Physicochemical Properties of Peptide



PPepDB ID:PPepDB_812
Number of amino acids:236
Molecular Weight:24917.19 Da
Theoretical pI:6.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2711.44%
Cysteine CYS (C)166.78%
Glutamic Acid GLU (E)52.12%
Aspartic Acid ASP (D)145.93%
Glycine GLY (G)2811.86%
Phynylalanine PHE (F)114.66%
Isoleucine ILE (I)83.39%
Histidine HIS (H)41.69%
Lysine LYS (K)41.69%
Methionine MET (M)41.69%
Leucine LEU (L)135.51%
Asparagine ASN (N)72.97%
Glutamine GLN (Q)104.24%
Proline PRO (P)166.78%
Serine SER (S)114.66%
Arginine ARG (R)135.51%
Threonine THR (T)198.05%
Tryptophan TRP (W)31.27%
Valine VAL (V)156.36%
Tyrosine TYR (Y)83.39%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1084
HydrogenH1663
NitrogenN307
OxygenO330
SulphurS20

FormulaC1084H1663N307O330S20
Total Number of Atoms:3404


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):19
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)    1.181,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.141,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.05

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.58, 26.27, 20.76]

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:64.5763
Grand average of hydropathicity (GRAVY):-0.04