Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1041
Number of amino acids:122
Molecular Weight:13354.54 Da
Theoretical pI:6.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1310.66%
Cysteine CYS (C)119.02%
Glutamic Acid GLU (E)54.1%
Aspartic Acid ASP (D)64.92%
Glycine GLY (G)75.74%
Phynylalanine PHE (F)97.38%
Isoleucine ILE (I)64.92%
Histidine HIS (H)54.1%
Lysine LYS (K)75.74%
Methionine MET (M)32.46%
Leucine LEU (L)97.38%
Asparagine ASN (N)54.1%
Glutamine GLN (Q)21.64%
Proline PRO (P)43.28%
Serine SER (S)97.38%
Arginine ARG (R)21.64%
Threonine THR (T)32.46%
Tryptophan TRP (W)10.82%
Valine VAL (V)119.02%
Tyrosine TYR (Y)43.28%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC596
HydrogenH909
NitrogenN153
OxygenO168
SulphurS14

FormulaC596H909N153O168S14
Total Number of Atoms:1840


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    12085
Absorption 0.1% (=1 g/l)    0.905,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    0.858,   assuming all CYS residues are reduced
Aromaticity:0.115

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.97

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.79, 20.49, 24.59]

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:84.754
Grand average of hydropathicity (GRAVY):0.40