Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4202
Number of amino acids:213
Molecular Weight:21356.09 Da
Theoretical pI:7.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2310.8%
Cysteine CYS (C)3215.02%
Glutamic Acid GLU (E)52.35%
Aspartic Acid ASP (D)52.35%
Glycine GLY (G)4219.72%
Phynylalanine PHE (F)62.82%
Isoleucine ILE (I)31.41%
Histidine HIS (H)20.94%
Lysine LYS (K)83.76%
Methionine MET (M)62.82%
Leucine LEU (L)94.23%
Asparagine ASN (N)115.16%
Glutamine GLN (Q)125.63%
Proline PRO (P)62.82%
Serine SER (S)167.51%
Arginine ARG (R)52.35%
Threonine THR (T)94.23%
Tryptophan TRP (W)31.41%
Valine VAL (V)31.41%
Tyrosine TYR (Y)73.29%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC869
HydrogenH1340
NitrogenN266
OxygenO289
SulphurS38

FormulaC869H1340N266O289S38
Total Number of Atoms:2802


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    28930
Absorption 0.1% (=1 g/l)    1.355,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26930
Absorption 0.1% (=1 g/l)    1.261,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.49

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.55, 35.21, 20.19]

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:36.8544
Grand average of hydropathicity (GRAVY):-0.11