Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4846
Number of amino acids:223
Molecular Weight:23650.37 Da
Theoretical pI:8.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2310.31%
Cysteine CYS (C)20.9%
Glutamic Acid GLU (E)41.79%
Aspartic Acid ASP (D)94.04%
Glycine GLY (G)146.28%
Phynylalanine PHE (F)167.17%
Isoleucine ILE (I)114.93%
Histidine HIS (H)31.35%
Lysine LYS (K)104.48%
Methionine MET (M)31.35%
Leucine LEU (L)2611.66%
Asparagine ASN (N)188.07%
Glutamine GLN (Q)94.04%
Proline PRO (P)156.73%
Serine SER (S)156.73%
Arginine ARG (R)52.24%
Threonine THR (T)167.17%
Tryptophan TRP (W)00%
Valine VAL (V)2310.31%
Tyrosine TYR (Y)10.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1073
HydrogenH1709
NitrogenN281
OxygenO309
SulphurS5

FormulaC1073H1709N281O309S5
Total Number of Atoms:3377


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):13
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    1615
Absorption 0.1% (=1 g/l)    0.068,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.063,   assuming all CYS residues are reduced
Aromaticity:0.076

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.86

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.53, 27.80, 25.11]

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:104.933
Grand average of hydropathicity (GRAVY):0.34