Stereodiscrimination of guests in chiral organosilica aerogels studied by ESR spectroscopy

• Sebastian Polarz,
• Yasar Krysiak,
• Martin Wessig and
• Florian Kuhlmann

Beilstein J. Nanotechnol. 2025, 16, 2034–2054, doi:10.3762/bjnano.16.140

• diffusion coefficients [44]. In the mentioned studies, we have always used racemic 3CP containing both enantiomers. Because of our previous work on mesoporous organosilica materials containing chiral groups [47][48], particularly amino acid derivatives [49], we became interested in observing the two

• materials made of amino acid-functionalized organosilica. It is organized as follows: First, we present a set of materials that differ in their chemical architecture. We then use ESR spectroscopy for investigating the dynamics of (+)-3CP and (−)-3CP for determining stereodiscrimination. The situation will

• developed. For instance, serine (Ser) or alanine (Ala) can be attached to NHxSIL via amid bonds using a fluorenylmethyloxycarbonyl (Fmoc)-protected amino acid, followed by detachment of the protection group (see Experimental section and Supporting Information File 1, Figure S4). Alternatively, one can

The cement of the tube-dwelling polychaete Sabellaria alveolata: a complex composite adhesive material

• Emilie Duthoo,
• Aurélie Lambert,
• Pierre Becker,
• Carla Pugliese,
• Jean-Marc Baele,
• Arnaud Delfairière,
• Matthew J. Harrington and
• Patrick Flammang

Beilstein J. Nanotechnol. 2025, 16, 1998–2014, doi:10.3762/bjnano.16.138

• translated and analyzed in silico. Molecular weight and theoretical pI were computed using the ProtParam tool (https://web.expasy.org/protparam/) [27], and amino acid composition was analyzed using SAPS (https://www.ebi.ac.uk/jdispatcher/seqstats/saps) [28]. The presence of a signal peptide was predicted

• protein. This protein is polybasic, with 8.6% of its amino acid composition corresponding to histidine (Supporting Information File 1, Table S5). Its corresponding mRNA is highly expressed in the transcriptome (Table 1). Another adhesive protein was also identified, encoded by transcript

• other species retrieved from the NCBI database was therefore conducted. From this analysis, five transcripts were obtained, and their translated protein sequences, named SaFAM20C-1 to -5 (Table 1), were analyzed to look for the signature amino acid features characteristic of FAM20 kinases [22]. These

Self-assembly and adhesive properties of Pollicipes pollicipes barnacle cement protein cp19k: influence of pH and ionic strength

• Shrutika Sawant,
• Anne Marie Power and
• J. Gerard Wall

Beilstein J. Nanotechnol. 2025, 16, 1863–1872, doi:10.3762/bjnano.16.129

• secreted by the foot [4]. Each thread ends in an adhesive plaque composed of mussel foot proteins (Mfps), which are rich in the modified amino acid ʟ-3,4-dihydroxyphenylalanine (DOPA) [5]. DOPA is formed via post-translational hydroxylation of tyrosine and mediates wet surface adhesion through hydrogen

• produced Balanus albicostatus cp19k protein from which cysteine residues had been removed reported the formation of fibrils only under seawater-mimicking conditions (pH 8.0, high salt concentration) and not in an acidic environment [31]. While the modified amino acid sequence may have impacted the protein

Exploring the potential of polymers: advancements in oral nanocarrier technology

• Rousilândia de Araujo Silva,
• Igor Eduardo Silva Arruda,
• Luise Lopes Chaves,
• Mônica Felts de La Roca Soares and
• Jose Lamartine Soares Sobrinho

Beilstein J. Nanotechnol. 2025, 16, 1751–1793, doi:10.3762/bjnano.16.122

• ]. Zein’s amino acid composition contributes to its insolubility in water, except under specific conditions, such as in the presence of high concentrations of urea, alcohol, anionic surfactants, or at high pH levels (≥11). Its hydrophobicity and solubility profile make zein an attractive nanocarrier as it

Advances of aptamers in esophageal cancer diagnosis, treatment and drug delivery

• Yang Fei,
• Hui Xu,
• Chunwei Zhang,
• Jingjing Wang and
• Yong Jin

Beilstein J. Nanotechnol. 2025, 16, 1734–1750, doi:10.3762/bjnano.16.121

• targeting Mycoplasma hyorhinis and aptamers targeting SPP1 (Table 2). 4.1 Peptide aptamers targeting SOX2 protein or its binding partners Peptide aptamers consist of amino acid sequences and can be screened by yeast two-hybrid [65], phage display [66], or molecular docking prediction techniques [67]. The

Ferroptosis induction by engineered liposomes for enhanced tumor therapy

• Alireza Ghasempour,
• Mohammad Amin Tokallou,
• Mohammad Reza Naderi Allaf,
• Mohsen Moradi,
• Hamideh Dehghan,
• Mahsa Sedighi,
• Mohammad-Ali Shahbazi and
• Fahimeh Lavi Arab

Beilstein J. Nanotechnol. 2025, 16, 1325–1349, doi:10.3762/bjnano.16.97

• , IRPs induce the expression of iron-enhancing proteins by binding to IREs. The induction of IRPs is associated with a stimulation of ferroptosis [59][61][62]. 2.1.3 Amino acid-mediated pathway. Glutamine and the system xc− are effective in producing lipids and the production of the antioxidant GSH [63

• ), is necessary for the growth of mammalian cells [65]. The need for this amino acid can be prevented by vitamin E with antioxidant function [66]. As a result, the role of cysteine in the regeneration of GSH with antioxidant function has been determined [67]. Cysteine can be produced intracellularly in

• some cells, such as fibroblasts, macrophages, hepatocytes, and vascular smooth muscle cells, from the amino acid methionine. Still, most cells, including cancer cells, cannot produce endogenous cysteine [68][69][70]. A range of delivery mechanisms contribute to supplying cells with the cysteine they

Synthetic-polymer-assisted antisense oligonucleotide delivery: targeted approaches for precision disease treatment

• Ana Cubillo Alvarez,
• Dylan Maguire and
• Ruairí P. Brannigan

Beilstein J. Nanotechnol. 2025, 16, 435–463, doi:10.3762/bjnano.16.34

• results indicated that PEG-PLO not only facilitated effective tumour suppression but also prolonged survival in treated mice without causing severe toxicity. Poly(ʟ-arginine). Poly(ʟ-arginine) (PLR) is a cationic polypeptide composed of repeating units of the amino acid ʟ-arginine (Figure 5). Thanks to

• delivery in tumour therapy. Poly(ʟ-glutamic acid). Poly(ʟ-glutamic acid) (PLG) is a biodegradable, water-soluble synthetic polymer composed of repeating units of the amino acid ʟ-glutamic acid. Owing to the presence of the carboxyl side chains, PLG is anionic under physiological conditions (pH ≈ 7.4). This

Green synthesis of silver nanoparticles derived from algae and their larvicidal properties to control Aedes aegypti

• Matheus Alves Siqueira de Assunção,
• Douglas Dourado,
• Daiane Rodrigues dos Santos,
• Gabriel Bezerra Faierstein,
• Mara Elga Medeiros Braga,
• Severino Alves Junior,
• Rosângela Maria Rodrigues Barbosa,
• Herminio José Cipriano de Sousa and
• Fábio Rocha Formiga

Beilstein J. Nanotechnol. 2024, 15, 1566–1575, doi:10.3762/bjnano.15.123

• found were amino acid residues, aromatic rings, geminal methyls, ether linkages, flavones, terpenoids, aliphatic amines, and alcohols/phenols. AgNPs were synthesized from an extract of the brown alga S. natans [53]. The extract was obtained via hot Soxhlet extraction of crushed leaves (40 °C) using

Nanotechnological approaches for efficient N2B delivery: from small-molecule drugs to biopharmaceuticals

• Selin Akpinar Adscheid,
• Akif E. Türeli,
• Nazende Günday-Türeli and
• Marc Schneider

Beilstein J. Nanotechnol. 2024, 15, 1400–1414, doi:10.3762/bjnano.15.113

• treating glioblastoma [161]. The delivery of RNA can also be increased by functionalization. One of the most popular functionalization choices is a 29 amino-acid peptide derived from the rabies virus glycoprotein (RVG29) as it enhances brain targeting [162]. Therefore, researchers combined RVG29 and RNA

Electrospun polysuccinimide scaffolds containing different salts as potential wound dressing material

• Veronika Pálos,
• Krisztina S. Nagy,
• Rita Pázmány,
• Krisztina Juriga-Tóth,
• Bálint Budavári,
• Judit Domokos,
• Dóra Szabó,
• Ákos Zsembery and
• Angela Jedlovszky-Hajdu

Beilstein J. Nanotechnol. 2024, 15, 781–796, doi:10.3762/bjnano.15.65

• , USA); Dulbecco's modified Eagle medium (DMEM, Gibco, USA); MEM, no glutamine, no phenol red (Gibco, USA); phosphate-buffered saline (Gibco, USA); fetal bovine serum (FBS, Gibco, USA); penicillin/streptomycin mix (Gibco, USA); ʟ-glutamine (Gibco, USA); non-essential amino acid solution (NEAA, Gibco

Exploring the relationships between physiochemical properties of nanoparticles and cell damage to combat cancer growth using simple periodic table-based descriptors

• Joyita Roy and
• Kunal Roy

Beilstein J. Nanotechnol. 2024, 15, 297–309, doi:10.3762/bjnano.15.27

• to mispairing with adenine, resulting in transversion mutations. Proteins can also be damaged when their amino acid side chains are oxidized by ROS. Exposure of lipids to ROS can result in lipid peroxidation, which can cause cell damage and generate reactive by-products that further damage the cell

• hydroxyl radicals, resulting in oxidative damage to proteins. Moreover, they can bind non-specifically to amino acid residues and replace existing metal ions at active sites of enzymes, leading to abnormal protein folding. Protein aggregation diseases are a type of neurodegenerative diseases that occur

Assessing phytotoxicity and tolerance levels of ZnO nanoparticles on Raphanus sativus: implications for widespread adoptions

• Pathirannahalage Sahan Samuditha,
• Nadeesh Madusanka Adassooriya and
• Nazeera Salim

Beilstein J. Nanotechnol. 2024, 15, 115–125, doi:10.3762/bjnano.15.11

• content in olive tree (cv. Moraiolo) shoots in vitro was reported upon treatment with ZnO NPs at concentrations of 6 and 18 mg/L [35]. Zinc is essential for the synthesis of tryptophan, an amino acid required for the biosynthesis of IAA. Zinc has an indirect influence on auxins by activating tryptophan

Berberine-loaded polylactic acid nanofiber scaffold as a drug delivery system: The relationship between chemical characteristics, drug-release behavior, and antibacterial efficiency

• Le Thi Le,
• Hue Thi Nguyen,
• Liem Thanh Nguyen,
• Huy Quang Tran and
• Thuy Thi Thu Nguyen

Beilstein J. Nanotechnol. 2024, 15, 71–82, doi:10.3762/bjnano.15.7

• mechanism of BBR against a standard strain Staphylococcus aureus, whereby BBR inhibits the synthesis of the cell wall and an aromatic amino acid induces oxidative damage and decreases stress resistance. Besides, BBR was found to inhibit MRSA biofilm formation with the concentration in the range of 1–64 mg/L

Curcumin-loaded albumin submicron particles with potential as a cancer therapy: an in vitro study

• Nittiya Suwannasom,
• Netsai Sriaksorn,
• Chutamas Thepmalee,
• Krissana Khoothiam,
• Ausanai Prapan,
• Hans Bäumler and
• Chonthida Thephinlap

Beilstein J. Nanotechnol. 2023, 14, 1127–1140, doi:10.3762/bjnano.14.93

• due to the preparation process, which involves cross-linking of amino acid residues in proteins by glutaraldehyde (GA). As shown in Figure 3B, HSA retained its secondary structure, while both HSA-MPs and CUR-HSA-MPs lost their peptide bonds and secondary structure. The lack of secondary structure of

• both HSA-MPs and CUR-HSA-MPs is attributed to the cross-linking reaction that utilizes amino acid residues, leading to the destruction of the secondary structure [37]. Influence of the CUR concentration in the suspension medium on the CUR-loading capacities The surface chemical properties of MnCO3-HSA

New trends in nanobiotechnology

• Pau-Loke Show,
• Kit Wayne Chew,
• Wee-Jun Ong,
• Sunita Varjani and
• Joon Ching Juan

Beilstein J. Nanotechnol. 2023, 14, 377–379, doi:10.3762/bjnano.14.32

• biocompatibility of the nanomaterials is also discussed. The thematic issue also recorded a work on the topic of “Self-assembly of amino acids toward functional biomaterials” [5], where the role of biomaterials in nanobiotechnology is discussed. In this review, the latest advances in amino acid self-assembly and

• properties associated with the process and yielded products are highlighted. The self-assembly methods in focus included single amino acid self-assembly, functional amino acid self-assembly, amino acid and metal ion coordination self-assembly, and amino acid regulatory functional molecule self-assembly. Many

Biocatalytic synthesis and ordered self-assembly of silica nanoparticles via a silica-binding peptide

• Mustafa Gungormus

Beilstein J. Nanotechnol. 2023, 14, 280–290, doi:10.3762/bjnano.14.25

• synthesis and assembly of SiO2 nanoparticles into gels or opal-like ordered structures. Experimental Synthesis of the peptide The SiBP was commercially synthesized (Genscript, NJ, USA) at <98% purity via 9-fluorenylmethoxycarbonyl (F-moc) chemistry methods. The amino acid sequence and physicochemical

• -range homogeneity of self-assembly of as-synthesized SiO2 particles formed with NH3 alone and NH3 + 1 mM SiBP. Amino acid sequence and physicochemical properties of the SiBP. Reaction contents for the different conditions studied. Supporting Information Supporting Information features mass spectra of

Cyclodextrins as eminent constituents in nanoarchitectonics for drug delivery systems

• Makoto Komiyama

Beilstein J. Nanotechnol. 2023, 14, 218–232, doi:10.3762/bjnano.14.21

• pressure regulation (Asp-Arg-Val-Tyr-Ile-His-Pro-Phe) was precisely recognized by a molecularly imprinted β-CyD polymer [113]. Surprisingly, a difference of only one amino acid is clearly differentiated. Apparently, the solution conformation of the oligopeptide, rather than its primary structure, is

Enhanced electronic transport properties of Te roll-like nanostructures

• E. R. Viana,
• N. Cifuentes and
• J. C. González

Beilstein J. Nanotechnol. 2022, 13, 1284–1291, doi:10.3762/bjnano.13.106

• chemical composition of the nanostructures. This morphology has not been reported for the hydrothermal synthesis of Te nanostructures. Though, similar morphologies have been observed in Te scroll-like nanostructures grown by reflux processes [20] or Te shuttle-like scrolled nanostructures produced by amino

• acid-controlled hydrothermal growth [21]. However, the typical seed at the center of the scroll-like nanostructures grown by reflux processes was not observed in our case, nor was the characteristic sharp tip at both ends of the shuttle-like scrolled Te NTs. Figure 2 shows TEM images and the

Design of surface nanostructures for chirality sensing based on quartz crystal microbalance

• Yinglin Ma,
• Xiangyun Xiao and
• Qingmin Ji

Beilstein J. Nanotechnol. 2022, 13, 1201–1219, doi:10.3762/bjnano.13.100

• serum albumin (RbSA) for real-time chiral recognition of five pairs of enantiomers [32]. Although SAs of different species have similar structures with 70–80% identical amino acid sequences, they showed different chiral recognition abilities. For example, the maximum chiral recognition degree αQCM of

• typical hydrogen bonds with the amino acid residues of SA molecules. Based on the QCM responses of naproxen (Nap) recognition on the BSA selector layer, Guo et al. studied the chiral adsorption forces by cyclic voltammograms (CVs) [33]. The result showed the formation of a larger electron transfer

• amino acids in the presence of other amino acid interferences. The resultant sensing system has also the advantages of being simple, reusable, and can be easily manipulated for enantioselective sensing assays. Rational selection of chiral ligands is the key factor for successful chirality detection by

Green synthesis of zinc oxide nanoparticles toward highly efficient photocatalysis and antibacterial application

• Vo Thi Thu Nhu,
• Nguyen Duy Dat,
• Le-Minh Tam and
• Nguyen Hoang Phuong

Beilstein J. Nanotechnol. 2022, 13, 1108–1119, doi:10.3762/bjnano.13.94

• bacterial cell membranes, inhibiting amino acid metabolism and disrupting the bacterial cell enzymatic system [43][44][45]. Conclusion ZnO nanoparticles were synthesized by a green method using rosin extracted from Pinus latteri trees in Vietnam. The XRD diagram of synthesized ZnO showed that ZnO has the

Biomimetic chitosan with biocomposite nanomaterials for bone tissue repair and regeneration

• Se-Kwon Kim,
• Sesha Subramanian Murugan,
• Pandurang Appana Dalavi,
• Sebanti Gupta,
• Sukumaran Anil,
• Gi Hun Seong and
• Jayachandran Venkatesan

Beilstein J. Nanotechnol. 2022, 13, 1051–1067, doi:10.3762/bjnano.13.92

• inside the bone extracellular matrix is produced by bone-forming osteoblasts with a repeating amino acid sequence of [Gly(glycine)–X–Y]n, where X and Y may be proline and hydroxyproline. Collagen fibrils, composed of specific proteins, are usually responsible for mechanical strength. Furthermore

Bioselectivity of silk protein-based materials and their bio-inspired applications

• Hendrik Bargel,
• Vanessa T. Trossmann,
• Christoph Sommer and
• Thomas Scheibel

Beilstein J. Nanotechnol. 2022, 13, 902–921, doi:10.3762/bjnano.13.81

• collagens, laminins, fibronectin, and elastin, which contain several short peptide recognition and binding motifs in their amino acid sequence for interaction with specific cellular surface integrins or other types of receptors [23]. Within the ECM, fibronectin is the best-known attachment site for cells by

• its minimum inhibitory concentration (MIC) for planktonic organisms [94], and, subsequently, it was demonstrated that a distinct subset of HDP peptides can be addressed specifically as antibiofilm peptides, with similar overall amino acid compositions but distinct structure–activity relationships

• compared to those of antimicrobial peptides [95]. As a result of the multiple functionalities of HDPs, several amphiphilic antimicrobial molecules have recently been developed mimicking both structure and functional aspects of the antimicrobial peptides, such as all-ᴅ amino acid peptides [96], β-peptides

DNA aptamer selection and construction of an aptasensor based on graphene FETs for Zika virus NS1 protein detection

• Nathalie B. F. Almeida,
• Thiago A. S. L. Sousa,
• Viviane C. F. Santos,
• Camila M. S. Lacerda,
• Thais G. Silva,
• Rafaella F. Q. Grenfell,
• Flavio Plentz and
• Antero S. R. Andrade

Beilstein J. Nanotechnol. 2022, 13, 873–881, doi:10.3762/bjnano.13.78

• replication [4]. The glycoprotein NS1 is a 352-amino-acid polypeptide, which has a molecular weight of 46–55 kDa (depending on its glycosylation status), and is essential in viral replication contributing to different stages of the virus life cycle. The NS1 protein is found at high levels in the blood of

Design and selection of peptides to block the SARS-CoV-2 receptor binding domain by molecular docking

• Kendra Ramirez-Acosta,
• Ivan A. Rosales-Fuerte,
• J. Eduardo Perez-Sanchez,
• Alfredo Nuñez-Rivera,
• Josue Juarez and
• Ruben D. Cadena-Nava

Beilstein J. Nanotechnol. 2022, 13, 699–711, doi:10.3762/bjnano.13.62

• entry of SARS-CoV-2 into cells is mediated by the interaction of the RBD with the host cell ACE2 receptor [2][3][5]. Figure 1 shows the RBD–ACE2 complex formed at the first stage of the cellular infection by SARS-CoV-2. The formation of the RBD–ACE2 complex is mediated by the amino acid residues F486

• region). APD peptides were selected based on an already known antiviral activity (Table S1, Supporting Information File 1). ADV results showed that both peptides from the APD and theoretical peptides have the capability to dock on the RBD active region, blocking the amino acid residues related to the

• ]. From this, new theoretical peptides were designed, considering the most common amino acid residues involved in the formation of hydrogen bonds to the RBD active region of SARS-CoV-2. These small peptides may reinforce and enhance the effectiveness of the immune system response before and after the

Stimuli-responsive polypeptide nanogels for trypsin inhibition

• Petr Šálek,
• Jana Dvořáková,
• Sviatoslav Hladysh,
• Diana Oleshchuk,
• Ewa Pavlova,
• Jan Kučka and
• Vladimír Proks

Beilstein J. Nanotechnol. 2022, 13, 538–548, doi:10.3762/bjnano.13.45

• PHEG-Tyr (Figure 6a, crosses) was tested. Interestingly, it was found that these polypeptide nanogels also showed an inhibition effect on trypsin. The results indicate that these nanogels synthesized from Nα-Lys-NG or PHEG-Tyr polypeptide precursors, in other words from synthetic poly(amino acid)s