Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4076
Number of amino acids:116
Molecular Weight:11551.49 Da
Theoretical pI:8.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1613.79%
Cysteine CYS (C)108.62%
Glutamic Acid GLU (E)10.86%
Aspartic Acid ASP (D)21.72%
Glycine GLY (G)119.48%
Phynylalanine PHE (F)10.86%
Isoleucine ILE (I)43.45%
Histidine HIS (H)00%
Lysine LYS (K)86.9%
Methionine MET (M)54.31%
Leucine LEU (L)65.17%
Asparagine ASN (N)43.45%
Glutamine GLN (Q)32.59%
Proline PRO (P)86.9%
Serine SER (S)1613.79%
Arginine ARG (R)10.86%
Threonine THR (T)65.17%
Tryptophan TRP (W)00%
Valine VAL (V)108.62%
Tyrosine TYR (Y)43.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC490
HydrogenH806
NitrogenN134
OxygenO156
SulphurS15

FormulaC490H806N134O156S15
Total Number of Atoms:1601


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):3
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    6585
Absorption 0.1% (=1 g/l)    0.570,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.516,   assuming all CYS residues are reduced
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.43

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.55, 33.62, 24.14]

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:72.4138
Grand average of hydropathicity (GRAVY):0.33