Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5332
Number of amino acids:639
Molecular Weight:74325.34 Da
Theoretical pI:5.47


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)284.38%
Cysteine CYS (C)50.78%
Glutamic Acid GLU (E)8112.68%
Aspartic Acid ASP (D)294.54%
Glycine GLY (G)314.85%
Phynylalanine PHE (F)325.01%
Isoleucine ILE (I)294.54%
Histidine HIS (H)223.44%
Lysine LYS (K)426.57%
Methionine MET (M)60.94%
Leucine LEU (L)497.67%
Asparagine ASN (N)426.57%
Glutamine GLN (Q)548.45%
Proline PRO (P)355.48%
Serine SER (S)477.36%
Arginine ARG (R)436.73%
Threonine THR (T)142.19%
Tryptophan TRP (W)30.47%
Valine VAL (V)325.01%
Tyrosine TYR (Y)152.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3248
HydrogenH5061
NitrogenN953
OxygenO1032
SulphurS11

FormulaC3248H5061N953O1032S11
Total Number of Atoms:10305


Total number of positively charged residues (ARG + LYS):85
Total number of negatively charged residues (ASP + GLU):110
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39100
Absorption 0.1% (=1 g/l)    0.526,   assuming all pairs of CYS residues form cystines

Ext. coefficient    38850
Absorption 0.1% (=1 g/l)    0.523,   assuming all CYS residues are reduced
Aromaticity:0.078

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 67.76

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.04, 24.26, 25.67]

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:66.5102
Grand average of hydropathicity (GRAVY):-1.05