Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5871
Number of amino acids:424
Molecular Weight:48309.02 Da
Theoretical pI:4.47


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)358.25%
Cysteine CYS (C)30.71%
Glutamic Acid GLU (E)4510.61%
Aspartic Acid ASP (D)5813.68%
Glycine GLY (G)255.9%
Phynylalanine PHE (F)153.54%
Isoleucine ILE (I)245.66%
Histidine HIS (H)92.12%
Lysine LYS (K)5212.26%
Methionine MET (M)40.94%
Leucine LEU (L)204.72%
Asparagine ASN (N)122.83%
Glutamine GLN (Q)112.59%
Proline PRO (P)266.13%
Serine SER (S)204.72%
Arginine ARG (R)40.94%
Threonine THR (T)174.01%
Tryptophan TRP (W)133.07%
Valine VAL (V)143.3%
Tyrosine TYR (Y)174.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2157
HydrogenH3232
NitrogenN542
OxygenO708
SulphurS7

FormulaC2157H3232N542O708S7
Total Number of Atoms:6646


Total number of positively charged residues (ARG + LYS):56
Total number of negatively charged residues (ASP + GLU):103
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    96955
Absorption 0.1% (=1 g/l)    2.007,   assuming all pairs of CYS residues form cystines

Ext. coefficient    96830
Absorption 0.1% (=1 g/l)    2.004,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.75

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.29, 19.58, 24.53]

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:58.3019
Grand average of hydropathicity (GRAVY):-1.04