Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5586
Number of amino acids:313
Molecular Weight:34295.81 Da
Theoretical pI:8.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)206.39%
Cysteine CYS (C)20.64%
Glutamic Acid GLU (E)154.79%
Aspartic Acid ASP (D)144.47%
Glycine GLY (G)237.35%
Phynylalanine PHE (F)154.79%
Isoleucine ILE (I)309.58%
Histidine HIS (H)10.32%
Lysine LYS (K)257.99%
Methionine MET (M)51.6%
Leucine LEU (L)227.03%
Asparagine ASN (N)196.07%
Glutamine GLN (Q)165.11%
Proline PRO (P)247.67%
Serine SER (S)165.11%
Arginine ARG (R)82.56%
Threonine THR (T)165.11%
Tryptophan TRP (W)10.32%
Valine VAL (V)319.9%
Tyrosine TYR (Y)103.19%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1563
HydrogenH2492
NitrogenN400
OxygenO449
SulphurS7

FormulaC1563H2492N400O449S7
Total Number of Atoms:4911


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):29
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    20525
Absorption 0.1% (=1 g/l)    0.598,   assuming all pairs of CYS residues form cystines

Ext. coefficient    20400
Absorption 0.1% (=1 g/l)    0.595,   assuming all CYS residues are reduced
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.89

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.82, 26.20, 19.81]

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:99.9041
Grand average of hydropathicity (GRAVY):-0.02