Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5611
Number of amino acids:261
Molecular Weight:28685.6 Da
Theoretical pI:9.1


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)249.2%
Cysteine CYS (C)72.68%
Glutamic Acid GLU (E)51.92%
Aspartic Acid ASP (D)114.21%
Glycine GLY (G)269.96%
Phynylalanine PHE (F)114.21%
Isoleucine ILE (I)93.45%
Histidine HIS (H)62.3%
Lysine LYS (K)72.68%
Methionine MET (M)93.45%
Leucine LEU (L)166.13%
Asparagine ASN (N)176.51%
Glutamine GLN (Q)124.6%
Proline PRO (P)166.13%
Serine SER (S)166.13%
Arginine ARG (R)166.13%
Threonine THR (T)145.36%
Tryptophan TRP (W)62.3%
Valine VAL (V)218.05%
Tyrosine TYR (Y)124.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1273
HydrogenH1943
NitrogenN363
OxygenO365
SulphurS16

FormulaC1273H1943N363O365S16
Total Number of Atoms:3960


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    51255
Absorption 0.1% (=1 g/l)    1.787,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50880
Absorption 0.1% (=1 g/l)    1.774,   assuming all CYS residues are reduced
Aromaticity:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.93

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.74, 28.74, 20.69]

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:69.8851
Grand average of hydropathicity (GRAVY):-0.22