Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3440
Number of amino acids:26
Molecular Weight:2876.4 Da
Theoretical pI:8.43


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)13.85%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)27.69%
Glycine GLY (G)00%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)13.85%
Histidine HIS (H)00%
Lysine LYS (K)311.54%
Methionine MET (M)13.85%
Leucine LEU (L)519.23%
Asparagine ASN (N)13.85%
Glutamine GLN (Q)13.85%
Proline PRO (P)27.69%
Serine SER (S)311.54%
Arginine ARG (R)00%
Threonine THR (T)311.54%
Tryptophan TRP (W)00%
Valine VAL (V)27.69%
Tyrosine TYR (Y)13.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC129
HydrogenH219
NitrogenN31
OxygenO40
SulphurS1

FormulaC129H219N31O40S1
Total Number of Atoms:420


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):2
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)    0.518
Aromaticity:0.038

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.51

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.62, 23.08, 26.92]

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:116.154
Grand average of hydropathicity (GRAVY):0.04