Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5820
Number of amino acids:223
Molecular Weight:26075.35 Da
Theoretical pI:8.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)62.69%
Cysteine CYS (C)94.04%
Glutamic Acid GLU (E)94.04%
Aspartic Acid ASP (D)135.83%
Glycine GLY (G)114.93%
Phynylalanine PHE (F)177.62%
Isoleucine ILE (I)146.28%
Histidine HIS (H)73.14%
Lysine LYS (K)167.17%
Methionine MET (M)41.79%
Leucine LEU (L)2611.66%
Asparagine ASN (N)62.69%
Glutamine GLN (Q)135.83%
Proline PRO (P)167.17%
Serine SER (S)104.48%
Arginine ARG (R)114.93%
Threonine THR (T)156.73%
Tryptophan TRP (W)41.79%
Valine VAL (V)83.59%
Tyrosine TYR (Y)83.59%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1196
HydrogenH1831
NitrogenN309
OxygenO320
SulphurS13

FormulaC1196H1831N309O320S13
Total Number of Atoms:3669


Total number of positively charged residues (ARG + LYS):27
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34420
Absorption 0.1% (=1 g/l)    1.320,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33920
Absorption 0.1% (=1 g/l)    1.301,   assuming all CYS residues are reduced
Aromaticity:0.130

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.79

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.53, 19.28, 20.18]

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:83.0494
Grand average of hydropathicity (GRAVY):-0.25