Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5765
Number of amino acids:118
Molecular Weight:11570.28 Da
Theoretical pI:9.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2521.19%
Cysteine CYS (C)86.78%
Glutamic Acid GLU (E)10.85%
Aspartic Acid ASP (D)21.69%
Glycine GLY (G)97.63%
Phynylalanine PHE (F)10.85%
Isoleucine ILE (I)65.08%
Histidine HIS (H)00%
Lysine LYS (K)21.69%
Methionine MET (M)10.85%
Leucine LEU (L)75.93%
Asparagine ASN (N)54.24%
Glutamine GLN (Q)21.69%
Proline PRO (P)32.54%
Serine SER (S)1714.41%
Arginine ARG (R)86.78%
Threonine THR (T)75.93%
Tryptophan TRP (W)00%
Valine VAL (V)1210.17%
Tyrosine TYR (Y)21.69%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC484
HydrogenH819
NitrogenN151
OxygenO158
SulphurS9

FormulaC484H819N151O158S9
Total Number of Atoms:1621


Total number of positively charged residues (ARG + LYS):10
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    3480
Absorption 0.1% (=1 g/l)    0.301,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.258,   assuming all CYS residues are reduced
Aromaticity:0.025

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.92

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.73, 28.81, 28.81]

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:93.6441
Grand average of hydropathicity (GRAVY):0.55