Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5650
Number of amino acids:490
Molecular Weight:53824.15 Da
Theoretical pI:6.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)336.73%
Cysteine CYS (C)51.02%
Glutamic Acid GLU (E)234.69%
Aspartic Acid ASP (D)204.08%
Glycine GLY (G)489.8%
Phynylalanine PHE (F)214.29%
Isoleucine ILE (I)234.69%
Histidine HIS (H)112.24%
Lysine LYS (K)132.65%
Methionine MET (M)40.82%
Leucine LEU (L)448.98%
Asparagine ASN (N)285.71%
Glutamine GLN (Q)5511.22%
Proline PRO (P)265.31%
Serine SER (S)387.76%
Arginine ARG (R)295.92%
Threonine THR (T)214.29%
Tryptophan TRP (W)51.02%
Valine VAL (V)336.73%
Tyrosine TYR (Y)102.04%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2359
HydrogenH3704
NitrogenN700
OxygenO729
SulphurS9

FormulaC2359H3704N700O729S9
Total Number of Atoms:7501


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):43
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    42650
Absorption 0.1% (=1 g/l)    0.792,   assuming all pairs of CYS residues form cystines

Ext. coefficient    42400
Absorption 0.1% (=1 g/l)    0.788,   assuming all CYS residues are reduced
Aromaticity:0.073

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 48.17

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.76, 28.57, 21.22]

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:79.5918
Grand average of hydropathicity (GRAVY):-0.48