Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4163
Number of amino acids:326
Molecular Weight:36197.68 Da
Theoretical pI:8.53


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)237.06%
Cysteine CYS (C)82.45%
Glutamic Acid GLU (E)164.91%
Aspartic Acid ASP (D)226.75%
Glycine GLY (G)226.75%
Phynylalanine PHE (F)267.98%
Isoleucine ILE (I)113.37%
Histidine HIS (H)61.84%
Lysine LYS (K)288.59%
Methionine MET (M)72.15%
Leucine LEU (L)319.51%
Asparagine ASN (N)195.83%
Glutamine GLN (Q)72.15%
Proline PRO (P)185.52%
Serine SER (S)175.21%
Arginine ARG (R)144.29%
Threonine THR (T)195.83%
Tryptophan TRP (W)00%
Valine VAL (V)267.98%
Tyrosine TYR (Y)61.84%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1626
HydrogenH2552
NitrogenN434
OxygenO471
SulphurS15

FormulaC1626H2552N434O471S15
Total Number of Atoms:5098


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):38
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    9440
Absorption 0.1% (=1 g/l)    0.261,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8940
Absorption 0.1% (=1 g/l)    0.247,   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 : 32.68

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.67, 23.31, 23.62]

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:80.4294
Grand average of hydropathicity (GRAVY):-0.20