Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6153
Number of amino acids:74
Molecular Weight:8369.89 Da
Theoretical pI:8.47


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)22.7%
Cysteine CYS (C)810.81%
Glutamic Acid GLU (E)11.35%
Aspartic Acid ASP (D)34.05%
Glycine GLY (G)56.76%
Phynylalanine PHE (F)45.41%
Isoleucine ILE (I)56.76%
Histidine HIS (H)22.7%
Lysine LYS (K)56.76%
Methionine MET (M)34.05%
Leucine LEU (L)810.81%
Asparagine ASN (N)56.76%
Glutamine GLN (Q)68.11%
Proline PRO (P)00%
Serine SER (S)22.7%
Arginine ARG (R)22.7%
Threonine THR (T)79.46%
Tryptophan TRP (W)00%
Valine VAL (V)45.41%
Tyrosine TYR (Y)22.7%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC362
HydrogenH584
NitrogenN100
OxygenO105
SulphurS11

FormulaC362H584N100O105S11
Total Number of Atoms:1162


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):4
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    3480
Absorption 0.1% (=1 g/l)    0.416,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.356,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.73

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.08, 16.22, 18.92]

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:86.8919
Grand average of hydropathicity (GRAVY):0.16