Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5740
Number of amino acids:331
Molecular Weight:35678.88 Da
Theoretical pI:9.47


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)226.65%
Cysteine CYS (C)82.42%
Glutamic Acid GLU (E)144.23%
Aspartic Acid ASP (D)175.14%
Glycine GLY (G)3510.57%
Phynylalanine PHE (F)144.23%
Isoleucine ILE (I)144.23%
Histidine HIS (H)61.81%
Lysine LYS (K)113.32%
Methionine MET (M)41.21%
Leucine LEU (L)339.97%
Asparagine ASN (N)144.23%
Glutamine GLN (Q)103.02%
Proline PRO (P)154.53%
Serine SER (S)267.85%
Arginine ARG (R)309.06%
Threonine THR (T)195.74%
Tryptophan TRP (W)20.6%
Valine VAL (V)3510.57%
Tyrosine TYR (Y)20.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1558
HydrogenH2538
NitrogenN470
OxygenO465
SulphurS12

FormulaC1558H2538N470O465S12
Total Number of Atoms:5043


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14480
Absorption 0.1% (=1 g/l)    0.406,   assuming all pairs of CYS residues form cystines

Ext. coefficient    13980
Absorption 0.1% (=1 g/l)    0.392,   assuming all CYS residues are reduced
Aromaticity:0.054

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 48.79

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.21, 27.19, 22.05]

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:92.6888
Grand average of hydropathicity (GRAVY):-0.07