Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4509
Number of amino acids:219
Molecular Weight:23441.17 Da
Theoretical pI:8.74


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)219.59%
Cysteine CYS (C)31.37%
Glutamic Acid GLU (E)115.02%
Aspartic Acid ASP (D)83.65%
Glycine GLY (G)156.85%
Phynylalanine PHE (F)125.48%
Isoleucine ILE (I)167.31%
Histidine HIS (H)41.83%
Lysine LYS (K)167.31%
Methionine MET (M)52.28%
Leucine LEU (L)198.68%
Asparagine ASN (N)115.02%
Glutamine GLN (Q)41.83%
Proline PRO (P)135.94%
Serine SER (S)177.76%
Arginine ARG (R)62.74%
Threonine THR (T)188.22%
Tryptophan TRP (W)00%
Valine VAL (V)177.76%
Tyrosine TYR (Y)31.37%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1052
HydrogenH1694
NitrogenN276
OxygenO311
SulphurS8

FormulaC1052H1694N276O311S8
Total Number of Atoms:3341


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):19
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    4595
Absorption 0.1% (=1 g/l)    0.196,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.191,   assuming all CYS residues are reduced
Aromaticity:0.068

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.94

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.59, 25.57, 25.57]

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:94.4292
Grand average of hydropathicity (GRAVY):0.12