Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4235
Number of amino acids:343
Molecular Weight:37722.64 Da
Theoretical pI:5.12


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)339.62%
Cysteine CYS (C)30.87%
Glutamic Acid GLU (E)144.08%
Aspartic Acid ASP (D)164.66%
Glycine GLY (G)257.29%
Phynylalanine PHE (F)195.54%
Isoleucine ILE (I)277.87%
Histidine HIS (H)61.75%
Lysine LYS (K)154.37%
Methionine MET (M)61.75%
Leucine LEU (L)298.45%
Asparagine ASN (N)3510.2%
Glutamine GLN (Q)195.54%
Proline PRO (P)195.54%
Serine SER (S)195.54%
Arginine ARG (R)61.75%
Threonine THR (T)133.79%
Tryptophan TRP (W)20.58%
Valine VAL (V)205.83%
Tyrosine TYR (Y)174.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1705
HydrogenH2604
NitrogenN444
OxygenO507
SulphurS9

FormulaC1705H2604N444O507S9
Total Number of Atoms:5269


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):30
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    36455
Absorption 0.1% (=1 g/l)    0.966,   assuming all pairs of CYS residues form cystines

Ext. coefficient    36330
Absorption 0.1% (=1 g/l)    0.963,   assuming all CYS residues are reduced
Aromaticity:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.30

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.24, 28.57, 23.91]

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:90.2041
Grand average of hydropathicity (GRAVY):-0.12