Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4384
Number of amino acids:420
Molecular Weight:47327.74 Da
Theoretical pI:4.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)337.86%
Cysteine CYS (C)20.48%
Glutamic Acid GLU (E)4210%
Aspartic Acid ASP (D)5112.14%
Glycine GLY (G)296.9%
Phynylalanine PHE (F)153.57%
Isoleucine ILE (I)225.24%
Histidine HIS (H)61.43%
Lysine LYS (K)5312.62%
Methionine MET (M)81.9%
Leucine LEU (L)194.52%
Asparagine ASN (N)81.9%
Glutamine GLN (Q)71.67%
Proline PRO (P)276.43%
Serine SER (S)204.76%
Arginine ARG (R)30.71%
Threonine THR (T)215%
Tryptophan TRP (W)143.33%
Valine VAL (V)255.95%
Tyrosine TYR (Y)153.57%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2130
HydrogenH3225
NitrogenN523
OxygenO678
SulphurS10

FormulaC2130H3225N523O678S10
Total Number of Atoms:6566


Total number of positively charged residues (ARG + LYS):56
Total number of negatively charged residues (ASP + GLU):93
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    99475
Absorption 0.1% (=1 g/l)    2.102,   assuming all pairs of CYS residues form cystines

Ext. coefficient    99350
Absorption 0.1% (=1 g/l)    2.099,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.10

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.19, 20.00, 24.29]

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:63.1905
Grand average of hydropathicity (GRAVY):-0.80