Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4167
Number of amino acids:779
Molecular Weight:86342.05 Da
Theoretical pI:5.14


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)496.29%
Cysteine CYS (C)192.44%
Glutamic Acid GLU (E)496.29%
Aspartic Acid ASP (D)364.62%
Glycine GLY (G)719.11%
Phynylalanine PHE (F)384.88%
Isoleucine ILE (I)425.39%
Histidine HIS (H)162.05%
Lysine LYS (K)405.13%
Methionine MET (M)192.44%
Leucine LEU (L)536.8%
Asparagine ASN (N)607.7%
Glutamine GLN (Q)243.08%
Proline PRO (P)334.24%
Serine SER (S)546.93%
Arginine ARG (R)202.57%
Threonine THR (T)546.93%
Tryptophan TRP (W)182.31%
Valine VAL (V)516.55%
Tyrosine TYR (Y)334.24%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3851
HydrogenH5835
NitrogenN1013
OxygenO1175
SulphurS38

FormulaC3851H5835N1013O1175S38
Total Number of Atoms:11912


Total number of positively charged residues (ARG + LYS):60
Total number of negatively charged residues (ASP + GLU):85
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    149295
Absorption 0.1% (=1 g/l)    1.729,   assuming all pairs of CYS residues form cystines

Ext. coefficient    148170
Absorption 0.1% (=1 g/l)    1.716,   assuming all CYS residues are reduced
Aromaticity:0.114

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.30

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.17, 27.98, 21.82]

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:72.837
Grand average of hydropathicity (GRAVY):-0.29