Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4884
Number of amino acids:119
Molecular Weight:13160.31 Da
Theoretical pI:5.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)65.04%
Cysteine CYS (C)32.52%
Glutamic Acid GLU (E)86.72%
Aspartic Acid ASP (D)54.2%
Glycine GLY (G)54.2%
Phynylalanine PHE (F)65.04%
Isoleucine ILE (I)65.04%
Histidine HIS (H)10.84%
Lysine LYS (K)86.72%
Methionine MET (M)21.68%
Leucine LEU (L)1613.45%
Asparagine ASN (N)75.88%
Glutamine GLN (Q)75.88%
Proline PRO (P)54.2%
Serine SER (S)97.56%
Arginine ARG (R)32.52%
Threonine THR (T)75.88%
Tryptophan TRP (W)10.84%
Valine VAL (V)1411.76%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC589
HydrogenH959
NitrogenN153
OxygenO176
SulphurS5

FormulaC589H959N153O176S5
Total Number of Atoms:1882


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5625
Absorption 0.1% (=1 g/l)    0.427,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    0.418,   assuming all CYS residues are reduced
Aromaticity:0.059

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.08

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.13, 21.85, 26.89]

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:111.261
Grand average of hydropathicity (GRAVY):0.17