Abstract:
:Bovine rhodopsin was recombined with various phospholipids in which the lipid acyl chain composition was held constant at that of egg phosphatidylcholine (PC), while the identity of the headgroups was varied. The ratio of MII/MI produced in the recombinant membrane vesicles by an actinic flash was studied as a function of pH, and compared to the photochemical activity observed for rhodopsin in native ROS membranes. MI and MII were found to coexist in a pH-dependent, acid-base equilibrium on the millisecond timescale. Recombinants made with phospholipids containing unsaturated acyl chains were capable of full native-like MII production, but demonstrated titration curves with different pK values. The presence of phosphoethanolamine or phosphoserine headgroups increased the amount of MII produced. In the case of phosphatidylserine this may result from alteration of the membrane surface potential, leading to an increase in the local H+ activity. The results indicate that the Gibbs free energies of the MI and MII conformational states are influenced by the membrane bilayer environment, suggesting a possible role of lipids in visual excitation.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Gibson NJ,Brown MFdoi
10.1016/s0006-291x(05)80273-6subject
Has Abstractpub_date
1991-04-30 00:00:00pages
915-21issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(05)80273-6journal_volume
176pub_type
杂志文章abstract::Experiments were undertaken to examine the effects of reduced (GSH) and oxidized (GSSG) glutathione on lipid peroxidation of rat liver microsomes. Dependence on microsomal alpha-tocopherol was shown for the GSH inhibition of lipid peroxidation. However, when GSH (5 mM) and GSSG (2.5 mM) were combined in the assay syst...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(90)90904-2
更新日期:1990-01-30 00:00:00
abstract::We previously showed that the epidermal growth factor (EGF) receptor in human A431 epidermoid carcinoma cells undergoes a slow post-translational modification whereby it acquires (t1/2 = 30-40 min) EGF binding capacity (Slieker, L.J., et. al. (1986) J. Biol. Chem., 261, 15233-15241). This activation occurs in the endo...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/s0006-291x(88)81194-x
更新日期:1988-05-31 00:00:00
abstract::Strategies that antagonize growth factor signaling are attractive candidates for the biological therapy of brain tumors. HGF/NK2 is a secreted truncated splicing variant and potential antagonist of scatter factor/hepatocyte growth factor (SF/HGF), a multifunctional cytokine involved in the malignant progression of sol...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.2000.2935
更新日期:2000-06-24 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1995.1760
更新日期:1995-05-25 00:00:00
abstract::Complementation studies, using fused cell lines from patients with peroxisomal disorders, have shown correction of defective plasmalogen synthesis and phytanic acid oxidation as well as an increase in the number of peroxisomes. At least six complementation groups have been reported. We demonstrate here that complement...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/s0006-291x(05)80218-9
更新日期:1990-10-15 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1994.2524
更新日期:1994-10-28 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1997.6679
更新日期:1997-05-29 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1993.1010
更新日期:1993-01-15 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2014.04.033
更新日期:2014-05-09 00:00:00
abstract::The mRNA for the novel aldehyde dehydrogenase 5 (ALDH5) gene was detected in HuH7 hepatoma cells. The cells also expressed cytosolic aldehyde dehydrogenase (ALDH1) mRNA, but no mitochondrial aldehyde dehydrogenase (ALDH2) mRNA. Extracts of the hepatoma cells contained an enzymatic activity with an isoelectric point si...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1995.1789
更新日期:1995-06-06 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1999.0844
更新日期:1999-06-16 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(89)91124-8
更新日期:1989-09-29 00:00:00
abstract::Overexpression in Escherichia coli of the fdx4 gene from Aquifex aeolicus has allowed isolation and characterization of the first hyperthermophilic [2Fe-2S](Scys)(4) protein, a homodimer of M = 2 x 12.4 kDa with one [2Fe-2S] cluster per subunit. This protein is undamaged by heating to 100 degrees C for at least three ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1999.1138
更新日期:1999-08-11 00:00:00
abstract::AIDS patients (2 groups) had a blood deficiency (p less than 0.001) of coenzyme Q10 vs. 2 control groups. AIDS patients had a greater deficiency (p less than 0.01) than ARC patients. ARC patients had a deficiency (p less than 0.05) vs. control. HIV-infected patients had a deficiency (p less than 0.05) vs. control. The...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/s0006-291x(88)81179-3
更新日期:1988-06-16 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1998.8285
更新日期:1998-03-17 00:00:00
abstract::Because brain inositides are enriched in the 1-stearoyl-2-arachidonoyl species, they form a likely source for the tetraenoic free fatty acids (FFA) and diacylglycerols (DG) that are accumulated during seizures. To study inositide turnover during bicuculline-induced seizures, rats were injected intraventricularly and b...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(86)90515-2
更新日期:1986-04-29 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2020.04.155
更新日期:2020-07-05 00:00:00
abstract::Estrogen-dependent diseases, especially breast cancers, are frequently treated with aromatase inhibitors. Another more recent strategy is the antisense technology. In this study, after predicting aromatase mRNA secondary structure, we describe the design, the efficiency, and the toxicity of two antisense phosphorothio...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1998.9683
更新日期:1998-12-09 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1998.8934
更新日期:1998-07-09 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2016.03.013
更新日期:2016-04-15 00:00:00
abstract::Mesenchymal stem cells (MSCs) have been isolated from various tissues and used for elucidating the pathogenesis of numerous diseases. In our previous in vitro study, we showed the existence of MSCs in human spinal ligaments and hypothesized that these MSCs contributed to the pathogenesis of ossification of spinal liga...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2013.06.019
更新日期:2013-07-12 00:00:00
abstract::Membrane rafts are small and dynamic regions enriched in sphingolipids, cholesterol, ganglioside GM1 and protein markers like flotillins, forming the flatter domains or caveolins, which are characterized as stable flask-shape invaginations. We explored whether membrane rafts participate in the entry of Trypanosoma cru...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2007.09.068
更新日期:2007-11-23 00:00:00
abstract::Hsp90 interacts with proteins that mediate signaling pathways involved in the regulation of essential processes such as proliferation, cell cycle control, angiogenesis and apoptosis. Hsp90 inhibition is therefore an attractive strategy for blocking abnormal pathways that are crucial for cancer cell growth. In the pres...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2012.04.032
更新日期:2012-05-04 00:00:00
abstract::Lysine-specific demethylase 1 (LSD1) is upregulated in many cancers, especially neuroblastoma. We set out to explore whether geranylgeranoic acid (GGA) inhibits LSD1 activity by using recombinant human LSD1. GGA inhibited LSD1 activity with IC50 similar to that of the clinically used drug tranylcypromine. In human neu...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2013.12.144
更新日期:2014-01-31 00:00:00
abstract::Sequence analysis of a new lignin peroxidase (LIP) gene, GLG6, from P. chrysosporium showed that it encodes a mature LIP protein with a predicted Mr of 36,454. A 28 aa signal peptide precedes the mature protein. The coding region of GLG6 is interrupted by nine introns ranging in size from 50-57 bp. GLG6 encoded-LIP ha...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/s0006-291x(05)80884-8
更新日期:1990-12-31 00:00:00
abstract::In this report we demonstrate formation of a triplex structure by an antiparallel RNA oligonucleotide corresponding to the 21 bp polypurine-pyrimidine stretch from -141 to -162 of the rat alpha 1(I) procollagen promoter with a Kd of 0.1-0.2 microM. The formation of triplexes by the triplex forming oligoribonucleotide ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1998.9113
更新日期:1998-08-10 00:00:00
abstract::A bank of pTV32 (Tn 917 lacZ) - generated Bacillus subtilis mutants were examined on milk agar for the ability to produce proteases at 48 degrees C. A single mutant, BUL786, was isolated, which could hydrolyze casein after overnight incubation at 48 degrees C. This mutant secreted protease 10 fold more at 48 degrees C...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/s0006-291x(86)80528-9
更新日期:1986-07-31 00:00:00
abstract::NAD+ is a co-enzyme in redox reactions and a substrate required for activity of various enzyme families, including sirtuins and poly(ADP-ribose) polymerases. Dietary supplementation of NAD+ precursors nicotinamide mononucleotide (NMN) or nicotinamide riboside (NR) protects against metabolic disease, neurodegenerative ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2018.04.107
更新日期:2018-06-02 00:00:00
abstract::Gliomas are the leading cause of death among adults with primary brain malignancies. Treatment for malignant gliomas remains limited, and targeted therapies have been incompletely explored. Nuclear factor erythroid 2-related factor 2 (Nrf2), a key transcription regulator for antioxidant and detoxification enzymes, is ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2015.12.034
更新日期:2016-01-15 00:00:00
abstract::In a recent publication [Biochem. Biophys. Res. Commun. 317 (2004) 957] it was proposed that the 'effective number of codons' (Nc) in a gene should be calculated by summing the individual amino acid Nc's using rounding whenever the codon homozygosities are lower than the reciprocal value of the number of members of th...
journal_title:Biochemical and biophysical research communications
pub_type: 评论,杂志文章
doi:10.1016/j.bbrc.2004.11.133
更新日期:2005-02-04 00:00:00