Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1504
Number of amino acids:177
Molecular Weight:19052.41 Da
Theoretical pI:7.36


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)105.65%
Cysteine CYS (C)137.34%
Glutamic Acid GLU (E)52.82%
Aspartic Acid ASP (D)73.95%
Glycine GLY (G)2715.25%
Phynylalanine PHE (F)105.65%
Isoleucine ILE (I)73.95%
Histidine HIS (H)21.13%
Lysine LYS (K)52.82%
Methionine MET (M)21.13%
Leucine LEU (L)73.95%
Asparagine ASN (N)137.34%
Glutamine GLN (Q)73.95%
Proline PRO (P)169.04%
Serine SER (S)73.95%
Arginine ARG (R)84.52%
Threonine THR (T)137.34%
Tryptophan TRP (W)73.95%
Valine VAL (V)73.95%
Tyrosine TYR (Y)42.26%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC838
HydrogenH1241
NitrogenN237
OxygenO246
SulphurS15

FormulaC838H1241N237O246S15
Total Number of Atoms:2577


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    45210
Absorption 0.1% (=1 g/l)    2.373,   assuming all pairs of CYS residues form cystines

Ext. coefficient    44460
Absorption 0.1% (=1 g/l)    2.334,   assuming all CYS residues are reduced
Aromaticity:0.119

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.49

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.73, 35.59, 13.56]

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:47.9661
Grand average of hydropathicity (GRAVY):-0.38