Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1031
Number of amino acids:242
Molecular Weight:24664.59 Da
Theoretical pI:4.43


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3313.64%
Cysteine CYS (C)166.61%
Glutamic Acid GLU (E)114.55%
Aspartic Acid ASP (D)114.55%
Glycine GLY (G)3213.22%
Phynylalanine PHE (F)104.13%
Isoleucine ILE (I)83.31%
Histidine HIS (H)00%
Lysine LYS (K)41.65%
Methionine MET (M)52.07%
Leucine LEU (L)135.37%
Asparagine ASN (N)41.65%
Glutamine GLN (Q)41.65%
Proline PRO (P)145.79%
Serine SER (S)2610.74%
Arginine ARG (R)93.72%
Threonine THR (T)187.44%
Tryptophan TRP (W)41.65%
Valine VAL (V)114.55%
Tyrosine TYR (Y)93.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1065
HydrogenH1627
NitrogenN285
OxygenO348
SulphurS21

FormulaC1065H1627N285O348S21
Total Number of Atoms:3346


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    36410
Absorption 0.1% (=1 g/l)    1.476,   assuming all pairs of CYS residues form cystines

Ext. coefficient    35410
Absorption 0.1% (=1 g/l)    1.436,   assuming all CYS residues are reduced
Aromaticity:0.095

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 49.59

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.73, 31.41, 25.62]

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:60.6612
Grand average of hydropathicity (GRAVY):0.10