Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4672
Number of amino acids:238
Molecular Weight:27340.1 Da
Theoretical pI:5.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)208.4%
Cysteine CYS (C)62.52%
Glutamic Acid GLU (E)125.04%
Aspartic Acid ASP (D)177.14%
Glycine GLY (G)93.78%
Phynylalanine PHE (F)145.88%
Isoleucine ILE (I)166.72%
Histidine HIS (H)62.52%
Lysine LYS (K)145.88%
Methionine MET (M)52.1%
Leucine LEU (L)197.98%
Asparagine ASN (N)166.72%
Glutamine GLN (Q)62.52%
Proline PRO (P)114.62%
Serine SER (S)135.46%
Arginine ARG (R)114.62%
Threonine THR (T)156.3%
Tryptophan TRP (W)62.52%
Valine VAL (V)125.04%
Tyrosine TYR (Y)104.2%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1235
HydrogenH1875
NitrogenN325
OxygenO357
SulphurS11

FormulaC1235H1875N325O357S11
Total Number of Atoms:3803


Total number of positively charged residues (ARG + LYS):25
Total number of negatively charged residues (ASP + GLU):29
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    48275
Absorption 0.1% (=1 g/l)    1.766,   assuming all pairs of CYS residues form cystines

Ext. coefficient    47900
Absorption 0.1% (=1 g/l)    1.752,   assuming all CYS residues are reduced
Aromaticity:0.126

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.61

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.35, 20.59, 23.53]

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:80.3781
Grand average of hydropathicity (GRAVY):-0.29