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 - DFBPOPIO0115(Opioid peptide)

DFBP ID	DFBPOPIO0115
Peptide sequence	YPFVEPI
Type	Native peptide
Peptide/Function name	Opioid peptide, β-Casomorphin-7

Function-activity relationship

Main bioactivity	Opioid activity
Otheir bioactivity	PEP-inhibitory activity ^[D1], Multifunctional activity ^[D2]

Calculated physicochemical properties

Three-letter amino acid

Tyr-Pro-Phe-Val-Glu-Pro-Ile

Single-letter amino acid

YPFVEPI

Peptide length

Peptide mass

Experimental mass	Theoretical mass
N.D	864.00 Da ^c

Net charge

0.00 ^c

Isoelectric point (pI)

3.34 ^c

IC₅₀

N.D

pIC₅₀

N.D

GRAVY

0.5000^c

Hydrophilic residue ratio

71.43%^c

Peptide calculator

Peptide source & Food-borne protein(s) search

Classification	Human
Organism/Source	Human milk protein
Precursor protein	β-Casein
Residue position	f(51-57)^[2]
Precursor protein(s) search	Source.1: DFBPPR7605 ---- Milk proteins ---- Beta-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

Opioid activity

Opioid activity	References
Opioid agonist	[1]

Specific target protein(s)

N.D

Taste properties & Structure

Bitterness

Literature report	N.D
Bitter prediction tools	Bitter taste ^prediction

SMILES

N[C@@]([H])(Cc1ccc(O)cc1)C(=O)N1[C@@]([H])(CCC1)C(=O)N[C@@]([H])(Cc1ccccc1)C(=O)N[C@@]([H])(C(C)C)C(=O)N[C@@]([H])(CCC(=O)O)C(=O)N1[C@@]([H])(CCC1)C(=O)N[C@@]([H])([C@]([H])(CC)C)C(=O)O

Preparation method

Mode of preparation	Synthesis
Enzyme(s)/starter culture	Synthesis peptide

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]	DFBPPEPI0062
[D2]	DFBPMUFU0763

[D3]

[D4]

[D5]

[D6]

Reference(s)

Primary literature	Lottspeich F, Henschen A, Brantl V, Teschemacher H. Novel opioid peptides derived from casein (beta-casomorphins). III. Synthetic peptides corresponding to components from bovine casein peptone. Hoppe Seylers Z Physiol Chem. 1980 Dec;361(12):1835-9. PMID: 7461609 DOI: 10.1515/bchm2.1980.361.2.1835
Other literature(s)	[1] Kostyra E, Sienkiewiczszłapka E, Jarmołowska B, et al. Opioid peptides derived from milk proteins.[J]. Polish Journal of Food & Nutrition Sciences, 2004. [2] Fiat A M, Jollès P. Caseins of various origins and biologically active casein peptides and oligosaccharides: Structural and physiological aspects[J]. Molecular & Cellular Biochemistry, 1989, 87(1):5-30.
PubDate	1980