Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5075
Number of amino acids:431
Molecular Weight:49898.87 Da
Theoretical pI:8.4


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)184.18%
Cysteine CYS (C)51.16%
Glutamic Acid GLU (E)245.57%
Aspartic Acid ASP (D)276.26%
Glycine GLY (G)317.19%
Phynylalanine PHE (F)296.73%
Isoleucine ILE (I)204.64%
Histidine HIS (H)133.02%
Lysine LYS (K)337.66%
Methionine MET (M)102.32%
Leucine LEU (L)409.28%
Asparagine ASN (N)255.8%
Glutamine GLN (Q)184.18%
Proline PRO (P)143.25%
Serine SER (S)276.26%
Arginine ARG (R)214.87%
Threonine THR (T)204.64%
Tryptophan TRP (W)122.78%
Valine VAL (V)296.73%
Tyrosine TYR (Y)153.48%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2265
HydrogenH3446
NitrogenN608
OxygenO639
SulphurS15

FormulaC2265H3446N608O639S15
Total Number of Atoms:6973


Total number of positively charged residues (ARG + LYS):54
Total number of negatively charged residues (ASP + GLU):51
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    88600
Absorption 0.1% (=1 g/l)    1.776,   assuming all pairs of CYS residues form cystines

Ext. coefficient    88350
Absorption 0.1% (=1 g/l)    1.771,   assuming all CYS residues are reduced
Aromaticity:0.130

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.19

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.64, 22.51, 21.35]

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:77.9814
Grand average of hydropathicity (GRAVY):-0.43