Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2604
Number of amino acids:49
Molecular Weight:5608.48 Da
Theoretical pI:6.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)12.04%
Cysteine CYS (C)1020.41%
Glutamic Acid GLU (E)714.29%
Aspartic Acid ASP (D)24.08%
Glycine GLY (G)36.12%
Phynylalanine PHE (F)24.08%
Isoleucine ILE (I)12.04%
Histidine HIS (H)24.08%
Lysine LYS (K)612.24%
Methionine MET (M)00%
Leucine LEU (L)24.08%
Asparagine ASN (N)00%
Glutamine GLN (Q)24.08%
Proline PRO (P)36.12%
Serine SER (S)12.04%
Arginine ARG (R)36.12%
Threonine THR (T)36.12%
Tryptophan TRP (W)00%
Valine VAL (V)12.04%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC229
HydrogenH370
NitrogenN70
OxygenO74
SulphurS10

FormulaC229H370N70O74S10
Total Number of Atoms:753


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):9
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    625
Absorption 0.1% (=1 g/l)    0.111,   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:0.041

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 75.33

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[12.24, 14.29, 20.41]

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:31.8368
Grand average of hydropathicity (GRAVY):-0.86