Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5635
Number of amino acids:163
Molecular Weight:17568.13 Da
Theoretical pI:7.07


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2012.27%
Cysteine CYS (C)106.13%
Glutamic Acid GLU (E)63.68%
Aspartic Acid ASP (D)84.91%
Glycine GLY (G)169.82%
Phynylalanine PHE (F)31.84%
Isoleucine ILE (I)31.84%
Histidine HIS (H)53.07%
Lysine LYS (K)10.61%
Methionine MET (M)53.07%
Leucine LEU (L)148.59%
Asparagine ASN (N)31.84%
Glutamine GLN (Q)74.29%
Proline PRO (P)116.75%
Serine SER (S)95.52%
Arginine ARG (R)137.98%
Threonine THR (T)63.68%
Tryptophan TRP (W)31.84%
Valine VAL (V)148.59%
Tyrosine TYR (Y)63.68%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC762
HydrogenH1192
NitrogenN226
OxygenO223
SulphurS15

FormulaC762H1192N226O223S15
Total Number of Atoms:2418


Total number of positively charged residues (ARG + LYS):14
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    26065
Absorption 0.1% (=1 g/l)    1.484,   assuming all pairs of CYS residues form cystines

Ext. coefficient    25440
Absorption 0.1% (=1 g/l)    1.448,   assuming all CYS residues are reduced
Aromaticity:0.074

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.45

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.38, 23.93, 27.61]

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:77.8527
Grand average of hydropathicity (GRAVY):-0.02