Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4636
Number of amino acids:397
Molecular Weight:44351.62 Da
Theoretical pI:8.1


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)246.05%
Cysteine CYS (C)82.02%
Glutamic Acid GLU (E)164.03%
Aspartic Acid ASP (D)307.56%
Glycine GLY (G)338.31%
Phynylalanine PHE (F)164.03%
Isoleucine ILE (I)379.32%
Histidine HIS (H)123.02%
Lysine LYS (K)256.3%
Methionine MET (M)92.27%
Leucine LEU (L)317.81%
Asparagine ASN (N)246.05%
Glutamine GLN (Q)82.02%
Proline PRO (P)133.27%
Serine SER (S)287.05%
Arginine ARG (R)235.79%
Threonine THR (T)225.54%
Tryptophan TRP (W)82.02%
Valine VAL (V)215.29%
Tyrosine TYR (Y)92.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1966
HydrogenH3099
NitrogenN555
OxygenO581
SulphurS17

FormulaC1966H3099N555O581S17
Total Number of Atoms:6218


Total number of positively charged residues (ARG + LYS):48
Total number of negatively charged residues (ASP + GLU):46
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    57910
Absorption 0.1% (=1 g/l)    1.306,   assuming all pairs of CYS residues form cystines

Ext. coefficient    57410
Absorption 0.1% (=1 g/l)    1.294,   assuming all CYS residues are reduced
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.95

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.73, 24.69, 20.15]

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:88.1864
Grand average of hydropathicity (GRAVY):-0.27