Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5719
Number of amino acids:302
Molecular Weight:34300.08 Da
Theoretical pI:7.73


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)134.3%
Cysteine CYS (C)92.98%
Glutamic Acid GLU (E)20.66%
Aspartic Acid ASP (D)41.32%
Glycine GLY (G)82.65%
Phynylalanine PHE (F)165.3%
Isoleucine ILE (I)185.96%
Histidine HIS (H)72.32%
Lysine LYS (K)30.99%
Methionine MET (M)72.32%
Leucine LEU (L)216.95%
Asparagine ASN (N)72.32%
Glutamine GLN (Q)9029.8%
Proline PRO (P)5016.56%
Serine SER (S)134.3%
Arginine ARG (R)41.32%
Threonine THR (T)144.64%
Tryptophan TRP (W)10.33%
Valine VAL (V)123.97%
Tyrosine TYR (Y)30.99%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1526
HydrogenH2359
NitrogenN429
OxygenO442
SulphurS16

FormulaC1526H2359N429O442S16
Total Number of Atoms:4772


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10470
Absorption 0.1% (=1 g/l)    0.305,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.291,   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 : 99.09

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.51, 25.83, 14.24]

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:66.192
Grand average of hydropathicity (GRAVY):-0.68