Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1042
Number of amino acids:117
Molecular Weight:12896.02 Da
Theoretical pI:5.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1210.26%
Cysteine CYS (C)119.4%
Glutamic Acid GLU (E)54.27%
Aspartic Acid ASP (D)65.13%
Glycine GLY (G)75.98%
Phynylalanine PHE (F)97.69%
Isoleucine ILE (I)65.13%
Histidine HIS (H)54.27%
Lysine LYS (K)65.13%
Methionine MET (M)32.56%
Leucine LEU (L)97.69%
Asparagine ASN (N)54.27%
Glutamine GLN (Q)21.71%
Proline PRO (P)43.42%
Serine SER (S)65.13%
Arginine ARG (R)21.71%
Threonine THR (T)43.42%
Tryptophan TRP (W)10.85%
Valine VAL (V)108.55%
Tyrosine TYR (Y)43.42%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC577
HydrogenH875
NitrogenN147
OxygenO161
SulphurS14

FormulaC577H875N147O161S14
Total Number of Atoms:1774


Total number of positively charged residues (ARG + LYS):8
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)    0.937,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    0.889,   assuming all CYS residues are reduced
Aromaticity:0.120

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 18.80, 24.79]

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:85.0428
Grand average of hydropathicity (GRAVY):0.42