Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4794
Number of amino acids:344
Molecular Weight:38237.09 Da
Theoretical pI:4.9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)236.69%
Cysteine CYS (C)113.2%
Glutamic Acid GLU (E)195.52%
Aspartic Acid ASP (D)205.81%
Glycine GLY (G)205.81%
Phynylalanine PHE (F)164.65%
Isoleucine ILE (I)205.81%
Histidine HIS (H)61.74%
Lysine LYS (K)92.62%
Methionine MET (M)113.2%
Leucine LEU (L)329.3%
Asparagine ASN (N)257.27%
Glutamine GLN (Q)164.65%
Proline PRO (P)123.49%
Serine SER (S)349.88%
Arginine ARG (R)174.94%
Threonine THR (T)195.52%
Tryptophan TRP (W)10.29%
Valine VAL (V)205.81%
Tyrosine TYR (Y)133.78%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1666
HydrogenH2606
NitrogenN458
OxygenO530
SulphurS22

FormulaC1666H2606N458O530S22
Total Number of Atoms:5282


Total number of positively charged residues (ARG + LYS):26
Total number of negatively charged residues (ASP + GLU):39
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    25495
Absorption 0.1% (=1 g/l)    0.667,   assuming all pairs of CYS residues form cystines

Ext. coefficient    24870
Absorption 0.1% (=1 g/l)    0.650,   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 : 48.74

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.65, 26.45, 24.71]

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:82.5
Grand average of hydropathicity (GRAVY):-0.19