Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4720
Number of amino acids:389
Molecular Weight:43551.71 Da
Theoretical pI:8.03


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)184.63%
Cysteine CYS (C)92.31%
Glutamic Acid GLU (E)215.4%
Aspartic Acid ASP (D)133.34%
Glycine GLY (G)307.71%
Phynylalanine PHE (F)266.68%
Isoleucine ILE (I)112.83%
Histidine HIS (H)30.77%
Lysine LYS (K)235.91%
Methionine MET (M)61.54%
Leucine LEU (L)4611.83%
Asparagine ASN (N)256.43%
Glutamine GLN (Q)133.34%
Proline PRO (P)256.43%
Serine SER (S)307.71%
Arginine ARG (R)133.34%
Threonine THR (T)328.23%
Tryptophan TRP (W)71.8%
Valine VAL (V)215.4%
Tyrosine TYR (Y)174.37%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1981
HydrogenH3022
NitrogenN502
OxygenO575
SulphurS15

FormulaC1981H3022N502O575S15
Total Number of Atoms:6095


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):34
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    64330
Absorption 0.1% (=1 g/l)    1.477,   assuming all pairs of CYS residues form cystines

Ext. coefficient    63830
Absorption 0.1% (=1 g/l)    1.466,   assuming all CYS residues are reduced
Aromaticity:0.129

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.90, 28.28, 23.39]

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:77.4293
Grand average of hydropathicity (GRAVY):-0.22