Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4010
Number of amino acids:158
Molecular Weight:16599.73 Da
Theoretical pI:9.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1912.03%
Cysteine CYS (C)21.27%
Glutamic Acid GLU (E)138.23%
Aspartic Acid ASP (D)63.8%
Glycine GLY (G)2415.19%
Phynylalanine PHE (F)42.53%
Isoleucine ILE (I)21.27%
Histidine HIS (H)10.63%
Lysine LYS (K)21.27%
Methionine MET (M)10.63%
Leucine LEU (L)127.59%
Asparagine ASN (N)31.9%
Glutamine GLN (Q)42.53%
Proline PRO (P)53.16%
Serine SER (S)106.33%
Arginine ARG (R)2113.29%
Threonine THR (T)42.53%
Tryptophan TRP (W)10.63%
Valine VAL (V)2213.92%
Tyrosine TYR (Y)21.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC711
HydrogenH1171
NitrogenN233
OxygenO220
SulphurS3

FormulaC711H1171N233O220S3
Total Number of Atoms:2338


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8605
Absorption 0.1% (=1 g/l)    0.518,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.511,   assuming all CYS residues are reduced
Aromaticity:0.044

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 56.42

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.22, 26.58, 28.48]

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:86.9622
Grand average of hydropathicity (GRAVY):-0.18