Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4826
Number of amino acids:74
Molecular Weight:8248.72 Da
Theoretical pI:9.33


Amino Acid Composition:


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


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC352
HydrogenH553
NitrogenN109
OxygenO95
SulphurS13

FormulaC352H553N109O95S13
Total Number of Atoms:1122


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):3
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)    0.061,   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:0.108

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.41

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.97, 21.62, 21.62]

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:48.7838
Grand average of hydropathicity (GRAVY):0.13