Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5619
Number of amino acids:276
Molecular Weight:29726.06 Da
Theoretical pI:8.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2810.14%
Cysteine CYS (C)103.62%
Glutamic Acid GLU (E)93.26%
Aspartic Acid ASP (D)155.43%
Glycine GLY (G)3111.23%
Phynylalanine PHE (F)93.26%
Isoleucine ILE (I)72.54%
Histidine HIS (H)31.09%
Lysine LYS (K)113.99%
Methionine MET (M)72.54%
Leucine LEU (L)2810.14%
Asparagine ASN (N)103.62%
Glutamine GLN (Q)93.26%
Proline PRO (P)155.43%
Serine SER (S)227.97%
Arginine ARG (R)207.25%
Threonine THR (T)82.9%
Tryptophan TRP (W)62.17%
Valine VAL (V)207.25%
Tyrosine TYR (Y)82.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1307
HydrogenH2060
NitrogenN378
OxygenO382
SulphurS17

FormulaC1307H2060N378O382S17
Total Number of Atoms:4144


Total number of positively charged residues (ARG + LYS):31
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    45545
Absorption 0.1% (=1 g/l)    1.532,   assuming all pairs of CYS residues form cystines

Ext. coefficient    44920
Absorption 0.1% (=1 g/l)    1.511,   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 : 37.41

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.26, 28.26, 26.09]

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:80.6158
Grand average of hydropathicity (GRAVY):-0.12