Trypsin Hydrolysis of Lysine Ethyl Ester

1951 ◽  
Vol 73 (3) ◽  
pp. 1382-1382 ◽  
Author(s):  
Harold Werbin ◽  
Ann Palm
Keyword(s):  
Ethyl Ester ◽  
Trypsin Hydrolysis ◽  
Hydrolysis Of

Synthesis of Normuramic Acid Carba Analog and Its Glycopeptide Derivative Resistant to β-Elimination Splitting of the Side Chain

2000 ◽  
Vol 65 (11) ◽  
pp. 1726-1736 ◽  
Author(s):  
Miroslav Ledvina ◽  
Radka Pavelová ◽  
Anna Rohlenová ◽  
Jan Ježek ◽  
David Šaman
Keyword(s):  
Ethyl Ester ◽  
Alkaline Hydrolysis ◽  
Benzyl Ester ◽  
Side Chain ◽  
Propanoic Acid ◽  
Hydrolysis Of

Carba analogs of normuramic acid, i.e., 3-(benzyl 2-acetamido-2,3-dideoxy-4,6-O-isopropylidene-α-D-glucopyranosid-3-yl)propanoic acid derivatives (nitrile or esters) 3a-3c were prepared by addition of radicals generated from benzyl 2-acetamido-2-deoxy-4,6-O-isopropylidene-3-O-[(methylsulfanyl)thiocarbonyl]- (2a) or -3-O-(phenoxythiocarbonyl)-α-D-glucopyranoside (2b) with Bu3SnH to acrylonitrile or acryl esters. Alkaline hydrolysis of ethyl ester 3c afforded 3-(benzyl 2-acetamido-2,3-dideoxy-4,6-O-isopropylidene-α-D-glucopyranosid-3-yl)propanoic acid (5). Coupling of acid 5 with L-2-aminobutanoyl-D-isoglutamine benzyl ester trifluoroacetate and subsequent deprotection of the intermediate 6 furnished N-[3-(2-acetamido-2,3-dideoxy-α-D-glucopyranosid-3-yl)propanoyl]-L-2-aminobutanoyl-D-isoglutamine (7).

Effect of Trypsin on Antioxidant Activity and Gel-Rheology of Flaxseed Protein

2017 ◽  
Vol 13 (3) ◽  
Author(s):  
Yuan-yuan Chang ◽  
Chong-hao Bi ◽  
Li-jun Wang ◽  
Dong Li ◽  
Benu Adhikari ◽  
...  
Keyword(s):  
Gel Strength ◽  
Protein Hydrolysates ◽  
Hydrodynamic Diameter ◽  
Considerable Decrease ◽  
Antioxidative Properties ◽  
Trypsin Hydrolysis ◽  
Gelling Property ◽  
High Degree ◽  
Hydrolysis Of ◽  
Antioxidative Property

Abstract Enzymatic hydrolysis of flaxseed protein (FP) was carried out using trypsin in order to obtain flaxseed protein hydrolysates possessing better antioxidative property and modified rheological properties. The antioxidative properties of hydrolysates were much higher than the unhydrolyzed flaxseed protein. The hydrolysis also significantly reduced the hydrodynamic diameter of the magnitude of zeta potential of the dispersions. The gelling point of the hydrolysates occurred earlier than the unhydrolyzed sample while the duration of hydrolysis (30–120 min) did not affect gelling point of the hydrolysates. Considerable decrease in the gel strength and the frequency dependence of gel strength were observed in gels produced using hydrolyzed flaxseed protein. The above findings indicate that hydrolysates possessing high degree of antioxidative properties. The gels produces from these hydrolysates will have fast gelling property and will produce gels with reasonable strength. Thus, flaxseed protein hydrolysates obtained from trypsin hydrolysis can be used in applications that require proteins with higher antioxidative properties but softer texture.

Anterior midgut proteinase inhibitor from Glossina morsitans morsitans Westwood (Diptera: Glossinidae) and its effects upon tsetse digestive enzymes

1980 ◽  
Vol 58 (1) ◽  
pp. 79-87 ◽  
Author(s):  
Jon G. Houseman
Keyword(s):  
Proteinase Inhibitor ◽  
Periplaneta Americana ◽  
Specific Activity ◽  
Glossina Morsitans Morsitans ◽  
Tsetse Flies ◽  
Trypsin Activity ◽  
Glossina Morsitans ◽  
Trypsin Hydrolysis ◽  
Hydrolysis Of ◽  
Anterior Midgut

The anterior midgut of Glossina morsitans morsitans Westwood contains a proteinase inhibitor, molecular weight 5000 ± 2000daltons, stable to 1 M HCl, heat, and dialysis, but unstable to 1% trichloroacetic acid. Inhibitor activity is not associated with anticoagulant in the anterior midgut. The specific activity of the proteinase inhibitor is similar in mated and unmated females and greater than in male tsetse flies. Proteinase inhibitor inhibits proteinase VI and trypsin hydrolysis of N-benzoyl-L-arginine ethyl ester (BAEE) and benzoyl-DL-arginine-p-nitroanilide (BAPNA) but has no effect on proteinase VI hydrolysis of haemoglobin. Inhibition of trypsin hydrolysis of haemoglobin is noncompetitive. Proteinase inhibitor levels in the anterior midgut decreased immediately after feeding and then increased, reaching a maximum 60–100 h after ingestion of the bloodmeal. Postteneral flies contained higher levels of proteinase inhibitor than teneral individuals. Trypsin activity in gut homogenates of Phormia regina and Aedes aegypti was inhibited by the tsetse inhibitor. There was no detectable inhibition of bovine or Pterostichus adstrictus trypsin activity. Inhibition of Periplaneta americana trypsin occurred but was less than fly trypsin inhibition. The possible role of the inhibitor in terminating proteinase production is discussed.

Isolation and characterization of anti-inflammatory peptides derived from trypsin hydrolysis of microalgae protein (Synechococcus sp. VDW)

2019 ◽  
Vol 33 (4) ◽  
pp. 303-324 ◽  
Author(s):  
Rutairat Suttisuwan ◽  
Saranya Phunpruch ◽  
Tanatorn Saisavoey ◽  
Papassara Sangtanoo ◽  
Nuttha Thongchul ◽  
...  
Keyword(s):  
Isolation And Characterization ◽  
Trypsin Hydrolysis ◽  
Synechococcus Sp ◽  
Anti Inflammatory ◽  
Hydrolysis Of

Thermodynamics of the Hydrolysis of N-Acetyl-L-phenylalanine Ethyl Ester in Water and in Organic Solvents

1995 ◽  
Vol 99 (5) ◽  
pp. 1594-1601 ◽  
Author(s):  
Y. B. Tewari ◽  
M. M. Schantz ◽  
P. C. Pandey ◽  
M. V. Rekharsky ◽  
R. N. Goldberg
Keyword(s):  
Ethyl Ester ◽  
Organic Solvents ◽  
Hydrolysis Of

Enzyme-Mediated Self-Assembly of Highly Ordered Structures From Disordered Proteins

2008 ◽  
Author(s):  
Ahmad Athamneh ◽  
Justin Barone
Keyword(s):  
Self Assembly ◽  
Amyloid Fibrils ◽  
Prion Diseases ◽  
Wheat Gluten ◽  
Disordered Proteins ◽  
X Ray Diffraction ◽  
Ordered Structures ◽  
Wide Range ◽  
Trypsin Hydrolysis ◽  
Hydrolysis Of

Trypsin hydrolysis of wheat gluten produced glutamine-rich short peptides with a tendency to self-assemble into supermolecular structures extrinsic to native wheat gluten. Fourier transform infrared and X-ray diffraction data suggested that the new structures formed resembled that of cross-β amyloid fibrils found in some insect silk and implicated in prion diseases. The superstructures were about 10 μm in diameter with clear right-handed helical configuration and appeared to be bundles of smaller fibrils of about 63 nm in diameter. Results demonstrate the potential for utilizing cheap protein sources and natural mechanisms of protein self-assembly to design advanced nanomaterials that can provide a wide range of structural and chemical functionality.

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