Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1082
Number of amino acids:114
Molecular Weight:12193.32 Da
Theoretical pI:5.27


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)87.02%
Cysteine CYS (C)65.26%
Glutamic Acid GLU (E)54.39%
Aspartic Acid ASP (D)65.26%
Glycine GLY (G)54.39%
Phynylalanine PHE (F)54.39%
Isoleucine ILE (I)108.77%
Histidine HIS (H)00%
Lysine LYS (K)87.02%
Methionine MET (M)32.63%
Leucine LEU (L)1311.4%
Asparagine ASN (N)76.14%
Glutamine GLN (Q)00%
Proline PRO (P)43.51%
Serine SER (S)1210.53%
Arginine ARG (R)21.75%
Threonine THR (T)97.89%
Tryptophan TRP (W)00%
Valine VAL (V)108.77%
Tyrosine TYR (Y)10.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC538
HydrogenH889
NitrogenN135
OxygenO166
SulphurS9

FormulaC538H889N135O166S9
Total Number of Atoms:1737


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):11
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    1865
Absorption 0.1% (=1 g/l)    0.153,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.122,   assuming all CYS residues are reduced
Aromaticity:0.053

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.11

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.21, 24.56, 25.44]

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:111.14
Grand average of hydropathicity (GRAVY):0.50