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 - DFBPDPIV0204(DPP IV-inhibitory peptide)

DFBP ID	DFBPDPIV0204
Peptide sequence	LPVPQ
Type	Native peptide
Peptide/Function name	DPP-IV inhibitory peptide, Anti-diabetic peptide

Function-activity relationship

Main bioactivity	DPP-IV inhibitory activity
Otheir bioactivity	N.D

Calculated physicochemical properties

Three-letter amino acid

Leu-Pro-Val-Pro-Gln

Single-letter amino acid

LPVPQ

Peptide length

Peptide mass

Experimental mass	Theoretical mass
N.D	552.67 Da ^c

Net charge

0.00 ^c

Isoelectric point (pI)

5.97 ^c

IC₅₀

N.D

pIC₅₀

N.D

GRAVY

0.2600^c

Hydrophilic residue ratio

80%^c

Peptide calculator

Peptide source & Food-borne protein(s) search

Classification	Animal
Organism/Source	Bovine milk protein
Precursor protein	β-Casein
Residue position	f(171-175)
Precursor protein(s) search	Source.1: DFBPPR7605 ---- Milk proteins ---- Beta-casein Source.2: DFBPPR7665 ---- Milk proteins ---- Beta-casein Source.3: DFBPPR7692 ---- Milk proteins ---- Beta-casein Source.4: DFBPPR7700 ---- Milk proteins ---- Beta-casein Source.5: DFBPPR7718 ---- Milk proteins ---- Beta-casein Source.6: DFBPPR8489 ---- Milk proteins ---- Beta-casein Source.7: DFBPPR21666 ---- Animal proteins ---- Importin-13 Source.8: DFBPPR12379 ---- Animal proteins ---- Potassium voltage-gated channel subfamily KQT member 1
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

DPP IV-inhibitory activity	The peptide showed potent activity against Dipeptidyl-peptidase IV (EC 3.4.14.5) with the IC₅₀ value of 43.8 ± 8.8 μM (p < 0.05), and its DPP-IV inhibitory pattern was shown by Lineweaver–Burk plots to be a competitive inhibition pattern.
Specific target protein(s)	Specific Target Protein(s): Dipeptidyl peptidase 4

Taste properties & Structure

Bitterness

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

SMILES

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

Preparation method

Mode of preparation	Synthesis
Enzyme(s)/starter culture	The peptides were from Genscript (Piscataway, NJ, USA).

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

Peptides present within the gastrointestinal tract of human may have promise for the development of natural DPP-IV inhibitors for the management of serum glucose.

Database cross-references

[D1]

[D2]

[D3]

[D4]

Reference(s)

Primary literature	Nongonierma AB, FitzGerald RJ. Structure activity relationship modelling of milk protein-derived peptides with dipeptidyl peptidase IV (DPP-IV) inhibitory activity. Peptides. 2016 May;79:1-7. PMID: 26988873 DOI: 10.1016/j.peptides.2016.03.005
Other literature(s)	N.D
PubDate	2016