Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4218
Number of amino acids:411
Molecular Weight:46290.39 Da
Theoretical pI:5.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)235.6%
Cysteine CYS (C)40.97%
Glutamic Acid GLU (E)215.11%
Aspartic Acid ASP (D)245.84%
Glycine GLY (G)358.52%
Phynylalanine PHE (F)266.33%
Isoleucine ILE (I)286.81%
Histidine HIS (H)51.22%
Lysine LYS (K)225.35%
Methionine MET (M)71.7%
Leucine LEU (L)327.79%
Asparagine ASN (N)276.57%
Glutamine GLN (Q)143.41%
Proline PRO (P)174.14%
Serine SER (S)256.08%
Arginine ARG (R)184.38%
Threonine THR (T)307.3%
Tryptophan TRP (W)81.95%
Valine VAL (V)266.33%
Tyrosine TYR (Y)194.62%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2098
HydrogenH3194
NitrogenN546
OxygenO617
SulphurS11

FormulaC2098H3194N546O617S11
Total Number of Atoms:6466


Total number of positively charged residues (ARG + LYS):40
Total number of negatively charged residues (ASP + GLU):45
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    72560
Absorption 0.1% (=1 g/l)    1.567,   assuming all pairs of CYS residues form cystines

Ext. coefficient    72310
Absorption 0.1% (=1 g/l)    1.562,   assuming all CYS residues are reduced
Aromaticity:0.129

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.21

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.82, 25.30, 20.19]

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:80.8759
Grand average of hydropathicity (GRAVY):-0.25