Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1028
Number of amino acids:230
Molecular Weight:23877.6 Da
Theoretical pI:4.55


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2510.87%
Cysteine CYS (C)177.39%
Glutamic Acid GLU (E)31.3%
Aspartic Acid ASP (D)156.52%
Glycine GLY (G)2510.87%
Phynylalanine PHE (F)93.91%
Isoleucine ILE (I)52.17%
Histidine HIS (H)00%
Lysine LYS (K)83.48%
Methionine MET (M)20.87%
Leucine LEU (L)156.52%
Asparagine ASN (N)166.96%
Glutamine GLN (Q)114.78%
Proline PRO (P)104.35%
Serine SER (S)198.26%
Arginine ARG (R)52.17%
Threonine THR (T)198.26%
Tryptophan TRP (W)31.3%
Valine VAL (V)156.52%
Tyrosine TYR (Y)83.48%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1022
HydrogenH1577
NitrogenN283
OxygenO340
SulphurS19

FormulaC1022H1577N283O340S19
Total Number of Atoms:3241


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29420
Absorption 0.1% (=1 g/l)    1.232,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.190,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.48

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.91, 30.43, 19.57]

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:63.6957
Grand average of hydropathicity (GRAVY):-0.09