Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6034
Number of amino acids:139
Molecular Weight:13620.83 Da
Theoretical pI:4.94


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2618.71%
Cysteine CYS (C)10.72%
Glutamic Acid GLU (E)32.16%
Aspartic Acid ASP (D)21.44%
Glycine GLY (G)53.6%
Phynylalanine PHE (F)42.88%
Isoleucine ILE (I)42.88%
Histidine HIS (H)00%
Lysine LYS (K)32.16%
Methionine MET (M)10.72%
Leucine LEU (L)128.63%
Asparagine ASN (N)21.44%
Glutamine GLN (Q)21.44%
Proline PRO (P)3424.46%
Serine SER (S)117.91%
Arginine ARG (R)10.72%
Threonine THR (T)1510.79%
Tryptophan TRP (W)00%
Valine VAL (V)117.91%
Tyrosine TYR (Y)21.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC629
HydrogenH995
NitrogenN149
OxygenO182
SulphurS2

FormulaC629H995N149O182S2
Total Number of Atoms:1957


Total number of positively charged residues (ARG + LYS):4
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    2980
Absorption 0.1% (=1 g/l)    0.219,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.219,   assuming all CYS residues are reduced
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 88.09

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.74, 37.41, 30.22]

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:86.5467
Grand average of hydropathicity (GRAVY):0.33