Peptide properties

1Top 2Function-activity relationship 3Calculated physicochemical properties 4Peptide source & Food-borne protein(s) search 5Biological/Functional activity & target protein 6Taste properties & Structure 7Preparation method 8Stability & Cytotoxicity 9Additional information 10Database cross-references 11Reference(s)

List of peptide properties

DFBP ID - DFBPANOX0716(Antioxidative peptide)

DFBP ID	DFBPANOX0716
Peptide sequence	LKKISQ
Type	Native peptide
Peptide/Function name	Antioxidative peptide

Function-activity relationship

Main bioactivity	Antioxidative activity
Otheir bioactivity	ACE-inhibitory activity ^[D1], Antimicrobial activity ^[D2], Multifunctional activity ^[D3]

Calculated physicochemical properties

Three-letter amino acid

Leu-Lys-Lys-Ile-Ser-Gln

Single-letter amino acid

LKKISQ

Peptide length

Peptide mass

Experimental mass	Theoretical mass
N.D	715.88 Da ^c

Net charge

0.00 ^c

Isoelectric point (pI)

10.59 ^c

IC₅₀

N.D

pIC₅₀

N.D

GRAVY

-0.6333^c

Hydrophilic residue ratio

33.33%^c

Peptide calculator

Peptide source & Food-borne protein(s) search

Classification	Animal
Organism/Source	Ovine milk protein
Precursor protein	α_s2-Casein
Residue position	f(165-170)
Precursor protein(s) search	Source.1: DFBPPR7689 ---- Milk proteins ---- Alpha-S2-casein Source.2: DFBPPR7701 ---- Milk proteins ---- Alpha-S2-casein Source.3: DFBPPR8494 ---- Milk proteins ---- Alpha-S2-casein
Link-research Inductive analysis	There are no literature reports on the discovery of this sequence in other food-source proteins.

Biological/Functional activity & target protein

Antioxidative activity	The peptide with the sequence LKKISQ didn't showed oxygen radical-scavenging activity (ORAC-FL value of 0 μmol Trolox* equivalents per μmol of peptide). *Trolox - 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid, a water-soluble derivative of vitamin E.
Specific target protein(s)	N.D

Taste properties & Structure

Bitterness

Literature report	N.D
Bitter prediction tools	No prediction can be made about the peptide bitterness. ^prediction

SMILES

N[C@@]([H])(CC(C)C)C(=O)N[C@@]([H])(CCCCN)C(=O)N[C@@]([H])(CCCCN)C(=O)N[C@@]([H])([C@]([H])(CC)C)C(=O)N[C@@]([H])(CO)C(=O)N[C@@]([H])(CCC(=O)N)C(=O)O

Preparation method

Mode of preparation	Enzymatic hydrolysis
Enzyme(s)/starter culture	Peptide obtained by hydrolysis of ovine α_s2-casein by use of porcine pepsin A.

Stability & Cytotoxicity

Peptide stability

Literature report:	N.D
EHP-Tool:	Enzymatic Hydrolysis Prediction Tool (EHP-Tool)

Peptide cytotoxicity

Literature report:	N.D
Prediction:	ToxinPred

Additional information

N.D

Database cross-references

DFBP

[D1]	DFBPACEI1800
[D2]	DFBPAMIC0186
[D3]	DFBPMUFU0537

[D4]

[D5]

[D6]

[D7]

Reference(s)

Primary literature	López-Expósito, I., Quirós, A., Amigo, L., Recio, I. Casein hydrolysates as a source of antimicrobial, antioxidant and antihypertensive peptides. Le Lait. 2007, 87, 241-9. DOI: 10.1051/lait:2007019
Other literature(s)	N.D
PubDate	2007