keyword
MENU ▼
Read by QxMD icon Read
search

Cystine

keyword
https://www.readbyqxmd.com/read/28730346/gyrfalcons-falco-rusticolus-adjust-ctns-expression-to-food-abundance-a-possible-contribution-to-cysteine-homeostasis
#1
Ismael Galván, Ângela Inácio, Ólafur K Nielsen
Melanins form the basis of animal pigmentation. When the sulphurated form of melanin, termed pheomelanin, is synthesized, the sulfhydryl group of cysteine is incorporated to the pigment structure. This may constrain physiological performance because it consumes the most important intracellular antioxidant (i.e., glutathione, GSH), of which cysteine is a constitutive amino acid. However, this may also help avoid excess cysteine, which is toxic. Pheomelanin synthesis is regulated by several genes, some of them exerting this regulation by controlling the transport of cysteine in melanocytes...
July 20, 2017: Oecologia
https://www.readbyqxmd.com/read/28725568/a-compound-heterozygote-case-of-isolated-sulfite-oxidase-deficiency
#2
Daniel Brumaru, Eric Guerin, Anne-Claire Voegeli, Didier Eyer, Michel Maitre
We report an isolated sulfite oxidase deficiency in the first child boy of a non-consanguineous Caucasian family. He's a compound heterozygote for the sulfite oxidase gene, presenting low cystine, undetectable homocysteine and normal uric acid blood concentrations and undetectable sulfite oxidase activity in his cultured fibroblasts. Both mutations are not reported yet. The clinical presentation was typical and severe, with generalized status epilepticus and premature death.
September 2017: Molecular Genetics and Metabolism Reports
https://www.readbyqxmd.com/read/28724285/elucidating-potential-energy-surfaces-for-singlet-o2-reactions-with-protonated-deprotonated-and-di-deprotonated-cystine-using-a-combination-of-approximately-spin-projected-density-functional-theory-and-guided-ion-beam-mass-spectrometry
#3
Wenchao Lu, I-Hsien Midas Tsai, Yan Sun, Wenjing Zhou, Jianbo Liu
The reactivity of cystine towards electronically excited singlet O2 (a(1)Δg) has been long debated, despite the fact that most organic disulfides are susceptible to oxidation by singlet O2. We report a combined experimental and computational study on reactions of singlet O2 with gas-phase cystine at different ionization and hydration states, aimed to determine reaction outcomes, mechanisms and potential energy surfaces. Ion-molecule collisions of protonated and di-deprotonated cystine ions with (1)O2, in both the absence and the presence of a water ligand, were measured over a center-of-mass collision energy (Ecol) range from 0...
July 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28717662/clinical-and-molecular-characterization-of-cystinuria-in-a-french-cohort-relevance-of-assessing-large-scale-rearrangements-and-splicing-variants
#4
Pascaline Gaildrat, Said Lebbah, Abdellah Tebani, Bénédicte Sudrié-Arnaud, Isabelle Tostivint, Guillaume Bollee, Hélène Tubeuf, Thomas Charles, Aurelia Bertholet-Thomas, Alice Goldenberg, Frederic Barbey, Alexandra Martins, Pascale Saugier-Veber, Thierry Frébourg, Bertrand Knebelmann, Soumeya Bekri
BACKGROUND: Cystinuria is an autosomal recessive disorder of dibasic amino acid transport in the kidney and the intestine leading to increased urinary cystine excretion and nephrolithiasis. Two genes, SLC3A1 and SLC7A9, coding respectively for rBAT and b0,+AT, account for the genetic basis of cystinuria. METHODS: This study reports the clinical and molecular characterization of a French cohort including 112 cystinuria patients and 25 relatives from 99 families. Molecular screening was performed using sequencing and Quantitative Multiplex PCR of Short Fluorescent Fragments analyses...
July 2017: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/28714965/a-wellness-study-of-108-individuals-using-personal-dense-dynamic-data-clouds
#5
Nathan D Price, Andrew T Magis, John C Earls, Gustavo Glusman, Roie Levy, Christopher Lausted, Daniel T McDonald, Ulrike Kusebauch, Christopher L Moss, Yong Zhou, Shizhen Qin, Robert L Moritz, Kristin Brogaard, Gilbert S Omenn, Jennifer C Lovejoy, Leroy Hood
Personal data for 108 individuals were collected during a 9-month period, including whole genome sequences; clinical tests, metabolomes, proteomes, and microbiomes at three time points; and daily activity tracking. Using all of these data, we generated a correlation network that revealed communities of related analytes associated with physiology and disease. Connectivity within analyte communities enabled the identification of known and candidate biomarkers (e.g., gamma-glutamyltyrosine was densely interconnected with clinical analytes for cardiometabolic disease)...
July 17, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28710955/epidemiologic-evaluation-of-canine-urolithiasis-in-thailand-from-2009-to-2015
#6
Vachira Hunprasit, Carl A Osborne, Pamela J Schreiner, Jeff B Bender, Jody P Lulich
The cross-sectional study described the epidemiology of 8560 canine urolith submissions from Thailand to the Minnesota Urolith Center between January 2009 and December 2015. The frequency of urolith types, the relationships between urolith type and breed, sex, and neutered status, and change of annual submission proportion over the study period were analyzed. Struvite was the most common canine urolith (44%), and was commonly found in intact females with a mean age of 6.3±3.1years. Calcium oxalate was the second most common (27%), more frequently found in intact males with a mean age of 8...
July 9, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28701689/lybatides-from-lycium-barbarum-contain-an-unusual-cystine-stapled-helical-peptide-scaffold
#7
Wei Liang Tan, Ka H Wong, Jian Lei, Naoki Sakai, Hong Wei Tan, Rolf Hilgenfeld, James P Tam
Cysteine-rich peptides (CRPs) of 2-6 kDa are generally thermally and proteolytically stable because of their multiple cross-bracing disulfide bonds. Here, we report the discovery and characterization of two novel cystine-stapled CRPs, designated lybatide 1 and 2 (lyba1 and lyba2), from the cortex of Lycium barbarum root. Lybatides, 32 to 33 amino acids in length, are hyperstable and display a novel disulfide connectivity with a cysteine motif of C-C-C-C-CC-CC which contains two pairs of adjacent cysteines (-CC-CC)...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28700346/restoring-microenvironmental-redox-and-ph-homeostasis-inhibits-neoplastic-cell-growth-and-migration-therapeutic-efficacy-of-esomeprazole-plus-sulfasalazine-on-3-mca-induced-sarcoma
#8
Enrica Balza, Patrizia Castellani, Paola Sanchez Moreno, Patrizia Piccioli, Iria Medraño-Fernandez, Claudia Semino, Anna Rubartelli
Neoplastic cells live in a stressful context and survive thanks to their ability to overcome stress. Thus, tumor cell responses to stress are potential therapeutic targets. We selected two such responses in melanoma and sarcoma cells: the xc- antioxidant system, that opposes oxidative stress, and surface v-ATPases that counteract the low pHi by extruding protons, and targeted them with the xc- blocker sulfasalazine and the proton pump inhibitor esomeprazole. Sulfasalazine inhibited the cystine/cysteine redox cycle and esomeprazole decreased pHi while increasing pHe in tumor cell lines...
June 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28698826/expression-refolding-and-spectroscopic-characterization-of-fibronectin-type-iii-fniii-homology-domains-derived-from-human-fibronectin-leucine-rich-transmembrane-protein-flrt-1-2-and-3
#9
Lila Yang, Maria Hansen Falkesgaard, Peter Waaben Thulstrup, Peter Schledermann Walmod, Leila Lo Leggio, Kim Krighaar Rasmussen
The fibronectin leucine rich transmembrane (FLRT) protein family consists in humans of 3 proteins, FLRT1, -2, and -3. The FLRT proteins contain two extracellular domains separated by an unstructured linker. The most membrane distal part is a leucine rich repeat (LRR) domain responsible for both cis- and trans-interactions, whereas the membrane proximal part is a fibronectin type III (FnIII) domain responsible for a cis-interaction with members of the fibroblast growth factor receptor 1 (FGFR1) family, which results in FGFR tyrosine kinase activation...
2017: PeerJ
https://www.readbyqxmd.com/read/28695929/biomolecule-mediated-hydrothermal-synthesis-of-polyoxoniobate-cds-nanohybrids-with-enhanced-photocatalytic-performance-for-hydrogen-production-and-rhb-degradation
#10
Meiying Liu, Hong Chen, Hongmei Zhao, Yunfei He, Yunhe Li, Ran Wang, Lancui Zhang, Wansheng You
Using a biomolecule of l-cystine as the sulfur source and coordinating agent, polyoxoniobate-CdS nanohybrids were successfully synthesized under mild hydrothermal conditions. The adsorption of ammonium group (-NH2) in l-cystine molecular structure on the surface of CdS renders the amine-anchored CdS positively charged, which readily combines with the negatively charged polyoxoniobate clusters in terms of the electrostatic interaction. The as-obtained polyoxoniobate-CdS nanohybrids exhibit much superior activity for H2 evolution and RhB degradation under visible light as compared to the unhybridized CdS and polyoxoniobate...
July 11, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28692254/dissecting-the-disulfide-linkage-of-n-terminal-domain-of-hmw-1dx5-and-its-contributions-to-dough-functionality
#11
JingJing Wang, Guang Liu, Yanbo Huang, Qiaohui Zeng, Yi Hou, Lin Li, Shiyi Ou, Min Zhang, Song-Qing Hu
N-terminal domain of HMW-GS 1Dx5 (1Dx5-N) contains three cysteine residues (Cys10, Cys25, Cys40), which are the basis of gluten network formation through disulfide bonds. Disulfide linkage in 1Dx5-N was dissected by site-directed mutagenesis and LC-MS/MS, and its contributions to structural and conformational stability of 1Dx5-N and dough functionality were investigated by circular dichroism, intrinsic fluorescence, surface hydrophobicity determination, size exclusion chromatography, non-reducing/reducing SDS-PAGE, atomic force microscopy and farinographic analysis...
July 10, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28689648/clinical-and-genetic-characterization-of-chinese-pediatric-cystine-stone-patients
#12
Luming Shen, Xiaoming Cong, Xin Zhang, Ninghong Wang, Ping Zhou, Yan Xu, Qingyi Zhu, Xiaojian Gu
INTRODUCTION: Cystine stone is the only clinical manifestation in patients with cystinuria, which is an autosomal recessive inheritable disease. However, clinical and genetic data vary among patients in different countries. OBJECTIVE: To investigate the characteristics of Chinese pediatric cystine stone patients. PATIENTS AND METHODS: Thirteen pediatric patients with cystine stones were evaluated in our clinic between 2012 and 2015. Gene mutations in SLC3A1 and SLC7A9 were investigated...
June 24, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28686242/keratin-dissolution-extraction-and-biomedical-application
#13
REVIEW
Amin Shavandi, Tiago H Silva, Adnan A Bekhit, Alaa El-Din A Bekhit
Keratinous materials such as wool, feathers and hooves are tough unique biological co-products that usually have high sulfur and protein contents. A high cystine content (7-13%) differentiates keratins from other structural proteins, such as collagen and elastin. Dissolution and extraction of keratin is a difficult process compared to other natural polymers, such as chitosan, starch, collagen, and a large-scale use of keratin depends on employing a relatively fast, cost-effective and time efficient extraction method...
July 7, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28681454/human-monocytes-downregulate-innate-response-receptors-following-exposure-to-the-microbial-metabolite-n-butyrate
#14
Felix Lasitschka, Thomas Giese, Marco Paparella, Stefan R Kurzhals, Guido Wabnitz, Katrin Jacob, Judith Gras, Konrad A Bode, Anne-Kristin Heninger, Timea Sziskzai, Yvonne Samstag, Cornelia Leszinski, Bettina Jocher, Mohammed Al-Saeedi, Stefan C Meuer, Jutta Schröder-Braunstein
INTRODUCTION: Hyporesponsiveness of human lamina propria immune cells to microbial and nutritional antigens represents one important feature of intestinal homeostasis. It is at least partially mediated by low expression of the innate response receptors CD11b, CD14, CD16 as well as the cystine-glutamate transporter xCT on these cells. Milieu-specific mechanisms leading to the down-regulation of these receptors on circulating monocytes, the precursor cells of resident macrophages, are mostly unknown...
July 6, 2017: Immunity, Inflammation and Disease
https://www.readbyqxmd.com/read/28680440/vaccatides-antifungal-glutamine-rich-hevein-like-peptides-from-vaccaria-hispanica
#15
Ka H Wong, Wei Liang Tan, Shruthi G Kini, Tianshu Xiao, Aida Serra, Sui Kwan Sze, James P Tam
Hevein and hevein-like peptides are disulfide-constrained chitin-binding cysteine-rich peptides. They are divided into three subfamilies, 6C-, 8C-, and 10C-hevein-like peptides, based on the number of cysteine residues. In addition, hevein-like peptides can exist in two forms, short and long. The long C-terminal form found in hevein and 10C-hevein-like peptides contain a C-terminal protein cargo. In contrast, the short form without a protein cargo is found in all three subfamilies. Here, we report the discovery and characterization of two novel glutamine-rich and protein cargo-free 8C-hevein-like peptides, vaccatides vH1 and vH2, from Vaccaria hispanica of the Caryophyllaceae family...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28678386/association-between-cystine-urolithiasis-and-neuter-status-of-dogs-within-the-uk
#16
J Florey, V Ewen, H Syme
OBJECTIVES: The objectives of the study were to examine the association between diagnosis of cystine urolithiasis and entire versus neutered status in male dogs and whether the strength of association varies among breeds. MATERIALS AND METHODS: A previously reported canine urolithiasis database was used, documenting all urolith submissions to Hill's Pet Nutrition UK over a 10-year period. Uroliths were classified as cystine or non-cystine, and only male dogs with known neuter status were included in the analysis...
July 5, 2017: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/28673276/worldwide-view-of-nephropathic-cystinosis-results-from-a-survey-from-30-countries
#17
Aurélia Bertholet-Thomas, Julien Berthiller, Velibor Tasic, Behrouz Kassai, Hasan Otukesh, Marcella Greco, Jochen Ehrich, Rejane de Paula Bernardes, Georges Deschênes, Sally-Ann Hulton, Michel Fischbach, Kenza Soulami, Bassam Saeed, Ehsan Valavi, Carlos Jose Cobenas, Bülent Hacihamdioglu, Gabrielle Weiler, Pierre Cochat, Justine Bacchetta
BACKGROUND: Nephropathic cystinosis is a rare inherited metabolic disorder leading to progressive renal failure and extra-renal comorbidity. The prognosis relies on early adherence to cysteamine treatment and symptomatic therapies. Developing nations [DiN] experience many challenges for management of cystinosis. The aim of this study was to assess the management characteristics in DiN compared with developed nations [DeN]. METHODS: A questionnaire was sent between April 2010 and May 2011 to 87 members of the International Pediatric Nephrology Association, in 50 countries...
July 3, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28669767/bactericidal-activity-of-cyclotides-where-phosphatidylethanolamine-lipid-selectivity-determines-antimicrobial-spectra
#18
Adam A Strömstedt, Sungkyu Park, Robert Burman, Ulf Göransson
Cyclotides are a family of plant peptides characterized by a cystine knot embedded in a macrocyclic backbone. They bind to and disrupt phospholipid membranes, which explain their lytic activity on cells. In this study, we expose the full antibacterial potency of cyclotides by avoiding its inhibition by rich growth media assay conditions. For that purpose a two-step microdilution assay protocol was developed, using non-growing conditions during initial peptide incubation. A diverse set of cyclotides was tested for antibacterial and antifungal activity, and the results show that most cyclotides are active under these conditions, especially against Gram-negative bacteria...
June 29, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28667066/redox-theory-of-aging-implications-for-health-and-disease
#19
REVIEW
Young-Mi Go, Dean P Jones
Genetics ultimately defines an individual, yet the phenotype of an adult is extensively determined by the sequence of lifelong exposures, termed the exposome. The redox theory of aging recognizes that animals evolved within an oxygen-rich environment, which created a critical redox interface between an organism and its environment. Advances in redox biology show that redox elements are present throughout metabolic and structural systems and operate as functional networks to support the genome in adaptation to environmental resources and challenges during lifespan...
July 15, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28667005/mtorc2-regulates-the-cystine-glutamate-antiporter-xct
#20
(no author information available yet)
mTORC2 controls glutamate and glutathione metabolism in cancer cells by phosphorylating xCT.
June 30, 2017: Cancer Discovery
keyword
keyword
58754
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"