Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2265
Number of amino acids:49
Molecular Weight:5221.05 Da
Theoretical pI:10.14


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)714.29%
Cysteine CYS (C)48.16%
Glutamic Acid GLU (E)12.04%
Aspartic Acid ASP (D)00%
Glycine GLY (G)612.24%
Phynylalanine PHE (F)12.04%
Isoleucine ILE (I)36.12%
Histidine HIS (H)12.04%
Lysine LYS (K)816.33%
Methionine MET (M)00%
Leucine LEU (L)12.04%
Asparagine ASN (N)816.33%
Glutamine GLN (Q)12.04%
Proline PRO (P)00%
Serine SER (S)12.04%
Arginine ARG (R)36.12%
Threonine THR (T)12.04%
Tryptophan TRP (W)00%
Valine VAL (V)24.08%
Tyrosine TYR (Y)12.04%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC218
HydrogenH369
NitrogenN77
OxygenO64
SulphurS4

FormulaC218H369N77O64S4
Total Number of Atoms:732


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):1
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    1740
Absorption 0.1% (=1 g/l)    0.333,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.285,   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 : 21.69

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[16.33, 30.61, 18.37]

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:57.9592
Grand average of hydropathicity (GRAVY):-0.76