Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5581
Number of amino acids:163
Molecular Weight:17658.03 Da
Theoretical pI:5.27


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)84.91%
Cysteine CYS (C)21.23%
Glutamic Acid GLU (E)137.98%
Aspartic Acid ASP (D)116.75%
Glycine GLY (G)2414.72%
Phynylalanine PHE (F)106.13%
Isoleucine ILE (I)95.52%
Histidine HIS (H)21.23%
Lysine LYS (K)169.82%
Methionine MET (M)21.23%
Leucine LEU (L)159.2%
Asparagine ASN (N)21.23%
Glutamine GLN (Q)63.68%
Proline PRO (P)74.29%
Serine SER (S)106.13%
Arginine ARG (R)42.45%
Threonine THR (T)84.91%
Tryptophan TRP (W)10.61%
Valine VAL (V)84.91%
Tyrosine TYR (Y)53.07%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC794
HydrogenH1238
NitrogenN204
OxygenO243
SulphurS4

FormulaC794H1238N204O243S4
Total Number of Atoms:2483


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13075
Absorption 0.1% (=1 g/l)    0.740,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.733,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.70

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.45, 26.38, 23.31]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:76.5644
Grand average of hydropathicity (GRAVY):-0.36