Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5138
Number of amino acids:285
Molecular Weight:32632.6 Da
Theoretical pI:9.15


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)175.96%
Cysteine CYS (C)134.56%
Glutamic Acid GLU (E)113.86%
Aspartic Acid ASP (D)165.61%
Glycine GLY (G)165.61%
Phynylalanine PHE (F)175.96%
Isoleucine ILE (I)144.91%
Histidine HIS (H)72.46%
Lysine LYS (K)217.37%
Methionine MET (M)62.11%
Leucine LEU (L)269.12%
Asparagine ASN (N)207.02%
Glutamine GLN (Q)93.16%
Proline PRO (P)103.51%
Serine SER (S)175.96%
Arginine ARG (R)196.67%
Threonine THR (T)134.56%
Tryptophan TRP (W)10.35%
Valine VAL (V)186.32%
Tyrosine TYR (Y)144.91%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1451
HydrogenH2269
NitrogenN407
OxygenO413
SulphurS19

FormulaC1451H2269N407O413S19
Total Number of Atoms:4559


Total number of positively charged residues (ARG + LYS):40
Total number of negatively charged residues (ASP + GLU):27
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    27110
Absorption 0.1% (=1 g/l)    0.831,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26360
Absorption 0.1% (=1 g/l)    0.808,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.54

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.58, 22.11, 21.05]

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:79.0176
Grand average of hydropathicity (GRAVY):-0.32