Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4489
Number of amino acids:353
Molecular Weight:38832.12 Da
Theoretical pI:7.73


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)287.93%
Cysteine CYS (C)92.55%
Glutamic Acid GLU (E)82.27%
Aspartic Acid ASP (D)226.23%
Glycine GLY (G)195.38%
Phynylalanine PHE (F)215.95%
Isoleucine ILE (I)154.25%
Histidine HIS (H)61.7%
Lysine LYS (K)71.98%
Methionine MET (M)71.98%
Leucine LEU (L)4011.33%
Asparagine ASN (N)257.08%
Glutamine GLN (Q)133.68%
Proline PRO (P)185.1%
Serine SER (S)308.5%
Arginine ARG (R)246.8%
Threonine THR (T)318.78%
Tryptophan TRP (W)20.57%
Valine VAL (V)226.23%
Tyrosine TYR (Y)61.7%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1708
HydrogenH2700
NitrogenN484
OxygenO519
SulphurS16

FormulaC1708H2700N484O519S16
Total Number of Atoms:5427


Total number of positively charged residues (ARG + LYS):31
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    20440
Absorption 0.1% (=1 g/l)    0.526,   assuming all pairs of CYS residues form cystines

Ext. coefficient    19940
Absorption 0.1% (=1 g/l)    0.513,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.86

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.03, 26.06, 23.51]

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:86.7703
Grand average of hydropathicity (GRAVY):-0.08