Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5762
Number of amino acids:118
Molecular Weight:11754.89 Da
Theoretical pI:9.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1815.25%
Cysteine CYS (C)108.47%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)10.85%
Glycine GLY (G)1311.02%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)97.63%
Histidine HIS (H)00%
Lysine LYS (K)65.08%
Methionine MET (M)32.54%
Leucine LEU (L)108.47%
Asparagine ASN (N)97.63%
Glutamine GLN (Q)43.39%
Proline PRO (P)65.08%
Serine SER (S)97.63%
Arginine ARG (R)43.39%
Threonine THR (T)65.08%
Tryptophan TRP (W)00%
Valine VAL (V)86.78%
Tyrosine TYR (Y)21.69%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC498
HydrogenH847
NitrogenN149
OxygenO151
SulphurS13

FormulaC498H847N149O151S13
Total Number of Atoms:1658


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):1
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    3605
Absorption 0.1% (=1 g/l)    0.307,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.254,   assuming all CYS residues are reduced
Aromaticity:0.017

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.19

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.58, 31.36, 26.27]

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:97.7118
Grand average of hydropathicity (GRAVY):0.47