Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4160
Number of amino acids:353
Molecular Weight:38899.44 Da
Theoretical pI:6.21


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)154.25%
Cysteine CYS (C)51.42%
Glutamic Acid GLU (E)102.83%
Aspartic Acid ASP (D)185.1%
Glycine GLY (G)123.4%
Phynylalanine PHE (F)195.38%
Isoleucine ILE (I)267.37%
Histidine HIS (H)215.95%
Lysine LYS (K)102.83%
Methionine MET (M)82.27%
Leucine LEU (L)4211.9%
Asparagine ASN (N)195.38%
Glutamine GLN (Q)102.83%
Proline PRO (P)236.52%
Serine SER (S)4713.31%
Arginine ARG (R)102.83%
Threonine THR (T)287.93%
Tryptophan TRP (W)10.28%
Valine VAL (V)246.8%
Tyrosine TYR (Y)51.42%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1741
HydrogenH2733
NitrogenN465
OxygenO519
SulphurS13

FormulaC1741H2733N465O519S13
Total Number of Atoms:5471


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):28
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13200
Absorption 0.1% (=1 g/l)    0.339,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.333,   assuming all CYS residues are reduced
Aromaticity:0.071

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.79

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.14, 28.61, 21.25]

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:99.0934
Grand average of hydropathicity (GRAVY):0.08