Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5853
Number of amino acids:148
Molecular Weight:16792.46 Da
Theoretical pI:9.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)74.73%
Cysteine CYS (C)106.76%
Glutamic Acid GLU (E)85.41%
Aspartic Acid ASP (D)42.7%
Glycine GLY (G)1610.81%
Phynylalanine PHE (F)74.73%
Isoleucine ILE (I)42.7%
Histidine HIS (H)10.68%
Lysine LYS (K)117.43%
Methionine MET (M)42.7%
Leucine LEU (L)128.11%
Asparagine ASN (N)21.35%
Glutamine GLN (Q)117.43%
Proline PRO (P)74.73%
Serine SER (S)106.76%
Arginine ARG (R)96.08%
Threonine THR (T)64.05%
Tryptophan TRP (W)64.05%
Valine VAL (V)85.41%
Tyrosine TYR (Y)53.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC747
HydrogenH1151
NitrogenN207
OxygenO207
SulphurS14

FormulaC747H1151N207O207S14
Total Number of Atoms:2326


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    41075
Absorption 0.1% (=1 g/l)    2.446,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40450
Absorption 0.1% (=1 g/l)    2.409,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.91

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.38, 23.65, 20.95]

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:62.5676
Grand average of hydropathicity (GRAVY):-0.36