Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5755
Number of amino acids:166
Molecular Weight:17864.56 Da
Theoretical pI:8.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1810.84%
Cysteine CYS (C)106.02%
Glutamic Acid GLU (E)53.01%
Aspartic Acid ASP (D)95.42%
Glycine GLY (G)1810.84%
Phynylalanine PHE (F)31.81%
Isoleucine ILE (I)42.41%
Histidine HIS (H)63.61%
Lysine LYS (K)31.81%
Methionine MET (M)63.61%
Leucine LEU (L)137.83%
Asparagine ASN (N)42.41%
Glutamine GLN (Q)63.61%
Proline PRO (P)106.02%
Serine SER (S)84.82%
Arginine ARG (R)137.83%
Threonine THR (T)63.61%
Tryptophan TRP (W)21.2%
Valine VAL (V)169.64%
Tyrosine TYR (Y)63.61%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC772
HydrogenH1220
NitrogenN232
OxygenO225
SulphurS16

FormulaC772H1220N232O225S16
Total Number of Atoms:2465


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    20565
Absorption 0.1% (=1 g/l)    1.151,   assuming all pairs of CYS residues form cystines

Ext. coefficient    19940
Absorption 0.1% (=1 g/l)    1.116,   assuming all CYS residues are reduced
Aromaticity:0.066

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.72

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.51, 24.10, 25.30]

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:78.735
Grand average of hydropathicity (GRAVY):-0.03