Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4682
Number of amino acids:390
Molecular Weight:45014.09 Da
Theoretical pI:9.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)153.85%
Cysteine CYS (C)71.79%
Glutamic Acid GLU (E)287.18%
Aspartic Acid ASP (D)225.64%
Glycine GLY (G)153.85%
Phynylalanine PHE (F)235.9%
Isoleucine ILE (I)235.9%
Histidine HIS (H)92.31%
Lysine LYS (K)215.38%
Methionine MET (M)61.54%
Leucine LEU (L)4110.51%
Asparagine ASN (N)225.64%
Glutamine GLN (Q)102.56%
Proline PRO (P)102.56%
Serine SER (S)4611.79%
Arginine ARG (R)379.49%
Threonine THR (T)235.9%
Tryptophan TRP (W)51.28%
Valine VAL (V)215.38%
Tyrosine TYR (Y)61.54%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1979
HydrogenH3153
NitrogenN577
OxygenO598
SulphurS13

FormulaC1979H3153N577O598S13
Total Number of Atoms:6320


Total number of positively charged residues (ARG + LYS):58
Total number of negatively charged residues (ASP + GLU):50
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    36815
Absorption 0.1% (=1 g/l)    0.818,   assuming all pairs of CYS residues form cystines

Ext. coefficient    36440
Absorption 0.1% (=1 g/l)    0.810,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 66.71

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.51, 23.85, 23.08]

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:83.4615
Grand average of hydropathicity (GRAVY):-0.47