Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4880
Number of amino acids:346
Molecular Weight:38228.24 Da
Theoretical pI:9.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)216.07%
Cysteine CYS (C)82.31%
Glutamic Acid GLU (E)174.91%
Aspartic Acid ASP (D)195.49%
Glycine GLY (G)277.8%
Phynylalanine PHE (F)216.07%
Isoleucine ILE (I)195.49%
Histidine HIS (H)82.31%
Lysine LYS (K)288.09%
Methionine MET (M)61.73%
Leucine LEU (L)3710.69%
Asparagine ASN (N)72.02%
Glutamine GLN (Q)82.31%
Proline PRO (P)216.07%
Serine SER (S)329.25%
Arginine ARG (R)205.78%
Threonine THR (T)195.49%
Tryptophan TRP (W)10.29%
Valine VAL (V)195.49%
Tyrosine TYR (Y)82.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1716
HydrogenH2732
NitrogenN466
OxygenO493
SulphurS14

FormulaC1716H2732N466O493S14
Total Number of Atoms:5421


Total number of positively charged residues (ARG + LYS):48
Total number of negatively charged residues (ASP + GLU):36
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17920
Absorption 0.1% (=1 g/l)    0.469,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17420
Absorption 0.1% (=1 g/l)    0.456,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.29

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.35, 25.14, 23.41]

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:85.1154
Grand average of hydropathicity (GRAVY):-0.18