Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4399
Number of amino acids:793
Molecular Weight:88754.1 Da
Theoretical pI:5.82


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)394.92%
Cysteine CYS (C)313.91%
Glutamic Acid GLU (E)688.58%
Aspartic Acid ASP (D)364.54%
Glycine GLY (G)556.94%
Phynylalanine PHE (F)324.04%
Isoleucine ILE (I)516.43%
Histidine HIS (H)131.64%
Lysine LYS (K)526.56%
Methionine MET (M)151.89%
Leucine LEU (L)637.94%
Asparagine ASN (N)394.92%
Glutamine GLN (Q)192.4%
Proline PRO (P)253.15%
Serine SER (S)688.58%
Arginine ARG (R)415.17%
Threonine THR (T)526.56%
Tryptophan TRP (W)70.88%
Valine VAL (V)587.31%
Tyrosine TYR (Y)293.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3903
HydrogenH6175
NitrogenN1059
OxygenO1209
SulphurS46

FormulaC3903H6175N1059O1209S46
Total Number of Atoms:12392


Total number of positively charged residues (ARG + LYS):93
Total number of negatively charged residues (ASP + GLU):104
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    83585
Absorption 0.1% (=1 g/l)    0.942,   assuming all pairs of CYS residues form cystines

Ext. coefficient    81710
Absorption 0.1% (=1 g/l)    0.921,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.23

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.26, 23.58, 23.33]

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:82.1942
Grand average of hydropathicity (GRAVY):-0.27