Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4450
Number of amino acids:646
Molecular Weight:71611.05 Da
Theoretical pI:8.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)416.35%
Cysteine CYS (C)152.32%
Glutamic Acid GLU (E)314.8%
Aspartic Acid ASP (D)314.8%
Glycine GLY (G)507.74%
Phynylalanine PHE (F)335.11%
Isoleucine ILE (I)304.64%
Histidine HIS (H)121.86%
Lysine LYS (K)385.88%
Methionine MET (M)152.32%
Leucine LEU (L)6510.06%
Asparagine ASN (N)406.19%
Glutamine GLN (Q)243.72%
Proline PRO (P)203.1%
Serine SER (S)507.74%
Arginine ARG (R)335.11%
Threonine THR (T)375.73%
Tryptophan TRP (W)40.62%
Valine VAL (V)558.51%
Tyrosine TYR (Y)223.41%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3182
HydrogenH5031
NitrogenN875
OxygenO944
SulphurS30

FormulaC3182H5031N875O944S30
Total Number of Atoms:10062


Total number of positively charged residues (ARG + LYS):71
Total number of negatively charged residues (ASP + GLU):62
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    55655
Absorption 0.1% (=1 g/l)    0.777,   assuming all pairs of CYS residues form cystines

Ext. coefficient    54780
Absorption 0.1% (=1 g/l)    0.765,   assuming all CYS residues are reduced
Aromaticity:0.091

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.00

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.35, 24.77, 23.53]

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:88.39
Grand average of hydropathicity (GRAVY):-0.12