Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5514
Number of amino acids:330
Molecular Weight:36689.29 Da
Theoretical pI:8.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)103.03%
Cysteine CYS (C)113.33%
Glutamic Acid GLU (E)92.73%
Aspartic Acid ASP (D)185.45%
Glycine GLY (G)216.36%
Phynylalanine PHE (F)185.45%
Isoleucine ILE (I)226.67%
Histidine HIS (H)61.82%
Lysine LYS (K)216.36%
Methionine MET (M)41.21%
Leucine LEU (L)5015.15%
Asparagine ASN (N)247.27%
Glutamine GLN (Q)123.64%
Proline PRO (P)195.76%
Serine SER (S)319.39%
Arginine ARG (R)92.73%
Threonine THR (T)267.88%
Tryptophan TRP (W)51.52%
Valine VAL (V)82.42%
Tyrosine TYR (Y)61.82%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1649
HydrogenH2601
NitrogenN431
OxygenO484
SulphurS15

FormulaC1649H2601N431O484S15
Total Number of Atoms:5180


Total number of positively charged residues (ARG + LYS):30
Total number of negatively charged residues (ASP + GLU):27
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    37065
Absorption 0.1% (=1 g/l)    1.010,   assuming all pairs of CYS residues form cystines

Ext. coefficient    36440
Absorption 0.1% (=1 g/l)    0.993,   assuming all CYS residues are reduced
Aromaticity:0.088

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.84

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.03, 28.79, 22.12]

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:95.1515
Grand average of hydropathicity (GRAVY):-0.09