Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6172
Number of amino acids:76
Molecular Weight:8289.68 Da
Theoretical pI:8.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)45.26%
Cysteine CYS (C)810.53%
Glutamic Acid GLU (E)33.95%
Aspartic Acid ASP (D)22.63%
Glycine GLY (G)56.58%
Phynylalanine PHE (F)45.26%
Isoleucine ILE (I)11.32%
Histidine HIS (H)11.32%
Lysine LYS (K)11.32%
Methionine MET (M)33.95%
Leucine LEU (L)1013.16%
Asparagine ASN (N)67.89%
Glutamine GLN (Q)00%
Proline PRO (P)33.95%
Serine SER (S)810.53%
Arginine ARG (R)79.21%
Threonine THR (T)56.58%
Tryptophan TRP (W)00%
Valine VAL (V)56.58%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC348
HydrogenH572
NitrogenN106
OxygenO106
SulphurS11

FormulaC348H572N106O106S11
Total Number of Atoms:1143


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    500
Absorption 0.1% (=1 g/l)    0.060,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.053

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.47

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.32, 28.95, 26.32]

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:80.7895
Grand average of hydropathicity (GRAVY):0.18