Find your PDFs fast.
Welcome to the Pubget Medical Subject Headings (MESH) browser. Click on a topic or subtopic below to explore related papers. In the gold box is the most recent paper about the current MESH term, and below are 20 related papers.
Phycocyanin (0):
Recent article
Phycocyanin
Bioresource Technology (101)23 2010
Abstract
The prospects of utilizing pretreated seawater for the culture of Arthrospira (Spirulina) platensis was evaluated under laboratory conditions with three seawater media and a control: (1) Zarrouk media (freshwater-control) (2) seawater media SW 1 (3) seawater media SW2 and (4) seawater media SW 3. Th...
|
PMID: 20655201
PDF is available here.
PDF is available here.
| < More recent | Older article > |
Abstract
We presumed that microgravity might affect the toxin production of toxic cyanobacteria too. Microcystis aeruginosa PCC7806 was chosen as the model organism to investigate the effects of simulated microgravity (SMG) on the growth and toxin production of toxic cyanobacteria. SMG could inhibit the grow...
|
PMID: 20156472
PDF is available here.
PDF is available here.
Biofouling (26)5 2010
Abstract
Previous studies have provided evidence that color measurements enable on site quantification of superficial biofilms, thereby avoiding the need for sampling. In the present study, the efficiency of color measurements to evaluate to what extent pigment production is affected by environmental paramet...
|
PMID: 20425659
PDF is available here.
PDF is available here.
Abstract
This study explored the chronic and harmful effects of different doses of the triazole fungicide, tebuconazole, on the growth, and metabolic and enzymatic variations in the filamentous paddy field cyanobacterium, Westiellopsis prolifica Janet. The growth of the cyanobacterium was determined by an es...
|
PMID: 20668408
PDF is available here.
PDF is available here.
Physical Review Letters (104)9 2010
Abstract
We present results that show no sign of such a fragile-to-strong transition. The inflection of the elastic intensity at 220 K has a dynamic origin that is compatible with a calorimetric glass transition at 170 K. The temperature dependence of the relaxation times is highly sensitive to data evaluati...
|
PMID: 20367013
PDF is available here.
PDF is available here.
Applied Spectroscopy (64)3 2010
Abstract
Phycobiliprotein fluorescent labels are playing an increasingly important role in bioanalysis. They are also being used more and more frequently as light-harvesting materials for energy research. It is therefore critical to study the working conditions of these fluorescent dyes. Allophycocyanin (APC...
|
PMID: 20223069
PDF is available here.
PDF is available here.
Abstract
We applied the ORAC method to investigate the capacity of PC and PCB purified from the edible microalga Aphanizomenon flos-aquae to directly quench peroxyl radicals in comparison to well-known antioxidants molecules such as Trolox, ascorbic acid, and reduced glutathione. As a result, PCB was found t...
|
PMID: 20136460
PDF is available here.
PDF is available here.
Photosynthesis Research (103)1 2010
Abstract
We report that HO2, the protein encoded by ho2, was induced in the cells growing under a microaerobic atmosphere [0.2% (v/v) O(2)], whereas HO1 was constitutively expressed under both aerobic and microaerobic atmospheres. Light intensity did not have an effect on the expression of both the HOs. Cell...
|
PMID: 19937118
PDF is available here.
PDF is available here.
Biochemistry (Washington) (48)34 2009
Abstract
A binding site for iron protoporphyrin IX (heme) was designed and embedded in a photosynthetic non-heme protein, phycocyanin, which forms a globin-like backbone structure, called a globin fold, but lacks sequence similarity to the globin family containing myoglobins and hemoglobins. Based on the str...
|
PMID: 19601582
PDF is available here.
PDF is available here.
Abstract
The results showed that C-PC can be successfully used as an anti-inflammatory drug and that liposomal encapsulation is effective in improving its anti-inflammatory activity....
|
PMID: 19298687
PDF is available here.
PDF is available here.
Archives of Microbiology (191)4 2009
Abstract
We show that the small heat-shock protein HspA plays a protective role under oxidative stress in the cyanobacterium Synechococcus elongatus strain ECT16-1, which constitutively expresses HspA. Compared with the reference strain ECT, ECT16-1 showed much better growth and viability in the presence of...
|
PMID: 19169670
PDF is available here.
PDF is available here.
Abstract
APC (allophycocyanin) is widely used for fluorescence tagging and may be a promising antioxidant agent for use within the food and pharmaceutical industries. Chromophore attachment to apo-ApcA (apo-APC alpha-subunit without chromophore) can be autocatalysed both in vitro and in vivo. In the present...
|
PMID: 18547168
PDF is available here.
PDF is available here.
Abstract
We isolated 28 Pseudanabaena strains from the Baltic Sea (BS) and the Albufera de Valencia (AV; Spain). By combining phenotypic and genotypic approaches, the phylogeny, diversity and evolutionary diversification of these isolates were explored. Analysis of the in vivo absorption spectra of the Pseud...
|
PMID: 18769459
PDF is available here.
PDF is available here.
Abstract
The indicator function of the fluorescence signals of the cyanopigments phycocyanin and phycoerythrin as early warning parameters against the microcystins in drinking water was investigated by lab- and pilot-scale studies. The early warning function of the fluorescence signals was examined with rega...
|
PMID: 19403966
PDF is available here.
PDF is available here.
Abstract
We have previously demonstrated that C-phycocyanin (C-pc), a biliprotein from blue-green algae, transcriptionally regulates uPA through cAMP-dependent protein kinase A (PKA) pathway. To date, a role for C-pc in wound-healing scenario is not elucidated. This study was designed to examine the wound-he...
|
PMID: 18266963
PDF is available here.
PDF is available here.
Journal of Molecular Biology (383)2 2008
Abstract
We determined by NMR spectroscopy the first solution structure of the chromophore-binding cGMP phosphodiesterase/adenylcyclase/FhlA (GAF) domain from a cyanobacterial Phy assembled with phycocyanobilin (PCB). The three-dimensional NMR structure of Synechococcus OS-B' cyanobacterial Phy 1 in the red-...
|
PMID: 18762196
PDF is available here.
PDF is available here.
Journal of Immunology (181)9 2008
Abstract
We demonstrate that affinity maturation of the humoral response to a hapten is impaired when preexisting clonally restricted cells recognizing the hapten are dominant in the B cell repertoire. B1-8i(+/-) mice, which feature a high frequency of B cells with nitrophenyl (NP)-binding specificity, respo...
|
PMID: 18941192
PDF is available here.
PDF is available here.
Toxicology In Vitro (22)6 2008
Abstract
We investigated the effect of Spirulina platensis protean extract and the biliprotein phycocyanin isolated from this microalga, on the activities of the antioxidant enzymes SOD, CAT, GPx, and GR, lipid peroxidation inhibitory activity and glutathione levels after the iron induced oxidative stress in...
|
PMID: 18572379
PDF is available here.
PDF is available here.
Abstract
C-phycocyanin (C-PC) is a blue pigment in cyanobacteria, rhodophytes and cryptophytes with fluorescent and antioxidative properties. C-PC is presently extracted from open pond cultures of the cyanobacterium Arthrospira platensis although these cultures are not very productive and open for contaminat...
|
PMID: 18563408
PDF is available here.
PDF is available here.
Journal of Molecular Biology (380)5 2008
Abstract
We report the discovery of a novel cyanobacteriochrome, the green/red photoreceptor AnPixJ (All1069), isolated from the heterocyst-forming cyanobacterium Anabaena (Nostoc) sp. PCC 7120. Cyanobacteriochromes are a recently emerging tetrapyrrole-based photoreceptor superfamily that are distantly relat...
|
PMID: 18571200
PDF is available here.
PDF is available here.
Abstract
We isolated the chromophore-binding domain of CcaS from Synechocystis as well as from phycocyanobilin-producing Escherichia coli. Both preparations showed the same reversible photoconversion between a green-absorbing form (Pg, lambda(max) = 535 nm) and a red-absorbing form (Pr, lambda(max) = 672 nm)...
|
PMID: 18621684
PDF is available here.
PDF is available here.
Bioresource Technology (99)10 2008
Abstract
Our study indicates N. lobatus to be a promising bioresource for enhanced production of nutritionally rich biomass, pigments and antioxidants. The study also suggests that P and Fe are potentially effective supplements for scale-up production for commercial application....
|
PMID: 17919902
PDF is available here.
PDF is available here.
Abstract
We investigated the role of trehalose on the dynamics of the protein C-phycocyanin (C-PC) by neutron scattering. To single out the motions of C-PC hydrogen (H) atoms in various trehalose/water environments, measurements were performed in deuterated trehalose and heavy water (D2O). We report that tre...
|
PMID: 18185929
PDF is available here.
PDF is available here.
Abstract
We performed a 2-year survey of a perennial bloom of Planktothrix agardhii (cyanobacteria). Applying quantitative real-time PCR to the mcyA and phycocyanin genes, we found that the proportion of cells with the mcyA genotype varied considerably over time (ranging from 30 to 80% of the population). Th...
|
PMID: 18441113
PDF is available here.
PDF is available here.
Biotechnology Letters (30)6 2008
Abstract
Allophycocyanin (APC) is a phycobiliprotein with various biological and pharmacological properties. An expression vector containing five essential genes in charge of biosynthesis of cyanobacterial APC holo-alpha subunit (holo-ApcA) was constructed, resulting in over-expression of a fluorescent holo-...
|
PMID: 18224279
PDF is available here.
PDF is available here.
Abstract
We developed a novel type of "time-resolved" experimental setup on MIBEMOL time-of-flight neutron spectrometer (LLB, France). Data acquisition has been modified to get quasi-simultaneously "light" and "dark" measurements (with and without laser, respectively) and eliminate many spurious effects that...
|
PMID: 18463862
PDF is available here.
PDF is available here.
Abstract
We present a novel method for predicting protein interaction interfaces from sequences by using PAM matrix (PIFPAM). Sequence alignments for interacting proteins were constructed and parsed into segments using sliding windows. By calculating distance matrix for each segment, the correlation coeffici...
|
PMID: 18076046
PDF is available here.
PDF is available here.
Abstract
Our findings suggest that the Synechococcus heterotrophy plays an important role in cell's metabolism, and that the photoheterotrophic behavior, together with their chromatic adaptation capability, might represent the key for the absolute dominance of this genus in the Adriatic Sea....
|
PMID: 18336557
PDF is available here.
PDF is available here.
Abstract
In this study, recombinant allophycocyanin (rAPC) with a purity of 98% was transferred from a gel to a nitrocellulose (NC) membrane to develop a simple and efficient immuno-affinity membrane. Atomic force microscopy (AFM) was used to investigate the surface topography of the affinity membrane and it...
|
PMID: 18381693
PDF is available here.
PDF is available here.
Journal of Biological Chemistry (283)12 2008
Abstract
The Synechococcus sp. PCC 7002 genome encodes three genes, denoted cpcS-I, cpcU, cpcV, with sequence similarity to cpeS. CpcS-I copurified with His(6)-tagged (HT) CpcU as a heterodimer, CpcSU. When CpcSU was assayed for bilin lyase activity in vitro with phycocyanobilin (PCB) and apophycocyanin, the...
|
PMID: 18199753
PDF is available here.
PDF is available here.
Journal of Biological Chemistry (283)12 2008
Abstract
We conclude that the maturation of PBP in vivo depends on three PCB lyases: CpcE-CpcF, CpcS-I-CpcU, and CpcT....
|
PMID: 18199754
PDF is available here.
PDF is available here.
Biophysical Journal (94)6 2008
Abstract
I and photosystem II with very high efficiency on a 100-ps timescale. The excitation energy trapping times for both photosystem I ( approximately 30 ps) and photosystem I (200 and approximately 540 ps) correspond well to those obtained from experiments on isolated photosystems. The results are compa...
|
PMID: 18024506
PDF is available here.
PDF is available here.
Abstract
The two subunits of R-phycocyanin from Polysiphonia urceolata were isolated and renatured. The renatured subunits were characterized by electrophoresis, molecular weights and spectra. The blue-shifted spectra, fluorescence recovery and restoring of the energy transfer suggested correct refolding of...
|
PMID: 18264596
PDF is available here.
PDF is available here.
Abstract
In this study, a polyphasic approach was adopted to investigate natural freshwater (river and stream) samples of Rivularia colonies and isolated strains of cyanobacteria with a high degree of trichome tapering (genera Rivularia and Calothrix). Analysis of the phycocyanin (PC) operon and the interven...
|
PMID: 18218948
PDF is available here.
PDF is available here.
Abstract
We are able to detect at an early stage the conditions that could potentially lead to a risk, in order to start sampling. Due to its sensitivity, this tool proves suitable for monitoring aimed at reducing the risks incurred by the users of contaminated sites and launching preventative actions. The u...
|
PMID: 18246219
PDF is available here.
PDF is available here.
Voprosy pitaniya (77)4 2008
Abstract
Rats were fed for two weeks low-selenium semi-synthetic diet supplemented with different sources of selenium: sodium selenite (selenium concentration 96 and 350 mcg/kg diet), selenium-enriched Spirulina (selenium concentration 350 mcg/kg diet) and selenium-enriched Phycocyanin (selenium concentratio...
|
PMID: 18839810
PDF is available here.
PDF is available here.
Abstract
A single-laboratory validation study was conducted for a 2-wavelength spectrophotometric method for the determination of c-phycocyanin (cPC) and allophycocyanin (aPC) in Spirulina supplements and raw materials. The absorption maxima of cPC and aPC are at 620 and 650 nm, respectively. The concentrati...
|
PMID: 18567296
PDF is available here.
PDF is available here.
Bioresource Technology (99)1 2008
Abstract
Phycocyanin--a major phycobiliprotein constitutively produced by many cyanobacteria--holds several promising applications in diagnostics, biomedical research, and therapeutics. This paper discusses a novel rapid method for the purification of cyanobacterial phycocyanin (C-PC) from Phormidium fragile...
|
PMID: 17234404
PDF is available here.
PDF is available here.
Abstract
We show that coexistence of red and green picocyanobacteria in the Baltic Sea is widespread. The diversity and phylogeny of red and green picocyanobacteria was analysed using three different genes: 16S rRNA-ITS, the cpeBA operon of the red PE pigment and the cpcBA operon of the green PC pigment. Seq...
|
PMID: 17903216
PDF is available here.
PDF is available here.
Abstract
In this study the culture filtrate and C-phycocyanin obtained from filamentous fresh water cyanobacterium Westiellopsis sps were tested for their antibacterial activity against three different bacterial cultures: Bacillus subtilis, Pseudomonas sps and Xanthomonas sps. The growth of all bacterial str...
|
PMID: 18575156
PDF is available here.
PDF is available here.
Biochimica et Biophysica Acta (1777)1 2008
Abstract
Optical spectroscopic properties of the covalently linked chromophores of biliproteins are profoundly influenced by the state of the protein. This has been used to monitor the urea-induced denaturation of C-phycocyanin (CPC) from Mastigocladus laminosus and its subunits. Under equilibrium conditions...
|
PMID: 18036334
PDF is available here.
PDF is available here.
ChemBioChem (8)18 2007
Abstract
The detailed structure of the chromophore-binding pocket in phytochrome proteins and the structural changes associated with its photocycle are still matters of debate. Insight into the structure and dynamics of the binding pocket has been gained through the comparison of a (15)N NMR spectrum of alph...
|
PMID: 17973280
PDF is available here.
PDF is available here.
Abstract
Recent research reveals that free bilirubin functions physiologically as a potent inhibitor of NADPH oxidase activity. The chromophore phycocyanobilin (PCB), found in blue-green algae and cyanobacteria such as Spirulina, also has been found to be a potent inhibitor of this enzyme complex, likely bec...
|
PMID: 18158824
PDF is available here.
PDF is available here.
Molecular Microbiology (66)6 2007
Abstract
We show here that SipA, a protein that binds to the ATP-binding domain of the histidine kinase NblS, counteracts the function of the response regulator NblR in acclimation to stress, and is also involved in downregulation of the nblA gene. The integrity of the HLR1 element overlapping P(nblA-1) and...
|
PMID: 18004983
PDF is available here.
PDF is available here.
Journal of Biological Chemistry (282)47 2007
Abstract
Genes all5292 (cpcS2) and alr0617 (cpcS1) in the cyanobacterium Nostoc PCC7120 are homologous to the biliprotein lyase cpcS, and genes all5339 (cpcT1) and alr0647 (cpcT2) are homologous to the lyase cpcT. The functions of the encoded proteins were screened in vitro and in a heterologous Escherichia...
|
PMID: 17895251
PDF is available here.
PDF is available here.
Abstract
We concluded that MCYSTs may be involved in enhancing the efficiency of the adaptation of the photosynthetic apparatus to fluctuating inorganic carbon conditions in cyanobacterial cells....
|
PMID: 17827326
PDF is available here.
PDF is available here.
Abstract
Production of biomass and phycocyanin (PC) were investigated in highly pigmented variants of the unicellular rhodophyte Galdieria sulphuraria, which maintained high specific pigment concentrations when grown heterotrophically in darkness. The parental culture, G. sulphuraria 074G was grown on solidi...
|
PMID: 17786429
PDF is available here.
PDF is available here.
Life Sciences (81)19-20 2007
Abstract
Our results indicated that C-PC significantly inhibited the LPS-induced nitrite production and iNOS protein expression accompanied by an attenuation of tumor necrosis factor-alpha (TNF-alpha) formation but had no effect on interleukin-10 production in macrophages. Furthermore, C-PC also suppressed t...
|
PMID: 17961604
PDF is available here.
PDF is available here.
Abstract
We discuss our results with respect to the versatility of picocyanobacteria of the evolutionary lineage VI of cyanobacteria, and a habitat-related distribution pattern of Synechococcus genotypes....
|
PMID: 17825073
PDF is available here.
PDF is available here.
Biophysical Journal (93)7 2007
Abstract
The resonance Raman spectra of the Pr state of the N-terminal 65-kDa fragment of plant phytochrome phyA have been measured and analyzed in terms of the configuration and conformation of the tetrapyrroles methine bridges. Spectra were obtained from phyA adducts reconstituted with the natural chromoph...
|
PMID: 17545245
PDF is available here.
PDF is available here.
Biochemistry (New York) (72)10 2007
Abstract
I trimers induced by inactive reaction centers: P700 cation-radical or P700 in triplet state. In the other case, non-photochemical quenching in cyanobacteria takes place with contribution of water-soluble protein OCP (containing 3 -hydroxyechinenone) that induces reversible quenching of allophycocya...
|
PMID: 18021070
PDF is available here.
PDF is available here.
Abstract
The effects of spirulina and its chromophore phycocyanin, both without bound Se or selenium-enriched, were studied on plasma cholesterol, early atherosclerosis, cardiac production of superoxide anions, and NAD(P)H oxidase expression in hamsters. Forty hamsters were divided into 5 groups of 8 and fed...
|
PMID: 17696484
PDF is available here.
PDF is available here.
Biophysical Journal (93)6 2007
Abstract
We have established a quantum mechanics (QM)/molecular mechanics (MM) hybrid method for calculating the Raman spectra of protein-bound cofactors using the alpha-subunit of C-phycocyanin containing a phycocyanobilin (PCB) chromophore as a test case. The PCB cofactor was described with density functio...
|
PMID: 17513350
PDF is available here.
PDF is available here.
Journal of Ethnopharmacology (113)2 2007
Abstract
We previously reported the increase in free radical scavenging activities of Korean ginseng (KG, Panax ginseng C.A. Meyer) by heat processing. In the United States, American ginseng (AG, Panax quinquefolium L.) is a more commonly used herbal medicine than KG, but heat processing-induced chemical and...
|
PMID: 17618072
PDF is available here.
PDF is available here.
Abstract
We prepared TePixJ_GAF chromoprotein from heterologously expressed Synechocystis and performed spectral analysis after denaturation by comparing it with the cyanobacterial phytochrome Cph1 which harbors phycocyanobilin (PCB) as a chromophore. The results indicated that the chromophore of TePixJ is n...
|
PMID: 17715149
PDF is available here.
PDF is available here.
Abstract
We suggest that the final resonance energy transfer step occurs between the PCB 82 bilins on a timescale estimated to be approximately 15 ps. Such a rapid final energy transfer step cannot be rationalized by calculations that combine experimental parameters and quantum chemical calculations, which p...
|
PMID: 17721595
PDF is available here.
PDF is available here.
Abstract
Two phytochromes, CphA and CphB, from the cyanobacterium Calothrix PCC7601, with similar size (768 and 766 amino acids) and domain structure, were investigated for the essential length of their protein moiety required to maintain the spectral integrity. Both proteins fold into PAS-, GAF-, PHY-, and...
|
PMID: 17522854
PDF is available here.
PDF is available here.
Journal of Biological Chemistry (282)35 2007
Abstract
We found that: (a) PecA adds autocatalytically PCB, yielding a low absorbance, low fluorescence PCB.PecA adduct, termed P645 according to its absorption maximum; (b) In the presence of PecE, a high absorbance, high fluorescence PCB.PecA adduct is formed, termed P641; (c) PecE is capable of transform...
|
PMID: 17595164
PDF is available here.
PDF is available here.
Abstract
We report herein the role of oxygen, sensitizer, and light on the photochemical fate of MCs. The phycocyanin photosensitized transformation of MCs is elucidated, and photosensitized isomerization plays an important role in the process. The UV-A portion of sunlight was simulated using 350 nm light an...
|
PMID: 17822099
PDF is available here.
PDF is available here.
Abstract
C-PC (C-phycocyanin) is a water-soluble biliprotein from the filamentous cyanobacterium Spirulina platensis with potent antioxidant, anti-inflammatory and anticancerous properties. In the present study, the effect of C-PC was tested on the proliferation of doxorubicin-sensitive (S-HepG2) and -resist...
|
PMID: 17274761
PDF is available here.
PDF is available here.