Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5855
Number of amino acids:240
Molecular Weight:26596.54 Da
Theoretical pI:5.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)145.83%
Cysteine CYS (C)10.42%
Glutamic Acid GLU (E)104.17%
Aspartic Acid ASP (D)156.25%
Glycine GLY (G)93.75%
Phynylalanine PHE (F)145.83%
Isoleucine ILE (I)125%
Histidine HIS (H)52.08%
Lysine LYS (K)93.75%
Methionine MET (M)41.67%
Leucine LEU (L)208.33%
Asparagine ASN (N)197.92%
Glutamine GLN (Q)93.75%
Proline PRO (P)52.08%
Serine SER (S)3514.58%
Arginine ARG (R)93.75%
Threonine THR (T)218.75%
Tryptophan TRP (W)31.25%
Valine VAL (V)208.33%
Tyrosine TYR (Y)62.5%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1171
HydrogenH1821
NitrogenN317
OxygenO381
SulphurS5

FormulaC1171H1821N317O381S5
Total Number of Atoms:3695


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    25440
Absorption 0.1% (=1 g/l)    0.957,   assuming all pairs of CYS residues form cystines

Ext. coefficient    25440
Absorption 0.1% (=1 g/l)    0.957,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.91

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.25, 28.33, 20.00]

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:82
Grand average of hydropathicity (GRAVY):-0.22