Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6115
Number of amino acids:135
Molecular Weight:12802.69 Da
Theoretical pI:4.56


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3525.93%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)10.74%
Aspartic Acid ASP (D)21.48%
Glycine GLY (G)42.96%
Phynylalanine PHE (F)64.44%
Isoleucine ILE (I)21.48%
Histidine HIS (H)00%
Lysine LYS (K)21.48%
Methionine MET (M)32.22%
Leucine LEU (L)53.7%
Asparagine ASN (N)10.74%
Glutamine GLN (Q)21.48%
Proline PRO (P)3626.67%
Serine SER (S)128.89%
Arginine ARG (R)00%
Threonine THR (T)1511.11%
Tryptophan TRP (W)00%
Valine VAL (V)85.93%
Tyrosine TYR (Y)10.74%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC588
HydrogenH908
NitrogenN140
OxygenO173
SulphurS3

FormulaC588H908N140O173S3
Total Number of Atoms:1812


Total number of positively charged residues (ARG + LYS):2
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    1490
Absorption 0.1% (=1 g/l)    0.116
Aromaticity:0.052

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 83.49

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[16.30, 39.26, 32.59]

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:63.3333
Grand average of hydropathicity (GRAVY):0.28