Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1118
Number of amino acids:72
Molecular Weight:8148.48 Da
Theoretical pI:8.1


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)56.94%
Cysteine CYS (C)912.5%
Glutamic Acid GLU (E)56.94%
Aspartic Acid ASP (D)45.56%
Glycine GLY (G)45.56%
Phynylalanine PHE (F)56.94%
Isoleucine ILE (I)11.39%
Histidine HIS (H)11.39%
Lysine LYS (K)68.33%
Methionine MET (M)11.39%
Leucine LEU (L)68.33%
Asparagine ASN (N)22.78%
Glutamine GLN (Q)11.39%
Proline PRO (P)11.39%
Serine SER (S)34.17%
Arginine ARG (R)56.94%
Threonine THR (T)68.33%
Tryptophan TRP (W)11.39%
Valine VAL (V)56.94%
Tyrosine TYR (Y)11.39%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC351
HydrogenH557
NitrogenN99
OxygenO104
SulphurS10

FormulaC351H557N99O104S10
Total Number of Atoms:1121


Total number of positively charged residues (ARG + LYS):11
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    7490
Absorption 0.1% (=1 g/l)    0.919,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.858,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.39, 13.89, 23.61]

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:65
Grand average of hydropathicity (GRAVY):-0.10