Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4051
Number of amino acids:304
Molecular Weight:33946.81 Da
Theoretical pI:9.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3210.53%
Cysteine CYS (C)51.64%
Glutamic Acid GLU (E)30.99%
Aspartic Acid ASP (D)237.57%
Glycine GLY (G)299.54%
Phynylalanine PHE (F)144.61%
Isoleucine ILE (I)113.62%
Histidine HIS (H)82.63%
Lysine LYS (K)196.25%
Methionine MET (M)92.96%
Leucine LEU (L)237.57%
Asparagine ASN (N)144.61%
Glutamine GLN (Q)72.3%
Proline PRO (P)123.95%
Serine SER (S)134.28%
Arginine ARG (R)185.92%
Threonine THR (T)165.26%
Tryptophan TRP (W)82.63%
Valine VAL (V)227.24%
Tyrosine TYR (Y)185.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1535
HydrogenH2332
NitrogenN422
OxygenO425
SulphurS14

FormulaC1535H2332N422O425S14
Total Number of Atoms:4728


Total number of positively charged residues (ARG + LYS):37
Total number of negatively charged residues (ASP + GLU):26
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    71070
Absorption 0.1% (=1 g/l)    2.094,   assuming all pairs of CYS residues form cystines

Ext. coefficient    70820
Absorption 0.1% (=1 g/l)    2.086,   assuming all CYS residues are reduced
Aromaticity:0.132

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.95

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.58, 22.37, 22.04]

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:75.1316
Grand average of hydropathicity (GRAVY):-0.24