Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5844
Number of amino acids:278
Molecular Weight:31776.64 Da
Theoretical pI:9.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)82.88%
Cysteine CYS (C)124.32%
Glutamic Acid GLU (E)134.68%
Aspartic Acid ASP (D)124.32%
Glycine GLY (G)165.76%
Phynylalanine PHE (F)93.24%
Isoleucine ILE (I)165.76%
Histidine HIS (H)41.44%
Lysine LYS (K)248.63%
Methionine MET (M)62.16%
Leucine LEU (L)258.99%
Asparagine ASN (N)165.76%
Glutamine GLN (Q)113.96%
Proline PRO (P)103.6%
Serine SER (S)2810.07%
Arginine ARG (R)134.68%
Threonine THR (T)113.96%
Tryptophan TRP (W)20.72%
Valine VAL (V)227.91%
Tyrosine TYR (Y)207.19%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1417
HydrogenH2228
NitrogenN378
OxygenO415
SulphurS18

FormulaC1417H2228N378O415S18
Total Number of Atoms:4456


Total number of positively charged residues (ARG + LYS):37
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    41550
Absorption 0.1% (=1 g/l)    1.308,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40800
Absorption 0.1% (=1 g/l)    1.284,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.85

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.81, 25.18, 18.70]

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:83.3454
Grand average of hydropathicity (GRAVY):-0.31