Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4186
Number of amino acids:326
Molecular Weight:35244.27 Da
Theoretical pI:4.74


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)288.59%
Cysteine CYS (C)92.76%
Glutamic Acid GLU (E)195.83%
Aspartic Acid ASP (D)226.75%
Glycine GLY (G)195.83%
Phynylalanine PHE (F)185.52%
Isoleucine ILE (I)144.29%
Histidine HIS (H)51.53%
Lysine LYS (K)92.76%
Methionine MET (M)82.45%
Leucine LEU (L)288.59%
Asparagine ASN (N)206.13%
Glutamine GLN (Q)82.45%
Proline PRO (P)82.45%
Serine SER (S)4614.11%
Arginine ARG (R)175.21%
Threonine THR (T)195.83%
Tryptophan TRP (W)10.31%
Valine VAL (V)237.06%
Tyrosine TYR (Y)51.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1517
HydrogenH2395
NitrogenN425
OxygenO507
SulphurS17

FormulaC1517H2395N425O507S17
Total Number of Atoms:4861


Total number of positively charged residues (ARG + LYS):26
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13450
Absorption 0.1% (=1 g/l)    0.382,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.367,   assuming all CYS residues are reduced
Aromaticity:0.074

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.79

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.30, 28.53, 25.46]

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:79.2945
Grand average of hydropathicity (GRAVY):-0.13