Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5819
Number of amino acids:206
Molecular Weight:23930.32 Da
Theoretical pI:5.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)136.31%
Cysteine CYS (C)31.46%
Glutamic Acid GLU (E)157.28%
Aspartic Acid ASP (D)104.85%
Glycine GLY (G)157.28%
Phynylalanine PHE (F)125.83%
Isoleucine ILE (I)146.8%
Histidine HIS (H)31.46%
Lysine LYS (K)136.31%
Methionine MET (M)52.43%
Leucine LEU (L)167.77%
Asparagine ASN (N)104.85%
Glutamine GLN (Q)83.88%
Proline PRO (P)83.88%
Serine SER (S)104.85%
Arginine ARG (R)73.4%
Threonine THR (T)104.85%
Tryptophan TRP (W)94.37%
Valine VAL (V)136.31%
Tyrosine TYR (Y)125.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1106
HydrogenH1641
NitrogenN273
OxygenO307
SulphurS8

FormulaC1106H1641N273O307S8
Total Number of Atoms:3335


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    67505
Absorption 0.1% (=1 g/l)    2.821,   assuming all pairs of CYS residues form cystines

Ext. coefficient    67380
Absorption 0.1% (=1 g/l)    2.816,   assuming all CYS residues are reduced
Aromaticity:0.160

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.80

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.89, 20.87, 23.79]

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:81.4078
Grand average of hydropathicity (GRAVY):-0.23