Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6168
Number of amino acids:89
Molecular Weight:9811.87 Da
Theoretical pI:6.39


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)44.49%
Cysteine CYS (C)22.25%
Glutamic Acid GLU (E)55.62%
Aspartic Acid ASP (D)44.49%
Glycine GLY (G)910.11%
Phynylalanine PHE (F)22.25%
Isoleucine ILE (I)11.12%
Histidine HIS (H)44.49%
Lysine LYS (K)44.49%
Methionine MET (M)11.12%
Leucine LEU (L)1213.48%
Asparagine ASN (N)77.87%
Glutamine GLN (Q)66.74%
Proline PRO (P)33.37%
Serine SER (S)66.74%
Arginine ARG (R)44.49%
Threonine THR (T)910.11%
Tryptophan TRP (W)11.12%
Valine VAL (V)33.37%
Tyrosine TYR (Y)22.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC421
HydrogenH667
NitrogenN127
OxygenO138
SulphurS3

FormulaC421H667N127O138S3
Total Number of Atoms:1356


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8605
Absorption 0.1% (=1 g/l)    0.877,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.864,   assuming all CYS residues are reduced
Aromaticity:0.056

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.45

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.60, 28.09, 24.72]

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:71.2358
Grand average of hydropathicity (GRAVY):-0.72