Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1229
Number of amino acids:247
Molecular Weight:26622.02 Da
Theoretical pI:6.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.48%
Cysteine CYS (C)166.48%
Glutamic Acid GLU (E)52.02%
Aspartic Acid ASP (D)124.86%
Glycine GLY (G)3012.15%
Phynylalanine PHE (F)176.88%
Isoleucine ILE (I)93.64%
Histidine HIS (H)10.4%
Lysine LYS (K)52.02%
Methionine MET (M)52.02%
Leucine LEU (L)114.45%
Asparagine ASN (N)156.07%
Glutamine GLN (Q)104.05%
Proline PRO (P)208.1%
Serine SER (S)145.67%
Arginine ARG (R)124.86%
Threonine THR (T)239.31%
Tryptophan TRP (W)52.02%
Valine VAL (V)135.26%
Tyrosine TYR (Y)83.24%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1171
HydrogenH1756
NitrogenN320
OxygenO352
SulphurS21

FormulaC1171H1756N320O352S21
Total Number of Atoms:3620


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40420
Absorption 0.1% (=1 g/l)    1.518,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39420
Absorption 0.1% (=1 g/l)    1.481,   assuming all CYS residues are reduced
Aromaticity:0.121

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.17

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.51, 31.98, 14.98]

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:53.3198
Grand average of hydropathicity (GRAVY):-0.19