Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4315
Number of amino acids:397
Molecular Weight:44082.09 Da
Theoretical pI:6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)246.05%
Cysteine CYS (C)123.02%
Glutamic Acid GLU (E)143.53%
Aspartic Acid ASP (D)297.3%
Glycine GLY (G)379.32%
Phynylalanine PHE (F)153.78%
Isoleucine ILE (I)287.05%
Histidine HIS (H)133.27%
Lysine LYS (K)184.53%
Methionine MET (M)123.02%
Leucine LEU (L)266.55%
Asparagine ASN (N)235.79%
Glutamine GLN (Q)184.53%
Proline PRO (P)174.28%
Serine SER (S)194.79%
Arginine ARG (R)184.53%
Threonine THR (T)266.55%
Tryptophan TRP (W)102.52%
Valine VAL (V)297.3%
Tyrosine TYR (Y)92.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1945
HydrogenH3016
NitrogenN546
OxygenO579
SulphurS24

FormulaC1945H3016N546O579S24
Total Number of Atoms:6110


Total number of positively charged residues (ARG + LYS):36
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    69160
Absorption 0.1% (=1 g/l)    1.569,   assuming all pairs of CYS residues form cystines

Ext. coefficient    68410
Absorption 0.1% (=1 g/l)    1.552,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.47, 24.18, 19.14]

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:80.2771
Grand average of hydropathicity (GRAVY):-0.25