Abstract:
:Engineered protein scaffolds are an alternative to monoclonal antibodies in research and drug design due to their small size, ease of production, versatility, and specificity for chosen targets. One key consideration when engineering such proteins is retaining the original scaffold structure and stability upon insertion of target-binding loops. SQT is a stefin A derived scaffold protein that was used as a model to study possible problems associated with solution behaviour of such aptamers. We used an SQT variant with AU1 and Myc insertion peptides (SQT-1C) to study the effect of peptide insertions on protein structure and oligomerisation. The X-ray structure of monomeric SQT-1C revealed a cystatin-like fold. Furthermore, we show that SQT-1C readily forms dimers and tetramers in solution. NMR revealed that these oligomers are symmetrical, with inserted loops comprising the interaction interface. Two possible mechanisms of oligomerisation are compared using molecular dynamics simulations, with domain swap oligomerisation being thermodynamically favoured. We show that retained secondary structure upon peptide insertion is not indicative of unaltered 3D structure and solution behaviour. Therefore, additional methods should be employed to comprehensively assess the consequences of peptide insertions in all aptamers, particularly as uncharacterized oligomerisation may alter binding epitope presentation and affect functional efficiency.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Zalar M,Indrakumar S,Levy CW,Tunnicliffe RB,Peters GHJ,Golovanov APdoi
10.1038/s41598-019-45565-6subject
Has Abstractpub_date
2019-06-21 00:00:00pages
9067issue
1issn
2045-2322pii
10.1038/s41598-019-45565-6journal_volume
9pub_type
杂志文章abstract::The continuous search for natural products that attenuate age-related losses has increasingly gained notice; among them, those applicable for skin care have drawn significant attention. The bioester generated from the Chenopodium quinoa's oil is a natural-origin ingredient described to produce replenishing skin effect...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-020-76325-6
更新日期:2020-11-10 00:00:00
abstract::Though cognitive function is proven to be an independent predictor of survival in patients with intrinsic brain tumors, cognitive functions are still rarely considered. Aim of this study was to assess neurocognitive function and to identify risk factors for neurocognitive deficits. 103 patients with primary neuroepith...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-17833-w
更新日期:2017-12-19 00:00:00
abstract::Natural competence for genetic transformation refers to the natural ability of various bacteria to take up exogenous DNA from their surroundings and to incorporate internalized genetic information into their genomes. By promoting bacterial diversification and adaptability, this process represents a major driving force...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-019-47423-x
更新日期:2019-07-30 00:00:00
abstract::Onychomycosis (OM) is a common nail disease. Although controversial, vascular diseases are considered independent predictors of OM and vice versa. Sequential pattern mining (SPM) has not been previously used for statistical analysis in dermatology, but it is an efficient method for identifying frequent association rul...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-35909-z
更新日期:2018-12-14 00:00:00
abstract::Tea plant is a typical fluorine (F) accumulator. F concentration in mature tea leaves is several hundred times higher than that in normal field crops. Long-term consumption of teas with high level F will increase the risks of dental and skeletal fluorosis. The mechanism of F accumulation in tea stands unclear. RNA-Seq...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-08587-6
更新日期:2017-08-29 00:00:00
abstract::Sex hormones fluctuate during the menstrual cycle. Evidence from animal studies suggests similar subtle fluctuations in hippocampal structure, predominantly linked to estrogen. Hippocampal abnormalities have been observed in several neuropsychiatric pathologies with prominent sexual dimorphism. Yet, the potential impa...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep32833
更新日期:2016-10-07 00:00:00
abstract::Data on post stroke outcomes in developing countries are scarce due to uncoordinated healthcare delivery systems. In Malaysia, the national stroke clinical practice guideline does not address transfer of care and longer term post stroke care beyond tertiary care. Hence, post stroke care delivery may be delivered at ei...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-36154-0
更新日期:2018-12-19 00:00:00
abstract::The definition of a precise illumination region is essential in many applications where the electromagnetic field should be confined in some specific volume. By using conventional structures, it is difficult to achieve an adequate confinement distance (or volume) with negligible levels of radiation leakage beyond it. ...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep37739
更新日期:2016-11-25 00:00:00
abstract::GLP-1 receptor agonists (GLP-1RA) and SGLT2 inhibitors (SGLT2i) have been associated with improved glycemic control, body weight loss and favorable changes in cardiovascular risk factors and outcomes. We conducted a systematic review and meta-analysis to evaluate the effects of the addition of GLP-1RA to SGLT2i in pat...
journal_title:Scientific reports
pub_type: 杂志文章,meta分析
doi:10.1038/s41598-019-55524-w
更新日期:2019-12-18 00:00:00
abstract::In many ways, the complement of cell subtypes determines the information processing that a local brain circuit can perform. For example, the balance of excitatory and inhibitory (E/I) signaling within a brain region contributes to response magnitude and specificity in ways that influence the effectiveness of informati...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-019-56293-2
更新日期:2019-12-27 00:00:00
abstract::Although there are many reports on the effect of glucose metabolism on oocyte nuclear maturation, there are few studies on its effect on ooplasmic maturation. By manipulating glucose metabolism pathways using a maturation medium that could support oocyte nuclear maturation but only a limited blastocyst formation witho...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep20764
更新日期:2016-02-09 00:00:00
abstract::The vertebrate gut is host to large communities of bacteria, and one of the beneficial contributions of this commensal gut microbiota is the increased nutritional gain from feed components that the host cannot degrade on its own. Fish larvae of similar age and under the same rearing conditions often diverge with regar...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep21192
更新日期:2016-02-15 00:00:00
abstract::One fundamental question in prey luring systems is to understand how visual signals are interpreted by the receiver. Predators lure prey by falsely imitating the signal of a model, or may exploit sensory preferences of the receivers, which search for rewarding signals. Crab spiders reflect ultraviolet (UV) light, ambu...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-09456-y
更新日期:2017-08-23 00:00:00
abstract::In this paper, we propose a novel bio-compatible organic humidity sensor based on natural inner egg shell membrane (IESM) with multilayer cross linked fiber structure that can be used as a substrate as well as a sensing active layer. To fabricate the proposed sensors, two different size inter digital electrodes (IDEs)...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-019-42337-0
更新日期:2019-04-09 00:00:00
abstract::The celebrated Jordan-Wigner transformation provides an efficient mapping between spin chains and fermionic systems in one dimension. Here we extend this spin-fermion mapping to arbitrary tree structures, which enables mapping between fermionic and spin systems with nearest-neighbor coupling. The mapping is achieved w...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-38128-8
更新日期:2019-02-22 00:00:00
abstract::Inspired by adhesive mussel proteins, nanospherical self-assemblies were prepared from bolaamphiphiles containing 3,4-dihydroxyphenylalanine (DOPA) moieties, and a suspension of the bolaamphiphile assemblies was used for the preparation of a patterned surface that enhanced cell adhesion and viability. The abundant sur...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-14249-4
更新日期:2017-10-23 00:00:00
abstract::Tunicates are marine invertebrates that compose the closest phylogenetic group to the vertebrates. These chordates present a particularly diverse range of regenerative abilities and life-history strategies. Consequently, tunicates provide an extraordinary perspective into the emergence and diversity of these traits. H...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-23749-w
更新日期:2018-04-03 00:00:00
abstract::The interaction between roots and bacterial communities in halophytic species is poorly understood. Here, we used Jerusalem artichoke cultivar Nanyu 1 (NY-1) to characterise root distribution patterns and determine diversity and abundance of bacteria in the rhizosphere soil under variable salinity. Root growth was not...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep20687
更新日期:2016-02-08 00:00:00
abstract::Sacrospinous ligament fixation (SSLF) is one of the most utilized surgeries in the management of pelvic organ prolapse (POP). We conducted a large-series study of SSLF in a tertiary center by an experienced urogynecologic team. The 453 women with POP who underwent SSLF at National Taiwan University Hospital in the per...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-020-61995-z
更新日期:2020-03-19 00:00:00
abstract::Heterostructures based on two-dimensional (2D) materials have sparked wide interests in both fundamental physics and applied devices. Recently, Dirac/Weyl semimetals are emerging as capable functional materials for optoelectronic devices. However, thus far the interfacial coupling of an all-semimetal 2D heterostructur...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-29717-8
更新日期:2018-08-27 00:00:00
abstract::Olive oil pomace (OOP) is a bio-waste rich in highly soluble polyphenols. OOP has been proposed as an additive in ruminant feeding to modulate rumen fermentations. Three groups of ewes were fed the following different diets: a control diet and two diets supplemented with OOP, obtained with a two-phase (OOP2) or three-...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-26713-w
更新日期:2018-05-31 00:00:00
abstract::To study the influence of the position of the double bond and ring size on the stability of hydrogen bonded complexes, the 1:1 complexes formed between 2,2,2-trifluoroethanol (TFE) and three heterocyclic compounds including 2,3-dihydrofuran (2,3-DHF), 2,5-dihydrofuran (2,5-DHF) and 3,4-dihydropyran (3,4-DHP) were inve...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-11921-7
更新日期:2017-09-12 00:00:00
abstract::Taking advantage of the magnetoelectric and its inverse effect, this article demonstrates strain-mediated magnetoelectric write and read operations simultaneously in Co60Fe20B20/Pb(Mg1/3Nb2/3)0.7Ti0.3O3 heterostructures based on a pseudo-magnetization µ ≡ mx2 - my2. By applying an external DC-voltage across a (011)-cu...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-020-67776-y
更新日期:2020-07-01 00:00:00
abstract::In earlier studies, we showed that ATF4 down-regulation affects post-synaptic development and dendritic spine morphology in neurons through increased turnover of the Rho GTPase Cell Division Cycle 42 (Cdc42) protein. Here, we find that ATF4 down-regulation in both hippocampal and cortical neuron cultures reduces prote...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep36952
更新日期:2016-11-14 00:00:00
abstract::Biological sulfate-reducing bacteria (SRB) may be effective in removing toxic lead and mercury ions (Pb(II) and Hg(II)) from wet flue gas desulfurization (FGD) wastewater through anaerobic sulfite reduction. To confirm this hypothesis, a sulfite-reducing up-flow anaerobic sludge blanket reactor was set up to treat FGD...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep30455
更新日期:2016-07-26 00:00:00
abstract::Glioblastoma (GBM) is the most prevalent and lethal type of primary malignant brain tumour. Recent studies suggest that the discovery of human cytomegalovirus (HCMV)-encoded microRNAs (miRNAs) might play a role in the pathogenesis of diseases, including GBM. In this study, we aimed to analyse the expression and functi...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep44705
更新日期:2017-03-17 00:00:00
abstract::Maoto, a traditional Japanese Kampo medicine, has been used to treat various respiratory diseases, including respiratory infections and influenza. Ephedrine (EPD), the main ingredient in maoto, is also clinically used to treat respiratory diseases. However, the pharmacokinetics and distribution of EPD in the lungs aft...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep44098
更新日期:2017-03-08 00:00:00
abstract::Echovirus 11 (E-11) is one of the most frequently isolated enteroviruses causing meningitis and other diseases such as hand, foot, and mouth disease (HFMD) and acute flaccid paralysis (AFP). Fifty-nine newly determined E-11 VP1 sequences from the China AFP and HFMD surveillance network and 500 E-11 VP1 sequences obtai...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-019-46870-w
更新日期:2019-07-22 00:00:00
abstract::High-throughput sequencing was applied to analyze the effects of toxic Microcystis aeruginosa on the silver carp Hypophthalmichthys molitrix. Silver carps were exposed to two cyanobacteria species (toxic and non-toxic) for RNA-seq and miRNA-seq analysis. RNA-seq revealed that the liver tissue contained 105,379 unigene...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-10335-9
更新日期:2017-09-05 00:00:00
abstract::We wanted to determine whether subjective sleep disturbance was associated with serum glycated hemoglobin (HbA1c) in people with type 2 diabetes mellitus. In total, 944 randomly-selected people with diabetes completed the Chinese version of the Pittsburgh Sleep Quality Index (PSQI). Participants' glycaemia was assesse...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-019-50814-9
更新日期:2019-10-03 00:00:00