Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4790
Number of amino acids:273
Molecular Weight:30218.76 Da
Theoretical pI:8.81


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)207.33%
Cysteine CYS (C)82.93%
Glutamic Acid GLU (E)51.83%
Aspartic Acid ASP (D)145.13%
Glycine GLY (G)3111.36%
Phynylalanine PHE (F)145.13%
Isoleucine ILE (I)176.23%
Histidine HIS (H)31.1%
Lysine LYS (K)176.23%
Methionine MET (M)103.66%
Leucine LEU (L)155.49%
Asparagine ASN (N)165.86%
Glutamine GLN (Q)93.3%
Proline PRO (P)134.76%
Serine SER (S)93.3%
Arginine ARG (R)82.93%
Threonine THR (T)238.42%
Tryptophan TRP (W)93.3%
Valine VAL (V)186.59%
Tyrosine TYR (Y)145.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1371
HydrogenH2072
NitrogenN354
OxygenO383
SulphurS18

FormulaC1371H2072N354O383S18
Total Number of Atoms:4198


Total number of positively charged residues (ARG + LYS):25
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    70860
Absorption 0.1% (=1 g/l)    2.345,   assuming all pairs of CYS residues form cystines

Ext. coefficient    70360
Absorption 0.1% (=1 g/l)    2.328,   assuming all CYS residues are reduced
Aromaticity:0.136

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 18.78

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.87, 25.27, 18.32]

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:72.1612
Grand average of hydropathicity (GRAVY):-0.09