Abstract:
:Thaumatin is an intensely sweet-tasting protein that elicits sweet taste at a concentration of 50 nM, a value 100,000 times larger than that of sucrose on a molar basis. Here we attempted to produce a protein with enhanced sweetness by removing negative charges on the interacting side of thaumatin with the taste receptor. We obtained a D21N mutant which, with a threshold value 31 nM is much sweeter than wild type thaumatin and, together with the Y65R mutant of single chain monellin, one of the two sweetest proteins known so far. The complex model between the T1R2-T1R3 sweet receptor and thaumatin, derived from tethered docking in the framework of the wedge model, confirmed that each of the positively charged residues critical for sweetness is close to a receptor residue of opposite charge to yield optimal electrostatic interaction. Furthermore, the distance between D21 and its possible counterpart D433 (located on the T1R2 protomer of the receptor) is safely large to avoid electrostatic repulsion but, at the same time, amenable to a closer approach if D21 is mutated into the corresponding asparagine. These findings clearly confirm the importance of electrostatic potentials in the interaction of thaumatin with the sweet receptor.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Masuda T,Ohta K,Ojiro N,Murata K,Mikami B,Tani F,Temussi PA,Kitabatake Ndoi
10.1038/srep20255subject
Has Abstractpub_date
2016-02-03 00:00:00pages
20255issn
2045-2322pii
srep20255journal_volume
6pub_type
杂志文章abstract::Prophages are known to encode important virulence factors in the human pathogen Vibrio cholerae. However, little is known about the occurrence and composition of prophage-encoded traits in environmental vibrios. A database of 5,674 prophage-like elements constructed from 1,874 Vibrio genome sequences, covering sixty-f...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-28326-9
更新日期:2018-07-02 00:00:00
abstract::The current molecular docking study provided the Free Energy of Binding (FEB) for the interaction (nanotoxicity) between VDAC mitochondrial channels of three species (VDAC1-Mus musculus, VDAC1-Homo sapiens, VDAC2-Danio rerio) with SWCNT-H, SWCNT-OH, SWCNT-COOH carbon nanotubes. The general results showed that the FEB ...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-13691-8
更新日期:2017-10-16 00:00:00
abstract::In this work, we introduce a novel and facile method of exfoliating large-area, single-layer graphene oxide using a shearing stress. The shearing stress reactor consists of two concentric cylinders, where the inner cylinder rotates at controlled speed while the outer cylinder is kept stationary. We found that the form...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-16649-y
更新日期:2017-11-27 00:00:00
abstract::Rift Valley fever virus (RVFV) is a mosquito-borne hemorrhagic fever virus affecting both humans and animals with severe morbidity and mortality and is classified as a potential bioterror agent due to the possible aerosol transmission. At present there is no human vaccine or antiviral therapy available. Thus, there is...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-20362-9
更新日期:2018-01-31 00:00:00
abstract::We have developed an optimized protocol for plasma targeted mRNA sequencing in our previous study. Here, we performed plasma targeted mRNA sequencing for 40 colorectal adenoma patients and 39 colonoscopy-proven normal controls in order to find potential circulating mRNA markers for colorectal adenoma. Results showed t...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-019-49445-x
更新日期:2019-09-10 00:00:00
abstract::The process of second-harmonic generation (SHG) in a finite one-dimensional nonlinear medium is analyzed in parallel by the Green-function technique and the Fourier-transform method. Considering the fundamental pump field propagating along a given direction and eliminating back-reflections at the boundaries the terms ...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-019-39260-9
更新日期:2019-03-20 00:00:00
abstract::Here, we report a newly designed knee plug to be used in the 3rd generation of Autologous Chondrocyte Implantation (ACI) in order to heal the damaged knee cartilage. It is composed of three components: The first component (Bone Portion) is a 3D printed hard scaffold with large pores (~ 850 µm), made by hydroxyapatite ...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-020-73863-x
更新日期:2020-10-12 00:00:00
abstract::The distribution of potassium (K+) ions on air-cleaved mica is important in many interfacial phenomena such as crystal growth, self-assembly and charge transfer on mica. However, due to experimental limitations to nondestructively probe single ions and ionic domains, their exact lateral organization is yet unknown. We...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep43451
更新日期:2017-03-06 00:00:00
abstract::Applications of biomaterials in cancer therapy has been limited to drug delivery systems and markers in radiation therapy. In this article, we introduce the concept of phase-functionalization of silicon to preferentially select cancer cell populations for survival in a catalyst and additive free approach. Silicon is p...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep10826
更新日期:2015-06-04 00:00:00
abstract::This paper presents the results of the experiments which were performed using the optical biopsy system specially developed for in vivo tissue classification during the percutaneous needle biopsy (PNB) of the liver. The proposed system includes an optical probe of small diameter acceptable for use in the PNB of the li...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-020-71089-5
更新日期:2020-08-26 00:00:00
abstract::In this paper, the effect of binder decay rather than a change in the pigments on the blurring of ancient wall paintings was researched. The simulated wall paintings were prepared by brushing an aqueous solution containing gelatine and ochre grains on the surface of cylindrical compressed soil samples. Then, the dried...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-020-78117-4
更新日期:2020-12-03 00:00:00
abstract::Two-dimensional (2D) cell cultures growing on plastic do not recapitulate the three dimensional (3D) architecture and complexity of human tumors. More representative models are required for drug discovery and validation. Here, 2D culture and 3D mono- and stromal co-culture models of increasing complexity have been est...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep28951
更新日期:2016-07-01 00:00:00
abstract::Excessive tillage and soil compaction threaten the sustainable farmlands in the Huang-Huai-Hai Plains of China. Our study explores tillage practices to improve soil and root ecology and promote productivity in the winter wheat fields. We tested the impact of plowing, rotary, strip rotary tillage and strip rotary tilla...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-019-48159-4
更新日期:2019-08-12 00:00:00
abstract::Delivery and expression of recombinant genes, a key methodology for many applications in biological research, remains a challenge especially for mature neurons. Here, we report easy, highly efficient and well tolerated transduction of adult peripheral and central neuronal populations of diverse species in culture usin...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep38928
更新日期:2016-12-13 00:00:00
abstract::The spinal dorsal horn (SDH) is comprised of distinct neuronal populations that process different somatosensory modalities. Somatostatin (SST)-expressing interneurons in the SDH have been implicated specifically in mediating mechanical pain. Identifying the transcriptomic profile of SST neurons could elucidate the uni...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-25110-7
更新日期:2018-05-01 00:00:00
abstract::In this study, dye-sensitized solar cells (DSSCs) has been assembled with poly(1-vinylpyrrolidone-co-vinyl acetate) (P(VP-co-VAc)) gel polymer electrolytes (GPEs) which have been incorporated with binary salt and an ionic liquid. The potential of this combination was studied and reported. The binary salt system GPEs w...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep27630
更新日期:2016-06-08 00:00:00
abstract::Although aversive memory has been mainly addressed by analysing the changes occurring in average populations, the study of neuronal mechanisms of outliers allows understanding the involvement of individual differences in fear conditioning and extinction. We recently developed an innovative experimental model of indivi...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep21205
更新日期:2016-02-15 00:00:00
abstract::Amyotrophic lateral sclerosis (ALS) is an incurable and fatal neurodegenerative disease. Increasing the chances of success for future clinical strategies requires more in-depth knowledge of the molecular basis underlying disease heterogeneity. We recently laid the foundation for a molecular taxonomy of ALS by whole-ge...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-019-46355-w
更新日期:2019-07-10 00:00:00
abstract::An amendment to this paper has been published and can be accessed via a link at the top of the paper. ...
journal_title:Scientific reports
pub_type: 已发布勘误
doi:10.1038/s41598-020-75952-3
更新日期:2020-10-29 00:00:00
abstract::Adult-onset vitelliform macular dystrophy (AVMD) is a common and benign macular degeneration which can be caused by BEST1 mutation. Here, we investigated the clinical characteristics associated with a newly identified BEST1 mutation, p.Ile38Ser and confirmed the associated physiological functional defects. The 51-year...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-09629-9
更新日期:2017-08-22 00:00:00
abstract::We have assembled the complete sequence of the Durio zibethinus chloroplast genome using long PacBio reads. Durian is a valuable commercial tree that produces durian fruit, which is popular in Southeast Asia. The chloroplast genome assembled into a single 143 kb cyclic contig that contained 111 genes. There were 46 sh...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-020-73549-4
更新日期:2020-10-07 00:00:00
abstract::HIV-1 latency generates reservoirs that prevent viral eradication by the current therapies. To find strategies toward an HIV cure, detailed understandings of the molecular mechanisms underlying establishment and persistence of the reservoirs are needed. The cellular transcription factor KAP1 is known as a potent repre...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-021-82164-w
更新日期:2021-01-29 00:00:00
abstract::We propose a method to simulate spin models in trapped ions using a digital-analog approach, consisting in a suitable gate decomposition in terms of analog blocks and digital steps. In this way, we show that the quantum dynamics of an enhanced variety of spin models could be implemented with substantially less number ...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep30534
更新日期:2016-07-29 00:00:00
abstract::Plant cell cultures are an attractive platform for the production of recombinant proteins. A major drawback, hindering the establishment of plant cell suspensions as an industrial platform, is the low product yield obtained thus far. Histone acetylation is associated with increased transcription levels, therefore it i...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-17006-9
更新日期:2017-12-01 00:00:00
abstract::Croup is the leading infectious disease resulting in pediatric upper airway obstruction. Our purpose is to analyze diverse features of neck radiographs could be seen as an objective tool to predict outcomes in patients with croup. One hundred and ninety-two patients were prospectively recruited in pediatric emergency ...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-019-54140-y
更新日期:2019-11-29 00:00:00
abstract::A subset of the family of fluorescent proteins are the non-fluorescent chromoproteins which are promising probe molecules for use in photoacoustic imaging and as acceptor chromophores in Förster resonance energy transfer (FRET)-based biosensors. Typical approaches for fluorescent protein optimization by screening of l...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep22129
更新日期:2016-03-01 00:00:00
abstract::This paper reports a facile and green method for conversion of graphene oxide (GO) into graphene by low-temperature heating (80 °C) in the presence of a glass wafer. Compared to conventional GO chemical reduction methods, the presented approach is easy-scalable, operationally simple, and based on the use of a non-toxi...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-32488-x
更新日期:2018-09-20 00:00:00
abstract::Innate immunity is induced when pathogen-associated molecular patterns (PAMPs) bind host pattern recognition receptors (PRRs). Polyinosinic:polycytidylic acid [poly(I:C)] is a synthetic analogue of viral dsRNA that acts as a PAMP, inducing type I interferons (IFNs) in vertebrates. In the present study, the immunostimu...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-019-49931-2
更新日期:2019-09-20 00:00:00
abstract::De novo protein sequencing is essential for understanding cellular processes that govern the function of living organisms and all sequence modifications that occur after a protein has been constructed from its corresponding DNA code. By obtaining the order of the amino acids that compose a given protein one can then d...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep25232
更新日期:2016-05-03 00:00:00
abstract::An accurate and efficient solution of the radiative transport equation is proposed for modeling the propagation of photons in the three-dimensional anisotropically scattering half-space medium. The exact refractive index mismatched boundary condition is considered and arbitrary rotationally invariant scattering functi...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep02018
更新日期:2013-01-01 00:00:00