The protein journal最新文献

筛选
英文 中文
Sulfonylhydrazide Derivatives as Potential Anti-cancer Agents: Synthesis, In Vitro and In Silico Studies. 作为潜在抗癌剂的磺酰肼衍生物:合成、体外和硅学研究。
The protein journal Pub Date : 2024-09-21 DOI: 10.1007/s10930-024-10232-x
Kholoud M Ibrahim, Doaa M Elsisi, Yousry A Ammar, Fivian F M Araki, Jehane A A Micky
{"title":"Sulfonylhydrazide Derivatives as Potential Anti-cancer Agents: Synthesis, In Vitro and In Silico Studies.","authors":"Kholoud M Ibrahim, Doaa M Elsisi, Yousry A Ammar, Fivian F M Araki, Jehane A A Micky","doi":"10.1007/s10930-024-10232-x","DOIUrl":"https://doi.org/10.1007/s10930-024-10232-x","url":null,"abstract":"<p><p>The synthesis of new agents for cancer treatment persists due to its global lethality. A series of thirteen derivatives, namely salicylic acid-5-sulfohydrazide (SA-SH) analogs, were designed and synthesized from 5-(chlorosulfonyl)-2-hydroxybenzoic acid via nucleophilic substitution reaction with different acid hydrazides, thiocarbohydrazide & thiosemicarbazide scaffolds. Confirmation of the designed derivative's structures employed various spectroscopic techniques (FT-IR and NMR) and elemental analysis. The newly synthesized synthons were evaluated for cytotoxic activity against HepG-2 and HCT-116 cell lines in comparison to Doxorubicin. Notably, SA-SH derivatives (5, 7, 8a, 8b and 11) exhibited significantly higher efficacy against HepG-2 and HCT-116 cell lines than other analogs. Furthermore, compound (8a) demonstrated a superior activity against HepG-2 cell lines with IC<sub>50</sub> values of 3.99 ± 0.2 μM than the reference drug, Doxorubicin, (IC<sub>50</sub> HepG-2 = 4.50 ± 0.2 µM). The molecular docking simulation of the most active SA-SH derivatives and the reference drug doxorubicin into the active site of FGFR4 (fibroblast growth factor receptor, the predominant isoform expressed in human hepatocytes) (PDB ID: 6V9C) proved the usefulness of hybridizing salicylic scaffold with SO<sub>2</sub> and hydrazide moieties as a promising approach in designing new anticancer agents. Finally, ADME and drug-likeness features of the most active compounds compared to positive controls were investigated to increase the success possibilities in clinical trials and they were found to be promising candidates for further investigation and development as drugs.</p>","PeriodicalId":94249,"journal":{"name":"The protein journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142305338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characterization of Cationic Amino Acid Binding Protein from Candidatus Liberibacter Asiaticus and in Silico Study to Identify Potential Inhibitor Molecules. 亚洲自由杆菌阳离子氨基酸结合蛋白的特征及确定潜在抑制分子的硅学研究
The protein journal Pub Date : 2024-09-21 DOI: 10.1007/s10930-024-10233-w
Sapna Lonare, Deena Nath Gupta, Harry Kaur, Surabhi Rode, Shalja Verma, Mrugendra Gubyad, Dilip Kumar Ghosh, Pravindra Kumar, Ashwani Kumar Sharma
{"title":"Characterization of Cationic Amino Acid Binding Protein from Candidatus Liberibacter Asiaticus and in Silico Study to Identify Potential Inhibitor Molecules.","authors":"Sapna Lonare, Deena Nath Gupta, Harry Kaur, Surabhi Rode, Shalja Verma, Mrugendra Gubyad, Dilip Kumar Ghosh, Pravindra Kumar, Ashwani Kumar Sharma","doi":"10.1007/s10930-024-10233-w","DOIUrl":"https://doi.org/10.1007/s10930-024-10233-w","url":null,"abstract":"<p><p>Cationic amino acid binding protein (CLasArgBP), one of the two amino acid binding receptor in Candidatus Liberibacter asiaticus (CLas), is predominately expressed in citrus psyllids as a part of ATP-binding cassette transport system. The present study describes characterization of CLasArgBP by various biophysical techniques and in silico study, to identify potential inhibitor molecules against CLasArgBP through virtual screening and MD simulations. Further, in planta study was carried out to assess the effect of selected inhibitors on Huanglongbing infected Mosambi plants. The results showed that CLasArgBP exhibits pronounced specificity for arginine, histidine and lysine. Surface plasmon resonance (SPR) study reports highest binding affinity for arginine (Kd, 0.14 µM), compared to histidine and lysine (Kd, 15 µΜ and 26 µΜ, respectively). Likewise, Differential Scanning Calorimetry (DSC) study showed higher stability of CLasArgBP for arginine, compared to histidine and lysine. N(omega)-nitro-L-arginine, Gamma-hydroxy-L-arginine and Gigartinine emerged as lead compounds through in silico study displaying higher binding energy and stability compared to arginine. SPR reports elevated binding affinities for N(omega)-nitro-L-arginine and Gamma-hydroxy-L-arginine (Kd, 0.038 µΜ and 0.061 µΜ, respectively) relative to arginine. DSC studies showed enhanced thermal stability for CLasArgBP in complex with selected inhibitors. Circular dichroism and fluorescence studies showed pronounced conformational changes in CLasArgBP with selected inhibitors than with arginine. In planta study demonstrated a substantial decrease in CLas titer in treated plants as compared to control plants. Overall, the study provides the first comprehensive characterization of cationic amino acid binding protein from CLas, as a potential drug target to manage HLB disease.</p>","PeriodicalId":94249,"journal":{"name":"The protein journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142305337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prediction of Solubility of Proteins in Escherichia coli Based on Functional and Structural Features Using Machine Learning Methods. 利用机器学习方法,基于功能和结构特征预测蛋白质在大肠杆菌中的溶解度
The protein journal Pub Date : 2024-09-07 DOI: 10.1007/s10930-024-10230-z
Feiming Huang, Qian Gao, XianChao Zhou, Wei Guo, KaiYan Feng, Lin Zhu, Tao Huang, Yu-Dong Cai
{"title":"Prediction of Solubility of Proteins in Escherichia coli Based on Functional and Structural Features Using Machine Learning Methods.","authors":"Feiming Huang, Qian Gao, XianChao Zhou, Wei Guo, KaiYan Feng, Lin Zhu, Tao Huang, Yu-Dong Cai","doi":"10.1007/s10930-024-10230-z","DOIUrl":"https://doi.org/10.1007/s10930-024-10230-z","url":null,"abstract":"<p><p>Protein solubility is a critical parameter that determines the stability, activity, and functionality of proteins, with broad and far-reaching implications in biotechnology and biochemistry. Accurate prediction and control of protein solubility are essential for successful protein expression and purification in research and industrial settings. This study gathered information on soluble and insoluble proteins. In characterizing the proteins, they were mapped to STRING and characterized by functional and structural features. All functional/structural features were integrated to create a 5768-dimensional binary vector to encode proteins. Seven feature-ranking algorithms were employed to analyze the functional/structural features, yielding seven feature lists. These lists were subjected to the incremental feature selection, incorporating four classification algorithms, one by one to build effective classification models and identify functional/structural features with classification-related importance. Some essential functional/structural features used to differentiate between soluble and insoluble proteins were identified, including GO:0009987 (intercellular communication) and GO:0022613 (ribonucleoprotein complex biogenesis). The best classification model using support vector machine as the classification algorithm and 295 optimized functional/structural features generated the F1 score of 0.825, which can be a powerful tool to differentiate soluble proteins from insoluble proteins.</p>","PeriodicalId":94249,"journal":{"name":"The protein journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142147269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploring Acyl Thiotriazinoindole Based Pharmacophores: Design, Synthesis, and SAR Studies with Molecular Docking and Biological Activity Profiling against Urease, α-amylase, α-glucosidase, Antimicrobial, and Antioxidant Targets. 探索酰基硫代三嗪吲哚类药物:针对脲酶、α-淀粉酶、α-葡萄糖苷酶、抗菌剂和抗氧化剂靶点的设计、合成和 SAR 研究,以及分子对接和生物活性分析。
The protein journal Pub Date : 2024-09-02 DOI: 10.1007/s10930-024-10229-6
Mian Bilal Haider, Aamer Saeed, Atteeque Ahmed, Muhammad Azeem, Hammad Ismail, Sabba Mehmood, Parham Taslimi, Syed Adnan Ali Shah, Madiha Irfan, Hesham R El-Seedi
{"title":"Exploring Acyl Thiotriazinoindole Based Pharmacophores: Design, Synthesis, and SAR Studies with Molecular Docking and Biological Activity Profiling against Urease, α-amylase, α-glucosidase, Antimicrobial, and Antioxidant Targets.","authors":"Mian Bilal Haider, Aamer Saeed, Atteeque Ahmed, Muhammad Azeem, Hammad Ismail, Sabba Mehmood, Parham Taslimi, Syed Adnan Ali Shah, Madiha Irfan, Hesham R El-Seedi","doi":"10.1007/s10930-024-10229-6","DOIUrl":"https://doi.org/10.1007/s10930-024-10229-6","url":null,"abstract":"<p><p>A diminutive chemical library of acyl thiotriazinoindole (ATTI) based bioactive scaffolds was synthesized, instigated by taking the economical starting material Isatin, through a series of five steps. Isatin was first nitrated followed by the attachment of pentyl moiety via nucleophilic substitution reaction. The obtained compound was reacted with thiosemicarbazide to obtain thiosemicarbazone derivative, which was eventually cyclized using basic conditions in water as solvent. Finally, the reported series was obtained through reaction of nitrated thiotriazinoindole moiety with differently substituted phenacyl bromides. The synthesized compounds were characterized using NMR spectroscopy and elemental analysis. Finally, the synthesized motifs were scrutinized for their potential to impede urease, α-glucosidase, DPPH, and α-amylase. Compound 5 h with para cyano group manifested the most pivotal biological activity among all, displaying IC<sub>50</sub> values of 29.7 ± 0.8, 20.5 ± 0.5 and 36.8 ± 3.9 µM against urease, α-glucosidase, and DPPH assay, respectively. Simultaneously, for α-amylase compound 5 g possessing a p-CH<sub>3</sub> at phenyl ring unfolded as most active, with calculated IC<sub>50</sub> values 90.3 ± 1.1 µM. The scaffolds were additionally gauged for their antifungal and antibacterial activity. Among the tested strains, 5d having bromo as substituent exhibited the most potent antibacterial activity, while it also demonstrated the highest potency against Aspergillus fumigatus. Other derivatives 5b, 5e, 5i, and 5j also exhibited dual inhibition against both antibacterial and antifungal strains. The interaction pattern of derivatives clearly displayed their SAR, and their docking scores were correlated with their IC<sub>50</sub> values. In molecular docking studies, the importance of interactions like hydrogen bonding was further asserted. The electronic factors of various substituents engendered variety of interactions between the ligands and targets implying their importance in the structures of the synthesized heterocyclic scaffolds. To conclude, the synthesized compounds had satisfactory biological activity against various important targets. Further studies are therefore encouraged by attachment of different substitutions in the structure at various positions to enhance the activity of these compounds.</p>","PeriodicalId":94249,"journal":{"name":"The protein journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142116712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dual Antimicrobial and Anticancer Activity of Membrane-Active Peptide BP52. 膜活性肽 BP52 的双重抗菌和抗癌活性
The protein journal Pub Date : 2024-08-27 DOI: 10.1007/s10930-024-10231-y
Hai Bui Thi Phuong, Hoa Doan Ngan, Hue Pham Thi, Binh Nguyen Thi Thanh, Tien T Dang, Thao N T Ho, Tung Truong Thanh, Minh Nguyen Hong, Huy Luong Xuan
{"title":"Dual Antimicrobial and Anticancer Activity of Membrane-Active Peptide BP52.","authors":"Hai Bui Thi Phuong, Hoa Doan Ngan, Hue Pham Thi, Binh Nguyen Thi Thanh, Tien T Dang, Thao N T Ho, Tung Truong Thanh, Minh Nguyen Hong, Huy Luong Xuan","doi":"10.1007/s10930-024-10231-y","DOIUrl":"https://doi.org/10.1007/s10930-024-10231-y","url":null,"abstract":"<p><p>The linear undecapeptide BP52 was previously reported to have antibacterial activity against phytopathogenic bacteria species. Due to the structural similarities to naturally occurring cationic helical antimicrobial peptides, it was speculated that this peptide could potentially target microbial pathogens and cancer cells found in mammals. Consequently, this study aims to further investigate the structural and biological properties of this peptide. Our findings indicate that BP52 exhibits strong antimicrobial and anticancer activity while displaying relatively low levels of hemolytic activity. Hence, this study suggests that BP52 could be a potential lead compound for drug discovery against infectious diseases and cancer. Besides, new insights into the relationships between the structure and the multifunctional properties of antimicrobial peptides were also explored.</p>","PeriodicalId":94249,"journal":{"name":"The protein journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142074915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characterization of the Three DHFRs and K65P Variant: Enhanced Substrate Affinity and Molecular Dynamics Analysis. 三种 DHFR 和 K65P 变体的特征:增强的底物亲和力和分子动力学分析。
The protein journal Pub Date : 2024-08-23 DOI: 10.1007/s10930-024-10228-7
Ruirui Feng, Shuanghao Yang, Xingchu Zhao, Bo Sun, Shengkai Zhang, Qirong Shen, Qun Wan
{"title":"Characterization of the Three DHFRs and K65P Variant: Enhanced Substrate Affinity and Molecular Dynamics Analysis.","authors":"Ruirui Feng, Shuanghao Yang, Xingchu Zhao, Bo Sun, Shengkai Zhang, Qirong Shen, Qun Wan","doi":"10.1007/s10930-024-10228-7","DOIUrl":"https://doi.org/10.1007/s10930-024-10228-7","url":null,"abstract":"<p><p>Dihydrofolate reductase (DHFR) is ubiquitously present in all living organisms and plays a crucial role in the growth of the fungal pathogen R.solani. Sequence alignment confirmed the evolutionary conservation of the essential lid domain, with the amino acid 'P' within the PEKN lid domain appearing with a frequency of 89.5% in higher organisms and 11.8% in lower organisms. Consequently, a K65P variant was introduced into R.solani DHFR (rDHFR). Subsequent enzymatic kinetics assays were conducted for human DHFR (hDHFR), rDHFR, E. coli DHFR (eDHFR), and the K65P variant. hDHFR exhibited the highest k<sub>cat</sub> of 0.95 s<sup>-1</sup>, followed by rDHFR with 0.14 s<sup>-1</sup>, while eDHFR displayed the lowest k<sub>cat</sub> of 0.09 s<sup>-1</sup>. Remarkably, the K65P variant induced a significant reduction in K<sub>m</sub>, resulting in a 1.8-fold enhancement in catalytic efficiency (k<sub>cat</sub>/K<sub>m</sub>) relative to the wild type. Differential scanning fluorimetry and binding free energy calculations confirmed the enhanced substrate affinity for both folate and NADPH in the K65P variant. These results suggest that the K65P mutation enhances substrate affinity and catalytic efficiency in DHFR, highlighting the evolutionary and functional importance of the K65 residue.</p>","PeriodicalId":94249,"journal":{"name":"The protein journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142047693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Identification and Design of Novel Potential Antimicrobial Peptides Targeting Mycobacterial Protein Kinase PknB. 针对分枝杆菌蛋白激酶 PknB 的新型潜在抗菌肽的鉴定和设计
The protein journal Pub Date : 2024-08-01 Epub Date: 2024-07-16 DOI: 10.1007/s10930-024-10218-9
Hemchandra Deka, Atul Pawar, Monishka Battula, Ayman A Ghfar, Mohamed E Assal, Rupesh V Chikhale
{"title":"Identification and Design of Novel Potential Antimicrobial Peptides Targeting Mycobacterial Protein Kinase PknB.","authors":"Hemchandra Deka, Atul Pawar, Monishka Battula, Ayman A Ghfar, Mohamed E Assal, Rupesh V Chikhale","doi":"10.1007/s10930-024-10218-9","DOIUrl":"10.1007/s10930-024-10218-9","url":null,"abstract":"<p><p>Antimicrobial peptides have gradually gained advantages over small molecule inhibitors for their multifunctional effects, synthesising accessibility and target specificity. The current study aims to determine an antimicrobial peptide to inhibit PknB, a serine/threonine protein kinase (STPK), by binding efficiently at the helically oriented hinge region. A library of 5626 antimicrobial peptides from publicly available repositories has been prepared and categorised based on the length. Molecular docking using ADCP helped to find the multiple conformations of the subjected peptides. For each peptide served as input the tool outputs 100 poses of the subjected peptide. To maintain an efficient binding for relatively a longer duration, only those peptides were chosen which were seen to bind constantly to the active site of the receptor protein over all the poses observed. Each peptide had different number of constituent amino acid residues; the peptides were classified based on the length into five groups. In each group the peptide length incremented upto four residues from the initial length form. Five peptides were selected for Molecular Dynamic simulation in Gromacs based on higher binding affinity. Post-dynamic analysis and the frame comparison inferred that neither the shorter nor the longer peptide but an intermediate length of 15 mer peptide bound well to the receptor. Residual substitution to the selected peptides was performed to enhance the targeted interaction. The new complexes considered were further analysed using the Elastic Network Model (ENM) for the functional site's intrinsic dynamic movement to estimate the new peptide's role. The study sheds light on prospects that besides the length of peptides, the combination of constituent residues equally plays a pivotal role in peptide-based inhibitor generation. The study envisages the challenges of fine-tuned peptide recovery and the scope of Machine Learning (ML) and Deep Learning (DL) algorithm development. As the study was primarily meant for generation of therapeutics for Tuberculosis (TB), the peptide proposed by this study demands meticulous invitro analysis prior to clinical applications.</p>","PeriodicalId":94249,"journal":{"name":"The protein journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11345320/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141629674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Conjugation with the Carrier Helped to Reveal acidification-Induced Structural Shift in the Peptide from Phospholipase Domain of Parvovirus B19. 与载体共轭有助于揭示 Parvovirus B19 磷脂酶结构域肽的酸化诱导结构转变。
The protein journal Pub Date : 2024-08-01 Epub Date: 2024-07-09 DOI: 10.1007/s10930-024-10209-w
Vladislav Victorovich Khrustalev, Olga Victorovna Khrustaleva, Aleksander Nicolaevich Stojarov, Anastasia Aleksandrovna Akunevich, Oleg Evgenyevich Baranov, Anna Vladimirovna Popinako, Elena Olegovna Samoilovich, Marina Anatolyevna Yermolovich, Galina Valeryevna Semeiko, Victoria Igorevna Cheprasova, Egor Gennadyevich Sapon, Nikolai Vladimirovich Shalygo, Victor Vitoldovich Poboinev, Tatyana Aleksandrovna Khrustaleva, Bahdan Vyacheslavovich Ranishenka, Ulyana Vitalyevna Kharytonova, Daniel Bush
{"title":"Conjugation with the Carrier Helped to Reveal acidification-Induced Structural Shift in the Peptide from Phospholipase Domain of Parvovirus B19.","authors":"Vladislav Victorovich Khrustalev, Olga Victorovna Khrustaleva, Aleksander Nicolaevich Stojarov, Anastasia Aleksandrovna Akunevich, Oleg Evgenyevich Baranov, Anna Vladimirovna Popinako, Elena Olegovna Samoilovich, Marina Anatolyevna Yermolovich, Galina Valeryevna Semeiko, Victoria Igorevna Cheprasova, Egor Gennadyevich Sapon, Nikolai Vladimirovich Shalygo, Victor Vitoldovich Poboinev, Tatyana Aleksandrovna Khrustaleva, Bahdan Vyacheslavovich Ranishenka, Ulyana Vitalyevna Kharytonova, Daniel Bush","doi":"10.1007/s10930-024-10209-w","DOIUrl":"10.1007/s10930-024-10209-w","url":null,"abstract":"<p><p>Spectroscopic studies on domains and peptides of large proteins are complicated because of the tendency of short peptides to form oligomers in aquatic buffers, but conjugation of a peptide with a carrier protein may be helpful. In this study we approved that a fragment of SK30 peptide from phospholipase A2 domain of VP1 Parvovirus B19 capsid protein (residues: 144-159; 164; 171-183; sequence: SAVDSAARIHDFRYSQLAKLGINPYTHWTVADEELLKNIK) turns from random coil to alpha helix in the acidic medium only in case if it had been conjugated with BSA (through additional N-terminal Cys residue, turning it into CSK31 peptide, and SMCC linker) according to CD-spectroscopy results. In contrast, unconjugated SK30 peptide does not undergo such shift because it forms stable oligomers connected by intermolecular antiparallel beta sheet, according to IR-spectroscopy, CD-spectroscopy, blue native gel electrophoresis and centrifugal ultrafiltration, as, probably, the whole isolated phospholipase domain of VP1 protein does. However, being a part of the long VP1 capsid protein, phospholipase domain may change its fold during the acidification of the medium in the endolysosome by the way of the formation of contacts between protonated His153 and Asp175, promoting the shift from random coil to alpha helix in its N-terminal part. This study opens up a perspective of vaccine development, since rabbit polyclonal antibodies against the conjugate of CSK31 peptide with BSA, in which the structure of the second alpha helix from the phospholipase A2 domain should be reproduced, can bind epitopes of the complete recombinant unique part of VP1 Parvovirus B19 capsid (residues: 1-227).</p>","PeriodicalId":94249,"journal":{"name":"The protein journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141560706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Recent Advancements in Biosensors for the Detection and Characterization of Amyloids: A Review. 用于检测和表征淀粉样蛋白的生物传感器的最新进展:综述。
The protein journal Pub Date : 2024-08-01 Epub Date: 2024-06-02 DOI: 10.1007/s10930-024-10205-0
Md Harun Rashid, Priyankar Sen
{"title":"Recent Advancements in Biosensors for the Detection and Characterization of Amyloids: A Review.","authors":"Md Harun Rashid, Priyankar Sen","doi":"10.1007/s10930-024-10205-0","DOIUrl":"10.1007/s10930-024-10205-0","url":null,"abstract":"<p><p>Modern medicine has increased the human lifespan. However, with an increase in average lifespan risk of amyloidosis increases. Amyloidosis is a condition characterized by protein misfolding and aggregation. Early detection of amyloidosis is crucial, yet conventional diagnostic methods are costly and lack precision, necessitating innovative tools. This review explores recent advancements in diverse amyloid detection methodologies, highlighting the need for interdisciplinary research to develop a miniaturized electrochemical biosensor leveraging nanotechnology. However, the diagnostics industry faces obstacles such as skilled labor shortages, standardized selection processes, and concurrent multi-analyte identification challenges. Research efforts are focused on integrating electrochemical techniques into clinical applications and diagnostics, with the successful transition of miniaturized technologies from development to testing posing a significant hurdle. Label-free transduction techniques like voltammetry and electrochemical impedance spectroscopy (EIS) have gained traction due to their rapid, cost-effective, and user-friendly nature.</p>","PeriodicalId":94249,"journal":{"name":"The protein journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141187230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structural, Biochemical Characterization and Molecular Mechanism of Cerastokunin: A New Kunitz-Type Peptide with Potential Inhibition of Thrombin, Factor Xa and Platelets. Cerastokunin 的结构、生化特征和分子机制:一种具有潜在凝血酶、Xa 因子和血小板抑制作用的新型 Kunitz 型多肽。
The protein journal Pub Date : 2024-08-01 Epub Date: 2024-08-02 DOI: 10.1007/s10930-024-10226-9
Noussaiba Saghour, Fatah Chérifi, Samah Saoud, Younes Zebbiche, Amel Meribai, Nadjia Bekkari, Taright-Mahi Samya, Fatima Laraba-Djebari
{"title":"Structural, Biochemical Characterization and Molecular Mechanism of Cerastokunin: A New Kunitz-Type Peptide with Potential Inhibition of Thrombin, Factor Xa and Platelets.","authors":"Noussaiba Saghour, Fatah Chérifi, Samah Saoud, Younes Zebbiche, Amel Meribai, Nadjia Bekkari, Taright-Mahi Samya, Fatima Laraba-Djebari","doi":"10.1007/s10930-024-10226-9","DOIUrl":"10.1007/s10930-024-10226-9","url":null,"abstract":"<p><p>The current investigation focused on separating Cerastes cerastes venom to produce the first Kunitz-type peptide. Based on its anti-trypsin effect, Cerastokunin, a 7.75 kDa peptide, was purified until homogenity by three steps of chromatography. Cerastokunin was found to include 67 amino acid residues that were obtained by de novo sequencing using LC-MALDI-MSMS. Upon alignment with Kunitz-type peptides, there was a high degree of similarity. Cerastokunin's 3D structure had 12% α-helices and 21% β-strands with pI 8.48. Cerastokunin showed a potent anticoagulant effect by inhibiting the protease activity of thrombin and trypsin as well as blocking the intrinsic and extrinsic coagulation pathways. In both PT and aPPT, Cerastokunin increased the blood clotting time in a dose-dependent way. Using Lys48 and Gln192 for direct binding, Cerastokunin inhibited thrombin, Factor Xa and trypsin as shown by molecular docking. Cerastokunin exhibited a dose-response blockade of PARs-dependent pathway platelet once stimulated by thrombin. An increased concentration of Cerastokunin resulted in a larger decrease of tail thrombus in the mice-carrageenan model in an in vivo investigation when compared to the effects of antithrombotic medications. At all Cerastokunin doses up to 6 mg/kg, no in vivo toxicity was seen in challenged mice over the trial's duration.</p>","PeriodicalId":94249,"journal":{"name":"The protein journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141879961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信