Physicochemical characteristics, ATR-FTIR molecular interactions and in vitro starch and protein digestion of thermally-treated whole pulse flours

2018 ◽  
Vol 105 ◽  
pp. 371-383 ◽  
Author(s):  
Carolina Estefanía Chávez-Murillo ◽  
Jorge Ivan Veyna-Torres ◽  
Luisa María Cavazos-Tamez ◽  
Julián de la Rosa-Millán ◽  
Sergio Othon Serna-Saldívar
Keyword(s):  
Molecular Interactions ◽  
Physicochemical Characteristics ◽  
Protein Digestion ◽  
Thermally Treated

scholarly journals Utilizing Hydrothermal Processing to Align Structure and In Vitro Digestion Kinetics between Three Different Pulse Types

Foods ◽  
2022 ◽  
Vol 11 (2) ◽  
pp. 206
Author(s):  
Katharina Pälchen ◽  
Ben Van den Wouwer ◽  
Dorine Duijsens ◽  
Marc E. Hendrickx ◽  
Ann Van Loey ◽  
...  
Keyword(s):  
In Vitro Digestion ◽  
Physicochemical Characteristics ◽  
Protein Digestion ◽  
Hydrothermal Processing ◽  
Extrinsic Factors ◽  
Food Ingredients ◽  
Structural Architecture ◽  
Digestion Kinetics ◽  
Cotyledon Cells

Processing results in the transformation of pulses’ structural architecture. Consequently, digestion is anticipated to emerge from the combined effect of intrinsic (matrix-dependent) and extrinsic (processed-induced) factors. In this work, we aimed to investigate the interrelated effect of intrinsic and extrinsic factors on pulses’ structural architecture and resulting digestive consequences. Three commercially relevant pulses (chickpea, pea, black bean) were selected based on reported differences in macronutrient and cell wall composition. Starch and protein digestion kinetics of hydrothermally processed whole pulses were assessed along with microstructural and physicochemical characteristics and compared to the digestion behavior of individual cotyledon cells isolated thereof. Despite different rates of hardness decay upon hydrothermal processing, the pulses reached similar residual hardness values (40 N). Aligning the pulses at the level of this macrostructural property translated into similar microstructural characteristics after mechanical disintegration (isolated cotyledon cells) with comparable yields of cotyledon cells for all pulses (41–62%). We observed that processing to equivalent microstructural properties resulted in similar starch and protein digestion kinetics, regardless of the pulse type and (prolonged) processing times. This demonstrated the capacity of (residual) hardness as a food structuring parameter in pulses. Furthermore, we illustrated that the digestive behavior of isolated cotyledon cells was representative of the digestion behavior of corresponding whole pulses, opening up perspectives for the incorporation of complete hydrothermally processed pulses as food ingredients.

scholarly journals Physicochemical Characteristics of Arginine Enriched NaF Varnish: An In Vitro Study

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2998
Author(s):  
Mohammed Nadeem Bijle ◽  
Manikandan Ekambaram ◽  
Edward Lo ◽  
Cynthia Yiu
Keyword(s):  
Molecular Dynamics ◽  
Physical Properties ◽  
Artificial Saliva ◽  
Chemical Properties ◽  
In Vitro Study ◽  
Physicochemical Characteristics ◽  
Vitro Study ◽  
Physical And Chemical ◽  
Stable Matrix

The in vitro study objectives were to investigate the effect of arginine (Arg) incorporation in a 5% sodium fluoride (NaF) varnish on its physical and chemical properties including F/Arg release. Six experimental formulations were prepared with L-arginine (L-Arg) and L-arginine monohydrochloride at 2%, 4%, and 8% w/v in a 5% NaF varnish, which served as a control. The varnishes were subjected to assessments for adhesion, viscosity, and NaF extraction. Molecular dynamics were simulated to identify post-dynamics total energy for NaF=Arg/Arg>NaF/Arg<NaF concentrations. The Arg/F varnish release profiles were determined in polyacrylic lactate buffer (pH-4.5; 7 days) and artificial saliva (pH-7; 1 h, 24 h, and 12 weeks). Incorporation of L-Arg in NaF varnish significantly influences physical properties ameliorating retention (p < 0.001). L-Arg in NaF varnish institutes the Arg-F complex. Molecular dynamics suggests that NaF>Arg concentration denotes the stabilized environment compared to NaF<Arg (p < 0.001). The 2% Arg-NaF exhibits periodic perennial Arg/F release and shows significantly higher integrated mean F release than NaF (p < 0.001). Incorporating 2% L-arginine in 5% NaF varnish improves its physical properties and renders a stable matrix with enduring higher F/Arg release than control.

RNAP subunits F/E (RPB4/7) are stably associated with archaeal RNA polymerase: using fluorescence anisotropy to monitor RNAP assembly in vitro

2009 ◽  
Vol 421 (3) ◽  
pp. 339-343 ◽  
Author(s):  
Dina Grohmann ◽  
Angela Hirtreiter ◽  
Finn Werner
Keyword(s):  
Rna Polymerase ◽  
Molecular Interactions ◽  
Fluorescence Anisotropy ◽  
Rna Polymerases ◽  
Dynamic Exchange ◽  
Transcription Cycle

Archaeal and eukaryotic RNAPs (DNA-dependent RNA polymerases) are complex multi-subunit enzymes. Two of the subunits, F and E, which together form the F/E complex, have been hypothesized to associate with RNAP in a reversible manner during the transcription cycle. We have characterized the molecular interactions between the F/E complex and the RNAP core. F/E binds to RNAP with submicromolar affinity and is not in a dynamic exchange with unbound F/E.

Effect of physical and physicochemical characteristics of chitosan on fat-binding capacities under in vitro gastrointestinal conditions

LWT ◽  
2016 ◽  
Vol 71 ◽  
pp. 25-32 ◽  
Author(s):  
Nootchanartch Panith ◽  
Jetsada Wichaphon ◽  
Sittiwat Lertsiri ◽  
Nuttawee Niamsiri
Keyword(s):  
Physicochemical Characteristics ◽  
Gastrointestinal Conditions

In silico screening of phytoconstituents with antiviral activities against SARS-COV-2 main protease, Nsp12 polymerase and Nsp13 helicase proteins

2021 ◽  
Vol 18 ◽  
Author(s):  
Jainey James ◽  
Divya Jyothi ◽  
Sneh Priya
Keyword(s):  
Antiviral Activity ◽  
Molecular Interactions ◽  
In Silico ◽  
Antiviral Treatment ◽  
In Vivo Studies ◽  
Main Protease ◽  
Hypothesis Model ◽  
Antiviral Activities ◽  
Pharmacophore Hypothesis

Aims: The present study aim was to analyse the molecular interactions of the phytoconstituents known for their antiviral activity with the SARS-CoV-2 nonstructural proteins such as main protease (6LU7), Nsp12 polymerase (6M71), and Nsp13 helicase (6JYT). The applied in silico methodologies was molecular docking and pharmacophore modeling using Schrodinger software. Methods: The phytoconstituents were taken from PubChem, and SARS-CoV-2 proteins were downloaded from the protein data bank. The molecular interactions, binding energy, ADMET properties and pharmacophoric features were analysed by glide XP, prime MM-GBSA, qikprop and phase application of Schrodinger respectively. The antiviral activity of the selected phytoconstituents was carried out by PASS predictor, online tools. Results: The docking score analysis showed that quercetin 3-rhamnoside (-8.77 kcal/mol) and quercetin 3-rhamnoside (-7.89 kcal/mol) as excellent products to bind with their respective targets such as 6LU7, 6M71 and 6JYT. The generated pharmacophore hypothesis model validated the docking results, confirming the hydrogen bonding interactions of the amino acids. The PASS online tool predicted constituent's antiviral potentials. Conclusion: The docked phytoconstituents showed excellent interactions with the SARS-CoV-2 proteins, and on the outset, quercetin 3-rhamnoside and quercetin 7-rhamnoside have well-interacted with all the three proteins, and these belong to the plant Houttuynia cordata. The pharmacophore hypothesis has revealed the characteristic features responsible for their interactions, and PASS prediction data has supported their antiviral activities. Thus, these natural compounds could be developed as lead molecules for antiviral treatment against SARS-CoV-2. Further in-vitro and in-vivo studies could be carried out to provide better drug therapy.

scholarly journals In vitro protein digestion kinetics of protein sources for pigs

animal ◽  
2019 ◽  
Vol 13 (6) ◽  
pp. 1154-1164 ◽  
Author(s):  
H. Chen ◽  
P.A. Wierenga ◽  
W.H. Hendriks ◽  
A.J.M. Jansman
Keyword(s):  
Protein Digestion ◽  
Protein Sources ◽  
Digestion Kinetics ◽  
Kinetics Of ◽  
Vitro Protein

Comparative efficiency of microbial enzyme preparations versus pancreatin for in vitro alimentary protein digestion

Amino Acids ◽  
2012 ◽  
Vol 44 (2) ◽  
pp. 563-572 ◽  
Author(s):  
Mireille Andriamihaja ◽  
Alain Guillot ◽  
Allan Svendsen ◽  
Joerg Hagedorn ◽  
Sahondra Rakotondratohanina ◽  
...  
Keyword(s):  
Protein Digestion ◽  
Enzyme Preparations ◽  
Comparative Efficiency ◽  
Microbial Enzyme

scholarly journals Identification and characterization of molecular interactions between mortalin/mtHsp70 and HSP60

2005 ◽  
Vol 391 (2) ◽  
pp. 185-190 ◽  
Author(s):  
Renu Wadhwa ◽  
Syuichi Takano ◽  
Kamaljit Kaur ◽  
Satoshi Aida ◽  
Tomoko Yaguchi ◽  
...  
Keyword(s):  
Heat Shock ◽  
Molecular Interactions ◽  
Heat Shock Protein 60 ◽  
Hsp60 Expression ◽  
Mitochondrial Hsp70 ◽  
Shock Proteins ◽  
First Time

Mortalin/mtHsp70 (mitochondrial Hsp70) and HSP60 (heat-shock protein 60) are heat-shock proteins that reside in multiple subcellular compartments, with mitochondria being the predominant one. In the present study, we demonstrate that the two proteins interact both in vivo and in vitro, and that the N-terminal region of mortalin is involved in these interactions. Suppression of HSP60 expression by shRNA (short hairpin RNA) plasmids caused the growth arrest of cancer cells similar to that obtained by suppression of mortalin expression by ribozymes. An overexpression of mortalin, but not of HSP60, extended the in vitro lifespan of normal fibroblasts (TIG-1). Taken together, this study for the first time delineates: (i) molecular interactions of HSP60 with mortalin; (ii) their co- and exclusive localizations in vivo; (iii) their involvement in tumorigenesis; and (iv) their functional distinction in pathways involved in senescence.

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