photosystem II (PSII) specifically developed in green-plant species including land plants and green algae. The protein-protein interactions involving PsbP and its effect on oxygen evolution have been investigated in vitro using isolated PSII membranes. However, the importance of those interactions needs to be examined at the cellular level. To this end, we developed a system expressing exogenous PsbP in the background of the Chlamydomonas BF25 mutant lacking native PsbP...
September 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28324975/quantification-of-peripheral-and-central-blood-pressure-variability-using-a-time-frequency-method
#12
Z Kouchaki, M Butlin, A Qasem, A P Avolio
Systolic blood pressure variability (BPV) is associated with cardiovascular events. As the beat-to-beat variation of blood pressure is due to interaction of several cardiovascular control systems operating with different response times, assessment of BPV by spectral analysis using the continuous measurement of arterial pressure in the finger is used to differentiate the contribution of these systems in regulating blood pressure. However, as baroreceptors are centrally located, this study considered applying a continuous aortic pressure signal estimated noninvasively from finger pressure for assessment of systolic BPV by a time-frequency method using Short Time Fourier Transform (STFT)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28260335/-association-of-peripheral-and-central-systolic-blood-pressure-with-urinary-albumin-to-creatinine-ratio-in-a-community-based-population-in-beijing
#13
F F Fan, Y X Li, J Jia, H X Li, L T Qi, Y Huo, Y Zhang
Objective: The aim of this study was to investigate the association of both peripheral and central systolic blood pressure (pSBP and cSBP) with urinary albumin-to-creatinine ratio (UACR) in a community-based population in Beijing. Methods: A total of 3 479 Chinese subjects with questionnaire, UACR, pSBP, and cSBP data available were included from an atherosclerosis cohort of Peking University First Hospital in Shijingshan District, Beijing followed up from April to July in 2014. Multivariate linear regression analyses were used to examine the effect of pSBP and cSBP on lnUACR, and further tests for interactions were performed according to associated covariates...
March 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/28227135/quantification-of-peripheral-and-central-blood-pressure-variability-using-a-time-frequency-method
#14
Z Kouchaki, M Butlin, A Qasem, A P Avolio, Z Kouchaki, M Butlin, A Qasem, A P Avolio, Z Kouchaki, A P Avolio, M Butlin, A Qasem
Systolic blood pressure variability (BPV) is associated with cardiovascular events. As the beat-to-beat variation of blood pressure is due to interaction of several cardiovascular control systems operating with different response times, assessment of BPV by spectral analysis using the continuous measurement of arterial pressure in the finger is used to differentiate the contribution of these systems in regulating blood pressure. However, as baroreceptors are centrally located, this study considered applying a continuous aortic pressure signal estimated noninvasively from finger pressure for assessment of systolic BPV by a time-frequency method using Short Time Fourier Transform (STFT)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28188547/structurally-conserved-channels-in-cyanobacterial-and-plant-photosystem-ii
#15
Naoki Sakashita, Hiroshi C Watanabe, Takuya Ikeda, Hiroshi Ishikita
In the cyanobacterial photosystem II (PSII), the O4-water chain in the D1 and CP43 proteins, a chain of water molecules that are directly H-bonded to O4 of the Mn4Ca cluster, is linked with a channel that connects the protein bulk surface along with a membrane-extrinsic protein subunit, PsbU (O4-PsbU channel). The cyanobacterial PSII structure also shows that the O1 site of the Mn4Ca cluster has a chain of H-bonded water molecules, which is linked with the channel that proceeds toward the bulk surface via PsbU and PsbV (O1-PsbU/V channel)...
September 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/27938387/impact-of-cushing-s-sign-in-the-prehospital-setting-on-predicting-the-need-for-immediate-neurosurgical-intervention-in-trauma-patients-a-nationwide-retrospective-observational-study
#16
MULTICENTER STUDY
Tetsuya Yumoto, Toshiharu Mitsuhashi, Yasuaki Yamakawa, Atsuyoshi Iida, Nobuyuki Nosaka, Kohei Tsukahara, Hiromichi Naito, Atsunori Nakao
BACKGROUND: Cushing's reflex usually results from intracranial hypertension. Although Cushing's sign can implicate severe traumatic brain injury (TBI) in injured patients, no major investigations have been made. The purpose of this study was to assess the predictability of life-threatening brain injury requiring immediate neurosurgical intervention (LT-BI) among trauma patients with Cushing's sign in the prehospital setting. METHODS: This was a retrospective study using data from the Japan Trauma Data Bank from the period of 2010 to 2014...
December 9, 2016: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
https://www.readbyqxmd.com/read/27933084/photosystem-ii-functionality-in-barley-responds-dynamically-to-changes-in-leaf-manganese-status
#17
Sidsel B Schmidt, Marta Powikrowska, Ken S Krogholm, Bianca Naumann-Busch, Jan K Schjoerring, Søren Husted, Poul E Jensen, Pai R Pedas
A catalytic manganese (Mn) cluster is required for the oxidation of water in the oxygen-evolving complex (OEC) of photosystem II (PSII) in plants. Despite this essential role of Mn in generating the electrons driving photosynthesis, limited information is available on how Mn deficiency affects PSII functionality. We have here used parameters derived from measurements of fluorescence induction kinetics (OJIP transients), non-photochemical quenching (NPQ) and PSII subunit composition to investigate how latent Mn deficiency changes the photochemistry in two barley genotypes differing in Mn efficiency...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27902495/methodological-evaluation-of-the-noninvasive-estimation-of-central-systolic-blood-pressure-in-nontreated-patients-the-bogalusa-heart-study
#18
COMPARATIVE STUDY
Camilo Fernandez, Robert Hsu, Gary Sander, Azad Hussain, Rupert Barshop, Shengxu Li, Tian Shu, Tao Zhang, Patrycja Galazka, Wei Chen, Lydia Bazzano, Thomas D Giles
OBJECTIVES: This study sought to compare the estimation of central systolic blood pressure (cSBP) obtained by two different noninvasive devices, in addition to its comparisons with measured peripheral systolic blood pressure (pSBP), in a biracial (Black/White) community-based cohort. PARTICIPANTS AND METHODS: Estimations of cSBP by applanation tonometry were obtained in 586 participants of the Bogalusa Heart Study (mean age: 43.5 years; 69% White, 54% women) using two different commonly used instruments: Omron HEM-9000AI and SphygmoCor CPV...
April 2017: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/27896527/an-enzyme-kinetics-study-of-the-ph-dependence-of-chloride-activation-of-oxygen-evolution-in-photosystem-ii
#19
Sergei Baranov, Alice Haddy
Oxygen evolution by photosystem II (PSII) involves activation by Cl(-) ion, which is regulated by extrinsic subunits PsbQ and PsbP. In this study, the kinetics of chloride activation of oxygen evolution was studied in preparations of PSII depleted of the PsbQ and PsbP subunits (NaCl-washed and Na2SO4/pH 7.5-treated) over a pH range from 5.3 to 8.0. At low pH, activation by chloride was followed by inhibition at chloride concentrations >100 mM, whereas at high pH activation continued as the chloride concentration increased above 100 mM...
March 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/27608290/targeting-phosphatidylserine-with-a-64-cu-labeled-peptide-for-molecular-imaging-of-apoptosis
#20
Amanda Perreault, Susan Richter, Cody Bergman, Melinda Wuest, Frank Wuest
Molecular imaging of programmed cell death (apoptosis) in vivo is an innovative strategy for early assessment of treatment response and treatment efficacy in cancer patients. Externalization of phosphatidylserine (PS) to the cell membrane surface of dying cells makes this phospholipid an attractive molecular target for the development of apoptosis imaging probes. In this study, we have radiolabeled PS-binding 14-mer peptide FNFRLKAGAKIRFG (PSBP-6) with positron-emitter copper-64 ((64)Cu) for PET imaging of apoptosis...
October 3, 2016: Molecular Pharmaceutics
keyword
keyword
70968
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"