Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5253
Number of amino acids:145
Molecular Weight:15499.73 Da
Theoretical pI:5.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1510.34%
Cysteine CYS (C)106.9%
Glutamic Acid GLU (E)74.83%
Aspartic Acid ASP (D)74.83%
Glycine GLY (G)117.59%
Phynylalanine PHE (F)32.07%
Isoleucine ILE (I)42.76%
Histidine HIS (H)32.07%
Lysine LYS (K)53.45%
Methionine MET (M)21.38%
Leucine LEU (L)138.97%
Asparagine ASN (N)32.07%
Glutamine GLN (Q)74.83%
Proline PRO (P)138.97%
Serine SER (S)106.9%
Arginine ARG (R)74.83%
Threonine THR (T)85.52%
Tryptophan TRP (W)10.69%
Valine VAL (V)117.59%
Tyrosine TYR (Y)53.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC674
HydrogenH1066
NitrogenN188
OxygenO207
SulphurS12

FormulaC674H1066N188O207S12
Total Number of Atoms:2147


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13575
Absorption 0.1% (=1 g/l)    0.876,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.835,   assuming all CYS residues are reduced
Aromaticity:0.062

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.16

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.52, 25.52, 25.52]

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:78.069
Grand average of hydropathicity (GRAVY):-0.09