Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4569
Number of amino acids:146
Molecular Weight:15634.56 Da
Theoretical pI:7.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2617.81%
Cysteine CYS (C)74.79%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)96.16%
Glycine GLY (G)128.22%
Phynylalanine PHE (F)32.05%
Isoleucine ILE (I)42.74%
Histidine HIS (H)32.05%
Lysine LYS (K)42.74%
Methionine MET (M)21.37%
Leucine LEU (L)96.16%
Asparagine ASN (N)85.48%
Glutamine GLN (Q)106.85%
Proline PRO (P)64.11%
Serine SER (S)53.42%
Arginine ARG (R)64.11%
Threonine THR (T)117.53%
Tryptophan TRP (W)53.42%
Valine VAL (V)96.16%
Tyrosine TYR (Y)74.79%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC686
HydrogenH1043
NitrogenN197
OxygenO206
SulphurS9

FormulaC686H1043N197O206S9
Total Number of Atoms:2141


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    38305
Absorption 0.1% (=1 g/l)    2.450,   assuming all pairs of CYS residues form cystines

Ext. coefficient    37930
Absorption 0.1% (=1 g/l)    2.426,   assuming all CYS residues are reduced
Aromaticity:0.103

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 14.17

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.34, 21.23, 25.34]

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:70.4109
Grand average of hydropathicity (GRAVY):-0.14