Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4179
Number of amino acids:458
Molecular Weight:51106.88 Da
Theoretical pI:9.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)316.77%
Cysteine CYS (C)204.37%
Glutamic Acid GLU (E)91.97%
Aspartic Acid ASP (D)173.71%
Glycine GLY (G)337.21%
Phynylalanine PHE (F)224.8%
Isoleucine ILE (I)163.49%
Histidine HIS (H)102.18%
Lysine LYS (K)245.24%
Methionine MET (M)112.4%
Leucine LEU (L)357.64%
Asparagine ASN (N)306.55%
Glutamine GLN (Q)173.71%
Proline PRO (P)337.21%
Serine SER (S)306.55%
Arginine ARG (R)183.93%
Threonine THR (T)296.33%
Tryptophan TRP (W)153.28%
Valine VAL (V)398.52%
Tyrosine TYR (Y)194.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2310
HydrogenH3508
NitrogenN618
OxygenO636
SulphurS31

FormulaC2310H3508N618O636S31
Total Number of Atoms:7103


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):26
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    112060
Absorption 0.1% (=1 g/l)    2.193,   assuming all pairs of CYS residues form cystines

Ext. coefficient    110810
Absorption 0.1% (=1 g/l)    2.168,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.35

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.88, 27.51, 18.78]

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:74.8908
Grand average of hydropathicity (GRAVY):-0.12