Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4398
Number of amino acids:665
Molecular Weight:74355.31 Da
Theoretical pI:8.47


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)314.66%
Cysteine CYS (C)152.26%
Glutamic Acid GLU (E)355.26%
Aspartic Acid ASP (D)334.96%
Glycine GLY (G)426.32%
Phynylalanine PHE (F)334.96%
Isoleucine ILE (I)436.47%
Histidine HIS (H)121.8%
Lysine LYS (K)395.86%
Methionine MET (M)182.71%
Leucine LEU (L)6710.08%
Asparagine ASN (N)395.86%
Glutamine GLN (Q)203.01%
Proline PRO (P)263.91%
Serine SER (S)7110.68%
Arginine ARG (R)355.26%
Threonine THR (T)334.96%
Tryptophan TRP (W)60.9%
Valine VAL (V)477.07%
Tyrosine TYR (Y)203.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3304
HydrogenH5234
NitrogenN898
OxygenO985
SulphurS33

FormulaC3304H5234N898O985S33
Total Number of Atoms:10454


Total number of positively charged residues (ARG + LYS):74
Total number of negatively charged residues (ASP + GLU):68
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    63675
Absorption 0.1% (=1 g/l)    0.856,   assuming all pairs of CYS residues form cystines

Ext. coefficient    62800
Absorption 0.1% (=1 g/l)    0.845,   assuming all CYS residues are reduced
Aromaticity:0.089

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.64

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.48, 26.77, 22.71]

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:89.6692
Grand average of hydropathicity (GRAVY):-0.15